JP4575480B2 - Substation protection control system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To digitize almost all the circuits and devices constituting a system, including drive circuits, and current and voltage transformer circuits of a transformer apparatus body, and combine them by a communication means in which the number of electric cables is decreased, in comparison to the case of an analog technology. <P>SOLUTION: In a constitution with the AC electrical quantity of the main circuit of the transformation device body 25 input into an integrated unit 39 and sampling synchronization performed; sampling data are input into a protection-and-control means for monitoring, control and protect the transformer apparatus body; and commands from a protection-and-control means 23 and a monitoring-and-control means 4 are input into a device control means 30 to monitor and control the transformation device body 25, a communication means for the device control means that not only relays and transmits device control-and-monitor data from the protection-and-control means 23, the integrated unit 39 and the device control means 30 to the protection-and-control means, but also relays and transmits control signals from the protection-and-control means to the device control means; and a process bus communication means 43, that relays data to be transmitted and received between a process bus and the protection-and-control means or the device control means are combined with a parallel transmission means. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a substation protection control system in which a digital transformer that detects an AC electric quantity of a substation main body and performs digital conversion and outputs a digital value and a protection control system are connected by communication means.

  The prior art will be described below by taking an example of a substation protection control system in a substation. With the recent development of communication and digital technology, a device using a digital arithmetic processor and communication means has been partially applied to protection control systems in substations. FIG. 53 shows a configuration diagram of a conventional protection control system.

  In FIG. 53, reference numeral 1 shown by a one-dot chain line is the control main building of the substation. Inside this control main building 1, the remote monitoring and control device 2 that relays information to a remote control station (not shown), monitoring the entire substation A centralized monitoring control device 3 that performs control and line control devices 5-1 to 5-n installed in units of lines such as power transmission lines are connected by a station bus 7, and each line control device 5-1 to 5- n is configured to be connected to protection devices 6-1 to 6-n for protecting each of the transformer main bodies 8-1 to 8-n, which will be described later. For convenience, the remote monitoring control device 2 and the centralized monitoring control device 3 are collectively referred to simply as the monitoring control device 4.

  The transformer equipment main bodies 8-1 to 8-n, the line control devices 5-1 to 5-n, and the protection devices 6-1 to 6-n are connected via the on-site control devices 9-1 to 9-n. The substation main body 8-1 is an example of a power transmission line facility, and includes a current transformer 10, a voltage transformer 11, a switch 12, such as a circuit breaker, a disconnecting switch, a bus 13 and a power transmission line 14.

  The current transformer 10, the voltage transformer 11, the switch 12 and the field control device 9-1 are devices to which analog technology is applied, and the connection between the transformer device main body 8-1 and the field control device 9-1 and the field control. For the connection between the device 9-1 and the line control device 5-1 or the protection device 6-1, electric cables 15 and 16 corresponding to the amount of information are used.

  As the remote monitoring control device 2, the centralized monitoring control device 3, the line control devices 5-1 to 5-n, and the protection devices 6-1 to 6-n, digital devices to which a digital arithmetic processor is applied are applied. A station bus 7 to which communication means is applied is used for information transmission between the devices, but the connection between the line control device 5-1 and the protection device 6-1 has many interface methods using contacts, and is used as a connection medium. In many cases, an electric cable 17 corresponding to the amount of information is used.

Next, FIG. 54 shows a hardware configuration of conventional line control devices 5-1 to 5-n. As shown in FIG. 54, each of the line control devices 5-1 to 5-n takes in an AC electric quantity of current or voltage, and is a voltage value at a level that can be directly handled by an electronic circuit that performs analog input filtering and A / D conversion. And an input converter unit (abbreviation, input / change) 501 that transforms into a current value, an input unit (abbreviation, DI) 502 that implements a contact input circuit, an output unit (abbreviation, DO) 503 that implements a contact output, and an AC electric quantity An analog input unit (abbreviated as AI) 504 that performs digital conversion processing, an arithmetic unit (abbreviated as CPU) 505 that performs control function processing, a communication unit (abbreviated as communication) 506 that performs transmission processing, and a power source for each unit The power supply unit (abbreviation, power supply) 507 to supply is comprised.

  Similarly, for the protective devices 6-1 to 6-n, an input converter unit (input change) 501 that takes in an alternating current amount of current or voltage and converts it into a voltage value and a current value at a level that can be directly handled by an electronic circuit, and contacts An input unit (DI) 502 for mounting an input circuit, an output unit (DO) 503 for mounting a contact output, an analog input unit (AI) 504 that performs processing such as digital conversion of AC electric quantity, and an operation that performs protection function processing A unit (CPU) 505, a communication unit (communication) 506 that performs transmission processing, and a power supply unit (power supply) 507 that supplies power to each unit are configured.

  In addition, the input unit (DI) 502 and the output unit (DO) 503 have a method of mounting a plurality of units according to the required number of points. Therefore, the unit related to input / output occupies the majority.

In addition to the prior art shown in FIGS. 53 and 54, upstream information such as current, voltage information and device information and downstream information such as device control commands from a protection relay and control system are transmitted via the information processing device. The invention is also known (for example, see Patent Document 1).
JP 60-74917 A

  The digitalization of the protection control device reduces the size and cost of the device, the self-diagnosis function implements labor savings, and the use of communication means for information transmission between devices reduces the number of electrical cables. However, since the analog technology is applied to the drive circuit and current / voltage transformer circuit of the transformer device main body, the following problems still remain.

(1) Since analog information using electrical cables is applied to information transmission between the substation equipment and the protection control device that protects and controls it, the protection control device is compared with a digital circuit as an input / output circuit. A contact input circuit that handles large voltages and currents, a contact output circuit, an input converter unit that transforms current and voltage into manageable values, and an analog input circuit that digitally converts analog quantities must be installed in all protection control devices. For this reason, the size of the apparatus is increased and the economic efficiency is lowered.

(2) The arithmetic processing unit that performs protection or control function processing of each protection control device has been reduced in size by digitization, but due to the reason of (1) above, the hardware amount of the input / output circuit is large, and substation equipment Since these input / output circuits have been increased in size to insulate them from the main body and a space for processing a large amount of electrical cables is required, the protection and control unit is housed in a dedicated independent housing. It is necessary to configure the protection device and the control device independently for each line, which causes an increase in the installation space of the device.

(3) Between the transformer main body and the protection control device is a parallel connection method based on analog information, and an electric cable is used as a transmission medium. Therefore, a large number of cables corresponding to the number of signal points are required. For this reason, high costs related to cables such as cable costs, construction costs for cable pits, laying costs, etc. were incurred, leading to an increase in substation construction costs.

(4) Since the analog technology is applied to the drive circuit and current / voltage transformer circuit of the substation main body, the hardware becomes large, which has been the cause of the increase in size of the substation main body. . In addition, it took a lot of time to assemble and connect each circuit performed by a maker's worker at the factory and on-site installation.

(5) For the same reason as (4) above, it is difficult to constantly monitor and automatically diagnose the substation equipment, and sufficient diagnostic information related to maintenance cannot be obtained. It was a factor.

(6) A configuration in which all the circuits and devices constituting the system are not digitized and all the devices are not coupled by communication means, so the amount of information is limited and the function expansion cannot be easily performed. It was. In addition, it has been difficult to construct an optimum system by effectively using data held by each device.

(Object of invention)
The present invention has been made in order to solve the above-mentioned problems. By digitizing almost all the circuits and devices constituting the system, including the drive circuit and current / voltage transformer circuit of the main body of the transformer, An object of the present invention is to provide a substation protection control system in which electric cables are connected by a communication means that reduces the number of electric cables.

In order to solve the above-mentioned problem, the invention related to the substation equipment protection control system according to claim 1 includes a substation main body installed in the electric station, and monitoring control of the entire electric station including the substation main body, A monitoring and control device that relays information with a remote control station,
A plurality of sensor units that input the main circuit AC electricity amount of the transformer device body, convert it into digital data, and output it,
An integrated unit having a function of integrating digital data input from the plurality of sensor units and transmitting it as digital data;
Protection control means for inputting digital data output from the integrated unit and performing at least one function of monitoring, control and protection of the substation main body;
While receiving a command from the protection control means or the monitoring control device, equipment control means for monitoring and controlling the substation main body,
In a substation equipment protection control system comprising the integrated unit, the protection control means, the equipment control means, and a communication means for forming an information transmission path between the monitoring control devices,
Device control monitoring data from the protection control unit, the integrated unit, and the device control unit are relayed and transmitted to the protection control unit, and a control signal from the protection control unit is relayed and transmitted to the device control unit. A communication means for device control means, and a process bus communication means for relaying data sent and received between the process bus as a serial transmission medium and the protection control means or the device control means, are coupled to a parallel transmission medium. It is what.

  Thereby, the communication means for bus connection and the process bus connection cable of the integrated unit connected to the process bus can be deleted, and the protection control means having the function of the protection control unit and the integration means having the function of the integration unit are provided. Since data transmitted / received between them is set to parallel transmission and the communication load of the process bus is reduced by this configuration, it is possible to ensure the protection of the substation main body and the real-time property of monitoring control.

  In addition, the parallel transmission between the process bus communication means and the protection control means enables the protection control means to operate as an independent function connected to the process bus, and the input / output and operation are the same as the protection control unit directly connected to the conventional process bus. It can be handled as anything. The integrated unit can also be handled as input / output and operation equivalent to those of the integrated unit directly connected to the conventional process bus by parallel transmission between the process bus communication means and the integrated unit. Furthermore, this process bus connection function enables data transmission / reception via the process bus to / from the process bus direct connection protection control unit, integrated unit, device control means, and the like.

  According to a second aspect of the present invention, there is provided a substation protection control system, wherein a part or all of the communication means is constituted by wireless communication means. As a result, there is a feature that it is not necessary to install a communication line between the device and the monitoring control device.

  According to a third aspect of the present invention, there is provided a substation equipment protection control system for supplying power from a control power source to a whole or a part of the digital data output means, the equipment control means and the protection control means through a power line. In addition, this power line and each of the above means are coupled via a power line communication interface, and this power line is used in combination as an information transmission path. As a result, there is a feature that it is not necessary to install a communication line in addition to the power line between the equipment unit and the monitoring control device.

  According to a fourth aspect of the present invention, the protection control means includes a control digital arithmetic processor and a control communication means for monitoring and controlling the substation main body. And a protection digital arithmetic processor for performing a protection operation of the substation main body and a protection means having a protection communication means, and in particular, the line control means and the protection means are separated in hardware. It is characterized by. In the present invention, since the digital arithmetic processor is employed as the arithmetic means of the protection means and the line control means, the input means and the communication means can be unified, and the hardware can be greatly reduced.

  According to a fifth aspect of the present invention, there is provided a circuit control unit including a control digital arithmetic processor for performing monitoring and control calculations of the substation main body, a control communication unit, and the substation apparatus. A protection digital arithmetic processor for performing protection calculation of the main body and a protection means having a protection communication means, and the digital control processor and the communication means of the line control means and the protection means are configured by common hardware, respectively. It is characterized by that.

  By adopting this configuration, the protection control unit is integrated with the protection control unit configuration according to claim 6 that separates the hardware of the control unit and the protection unit, so that the hardware can be reduced. It is possible to reduce the size and cost of the protection control unit.

  According to a sixth aspect of the present invention, there is provided a control apparatus for controlling and transforming a substation equipment, a circuit control means including a control digital arithmetic processor for performing monitoring and control computations of the substation main body and a control communication means, and the substation equipment. A protection digital arithmetic processor for performing a protection operation of the main body and a protection means having a protection communication means, and at least a part of the line control means and the digital arithmetic processor or the communication means of the protection means is a common hardware It is characterized by comprising.

  By adopting this configuration, it is possible to configure a protection control unit considering the balance between reliability and cost. The parts requiring high reliability are separated into hardware for protection and control, but the parts having a low failure rate and particularly the parts where the protection performance is not significantly disturbed share the hardware for cost reduction.

  Further, the invention relating to the substation equipment protection control system according to claim 7 is that one set of current detection means and voltage detection means for detecting the main circuit AC electric quantity of the substation equipment body are arranged at both ends of the circuit breaker. It is a feature. As a result, for each bay, the optimum configuration can be obtained to obtain all the electricity required for line protection, bus protection, and circuit breaker synchronous opening and closing. Can be transmitted to the unit. Further, since the voltage detection means is arranged on the bus side, it is possible to dispense with the distribution of the bus voltage information. In addition, there is an advantage that an electric station having a double-bus configuration of A-B has no need to switch the B-B voltage information.

  The invention relating to the substation equipment protection control system according to claim 8 is the equipment unit for performing communication between the digital data output means provided for each bay and the equipment control means and the protection control means. An internal communication bus, an inter-device unit communication bus for performing communication between the internal device unit communication buses, and a protection control means such as opening / closing necessary for control protection through the in-device unit communication bus and the inter-unit unit communication bus. Data transmission / reception is performed.

  As a result, a communication bus can be provided for each device, enabling communication of the entire substation by simply connecting a single communication line from the device to the inter-device communication bus, thereby reducing hardware and installation costs. Is possible.

  According to a ninth aspect of the present invention, there is provided an electrical equipment protection control system, wherein the communication means comprises an optical fiber and an optical fiber hub. Thereby, a communication bus resistant to electromagnetic noise can be realized.

  According to a tenth aspect of the invention, the intra-device unit communication bus comprises a backplane bus for multi-bit data communication using a copper wire or a printed circuit board, and the inter-device unit communication bus is serial. It is characterized by comprising an optical fiber for communicating data and a hub for the optical fiber. This makes it possible to realize a communication means that is fast and low cost for the in-device communication bus and that is resistant to electromagnetic noise.

  According to an eleventh aspect of the present invention, there is provided a communication bus for connecting a sensor unit or an integrated unit, device control means, and protection control means in a plurality of bays. And a switching hub having a data exchange function, and communication between the respective device units and between the device units and the monitoring control device is performed by data exchange of the switching hub. As a result, it is possible to reduce the design cost of the communication bus with a simple configuration, minimize the amount of communication data of each communication line by data exchange, and further reduce the cost.

  According to the invention related to the substation equipment protection control system according to claim 12, an intranet or the Internet is connected to the communication means via a gateway, and a browser is further connected to the intranet or the Internet. A web server is incorporated in at least one of the means, the units of the protection control means, the means, and the monitoring control device.

  This makes it possible to monitor and control the entire substation or individual devices and devices from a remote browser using general-purpose communication procedures used on the Internet. Labor saving can be achieved. Furthermore, it is possible to remotely maintain the substation equipment and equipment, and to quickly respond to abnormalities and accidents.

  According to a thirteenth aspect of the invention, the web server has a wireless communication means with the gateway or personal computer, and the wireless communication means is provided in either the gateway or the personal computer. The data of the web server is wirelessly transmitted to a gateway or a personal computer.

  As a result, the web server data can be transmitted directly to the gateway by wireless communication means, so that the amount of information transmitted on the process bus can be reduced compared to the method of transmitting the web server data via the process bus. A reasonable process bus with reduced costs can be applied. Moreover, since the sensor information installed in the device monitoring apparatus can be taken into the personal computer via the web server, the sensor can be used as a test sensor. For this reason, it is not necessary to install a test sensor and a measuring instrument in the factory test and the field installation test.

  Furthermore, by using a personal computer as an interface terminal of the device monitoring apparatus and taking in data according to a command from the personal computer, an automatic test function, an automatic inspection function, and an automatic recording function can be realized. Therefore, it is possible to save labor for the tester and reduce the test cost in the factory test and the field installation test. In addition, as device control monitoring data, data acquired during factory tests and data acquired during field installation tests are stored in a data storage means as a database, so that the current device status can be changed at the time of factory shipment and field installation testing. It is easy to compare with the state of the device, and the efficiency of maintenance and inspection of equipment can be improved.

  According to the present invention, it is possible to delete the analog input / output circuit between the main body of the transformation device that has been mounted on the protection control device in the past, and the input / output is all via the communication means, and the circuit that handles a large voltage and a large current is provided. Since it no longer exists, the hardware configuration can be configured only with a digital arithmetic processing unit for processing the protection control function and a communication unit for performing communication processing, which greatly reduces hardware, Miniaturization and a significant reduction in electrical cables are possible.

  In addition, the miniaturization of the device makes it possible to incorporate it in the main body of the substation equipment. Further, since each unit is provided with a digital arithmetic processor and digitized, self-diagnosis of each unit and the substation main body can be performed. Further, by combining the units with communication means, various information can be effectively used, and maintenance operability and economic efficiency can be greatly improved.

  According to another invention, since the protection control unit, the integrated unit, the communication means of the device control means, and the process bus communication means are coupled by the parallel transmission medium, the communication load on the process bus is reduced. It is possible to ensure the protection of the device body and the real-time property of the monitoring control.

  Embodiments of the present invention will be described below with reference to the drawings. In the drawings of the present invention, portions corresponding to those of the prior art will be described with the same reference numerals.

(First embodiment)
FIG. 1 is a system configuration diagram showing a first embodiment of a substation equipment protection control system according to the present invention.
In FIG. 1, reference numeral 1 denotes a control main building for an electrical station such as a substation, and a remote monitoring control device 2 for relaying information to a remote control station (not shown) and a centralized monitoring control for monitoring and controlling the entire substation. A monitoring control device 4 composed of the device 3 is installed.

  The remote monitoring control device 2 and the centralized monitoring control device 3 are coupled by a station bus 7, and a protection control unit (indicated as PCU in the figure) 23- in a substation equipment unit 20-1 to 20-n described later. 1 is configured to be coupled. The protection control unit 23-1 includes a line control unit 21-1 and a protection unit 22-1, and more specifically, the line control unit 21-1 and the protection unit 22-1 are connected to the station bus 7, respectively. .

  The substation equipment units 20-1 to 20-n are the primary, secondary, and tertiary units of transmission lines in the substation, or bus connection lines, bus division lines, or transformer lines (not shown). It is composed of a transformer main body (also referred to as a main circuit device), an instrument transformer as an electric quantity detector, and other various elements as described below.

  In the present embodiment, a power transmission line of a gas insulated switchgear (GIS) will be described as an example of a substation main body. In addition, since the structure of a transformation device unit is a structure similar to each line, the said structure is demonstrated using the transformation device unit 20-1, and description of another unit is abbreviate | omitted.

  The substation main body is composed of a bus 24, a circuit breaker 25, a disconnecting switch, a switch 25 such as a grounding switch, and a power transmission line 26. The alternating current flowing through each substation main body and the applied alternating voltage are extracted by an instrument transformer (or referred to as an electric quantity detector) 27 installed at a predetermined site, and the extracted analog electric quantity is The data is input to a sensor unit (indicated as SU in the figure) 28, converted from analog to digital, and then output as digital data.

  The digital data output from the sensor unit 28 is transmitted directly or via an integrated unit to be described later to an in-device unit communication bus (also referred to as a process bus) 29. Further, the line control unit 21-1 and the protection unit 22- 1 is used here for calculation of monitoring, control and protection of the substation main body. In the present embodiment, a means for transmitting digital data directly or indirectly to the process bus 29 after inputting an analog electric quantity from the electric quantity detector 27 of the substation main body is referred to as a digital data output means.

  A control command (so-called downlink information) to the substation main body from the line control unit 21-1, the protection unit 22-1, or the central monitoring device 3 of the control main building, monitoring information from the substation main body (so-called uplink information), respectively, The data is transmitted / received by a device control unit 30 (indicated as CMU in the drawing) 30 via the process bus 29, and the device control unit 30 monitors and controls the substation main body, and issues a shut-off command to the switch 25.

  FIG. 2 is a diagram illustrating an example of a layout (arrangement relationship) of each GIS substation main body. In the drawing, an example of the arrangement of the sensor unit 28, the device control unit 30, and the protection control unit 23 with respect to the GIS, and a connection relationship between these units, the process bus 29, and the station bus 7 are shown.

  In FIG. 2, a metal container (hereinafter referred to as a tank) TA in which main circuit devices such as a circuit breaker (CB), a disconnect switch (DS), a ground switch (ES), a bus bar (BUS) and the like are housed together with an insulating gas, Installed on the base B, and provided with an instrument transformer as an electric quantity detection unit (not shown in FIG. 2) of the main circuit device in each tank TA, and provided an analog output signal in the vicinity of the signal extraction unit The sensor unit (VT and CT portions in FIG. 2) 28 converts the digital data.

  Similarly, the switch information (on, off information), gas density, hydraulic pressure, etc. of the breaker (CB), disconnector (DS), earthing switch (ES), and other switches are digitally processed by another device control unit 30. The signal is converted into an easy-to-use signal.

  The output terminals of these sensor units 28 are connected to an integrated unit (indicated as MU), which will be described later, and a protection control unit (PCU) 23 and equipment housed in the process control box 31 via the process bus 29. In addition to the control unit 30, the protection control unit 23 is configured to be connected to the station bus 7 extending from the control main building 1. Note that, in the configuration not using the integrated unit, the output terminal of the sensor unit 28 is directly coupled to the process bus 29.

  In FIG. 2, the process control box 31 is integrally provided on the base B on which the GIS tank TA is placed. However, the process control box 31 may be directly attached to the outer periphery of the tank TA. In this way, a configuration in which the process control box 31 is installed in the base B or the tank TA of the GIS is referred to as a built-in type.

  On the other hand, a configuration in which the process control box 31 is installed at a location away from the base B of the GIS, that is, at a location closer to the transformation device than the conventional control main building is referred to as a neighborhood type. The present invention can be applied to both the built-in type and the proximity type. Moreover, although GIS was mentioned as an example of a transformation device main body, a transformer with a tap and other electric power devices may be sufficient so that it may mention later.

  In the present embodiment, the field control device (reference numeral 9 in FIG. 53) in the prior art is abolished, and accordingly, the functions implemented in the field control device are replaced with the line control unit 21-1, the sensor unit 28, and the equipment. Distributed to the control unit 30 and the like.

  FIG. 3 is a diagram illustrating an example of the sensor unit (SU) 28. FIG. 3A is a hardware configuration diagram illustrating an example of the sensor unit (SU) 28, and FIG. 5 is a flowchart illustrating an example of a processing procedure for synchronization and timing in the sensor unit 28.

  In FIG. 3 (a), 28b is an analog input means, and the main circuit AC current or voltage analog electric quantity of the substation main body is input from the multi-channel transmission line 27I, and a return error is generated before A / D conversion. It is composed of an analog filter that cuts off harmonics for the purpose of reduction and an analog multiplexer that can select multiple channels. Reference numeral 28c denotes A / D conversion means for analog / digital conversion of the output of the analog input means 28b.

  A circuit composed of the analog input means 28b and the A / D conversion means 28c is referred to as a sampling synchronization input circuit 28d. By this sampling synchronization input circuit 28d, digital data corresponding to the amount of electricity of the main circuit device is taken into the internal bus 28e.

  Reference numeral 28a receives a time synchronization reference signal and reference time data from an integration unit MU39, which will be described later, from a communication path 40a facing one-to-one (also referred to as point-to-point, 1: 1 facing), and the sampling synchronization input. This is a synchronization means for correcting the deviation between the sampling of the circuit 28d and the reference signal for time synchronization. The output means 28g transmits the digital value of the electric quantity synchronized and timed to the one-to-one-facing communication path 38-1.

  Reference numeral 28f denotes a digital arithmetic processing unit (indicated as CPU) for controlling the sampling synchronization input circuit 28d, the synchronization means 28a, and the output means 28g via the internal bus 28e, and 28h supplies power to each circuit and means. It is a power source to do.

  The flowchart of FIG. 3B will be described. Here, since synchronization and time setting are performed in the sensor unit 28, the procedure S1 is skipped. Here, the reason for skipping step S1 is that in the present embodiment, the plurality of sensor units perform “sampling” using a common sampling signal, so that the interpolation processing of step S1 is unnecessary. In addition, the interpolation process is to process and match sampling data by interpolation with respect to data whose sampling is not synchronized. When sampling with a common sampling signal, the interpolation processing is not necessary because of synchronization.

  First, an analog electric quantity sampling signal generated by dividing a clock oscillator or the like provided in the sensor unit 28 as a reference is compared with a time synchronization reference signal, and a deviation (deviation) between the time synchronization reference signal and the sampling signal is detected. Is detected (step S2), and the corresponding electric quantity is phase-shifted from the phase corresponding to this deviation, so that the deviation is adjusted to 0 (zero). Alternatively, the sampling signal is corrected by this deviation (step S3).

  Further, the counter is run within a highly accurate fixed period of the time synchronization reference signal, and the electric quantity indicated by the counter value is timed by the reference time (in units of one second) + the counter value. Alternatively, the time is calculated from the counter value and added to the reference time to directly add the time (time stamp) (step S4).

  The protection control unit 23 coupled to the integrated unit 39 by the process bus 29 takes in a synchronized time-related electric quantity (digital value) from the integrated unit 39 and performs monitoring, control and protection of the substation main body.

In the flowchart of FIG. 3B, the procedure of time synchronization (synchronization of sampling and timed sampling data is referred to as time synchronization) is shown, but the function of sampling synchronization and timeding is shared. There are several patterns as described below. Table 1 shows an example of five patterns (patterns 1 to 5) regarding the function sharing of sampling synchronization and timing. The functions (A, B) described in Table 1 indicate the functions performed.

  In pattern 1, sampling synchronization and timing are performed by the integrated unit 39. In pattern 2, sampling synchronization is performed by the sensor unit 28, and time is set by the integrated unit 39. In pattern 3, the sensor unit 28 performs sampling synchronization and time setting. In pattern 4, sampling synchronization is performed by the sensor unit 28, and time is set by the protection control unit 23. In pattern 5, sampling synchronization is performed by the integrated unit 39, and time is set by the protection control unit 23.

  An embodiment related to the pattern 1 will be described in a seventh embodiment to be described later, and an embodiment related to the pattern 2 will be described in a modified example of the seventh embodiment and an eighth embodiment described later. An embodiment related to the pattern 3 will be described in a ninth embodiment to be described later.

  The pattern 4 can be implemented by rearranging the time-setting function of the integrated unit 39 to the protection control unit 23 in the relationship between the sensor unit 28 and the integrated unit 39 in the pattern 2. Further, the pattern 5 can be implemented by rearranging the timing function of the integrated unit 39 in the pattern 1 to the protection control unit 23.

Hereinafter, the pattern 4 and the pattern 5 will be described.
Since the sampling data is transmitted from the sensor unit 28 via the integrated unit 39 to the protection control unit 23 by the communication means, it takes time for transmission, and a delay occurs between the sampling time and the time assigned. This delay can be implemented in Pattern 4 and Pattern 5 as long as they are within the allowable range in terms of measurement, accuracy of time-changed data and protection accuracy (especially PCM relay protection method that requires counter-end and sampling synchronization). It is.

  Further, supplementing the digital arithmetic processing section (CPU and display) 28f in FIG. 3A, the CPU 28f is not necessarily an essential function. In the function sharing of time synchronization shown in Table 1, pattern 1, pattern 2, pattern 4 and pattern 5 are patterns with no time synchronization function or only sampling synchronization function, so the circuit control in the sensor unit is a combination of logic circuits. In some cases, it can be realized only by In this case, it goes without saying that the CPU 28f is unnecessary.

  FIG. 4 is a hardware configuration diagram illustrating an example of the protection control unit 23. The line control unit 21-1 and the protection unit 22-1 are respectively a digital arithmetic processing unit (CPU) 21a, 22a, a communication unit (communication) 21b, 22b, and a power source unit (power source) 21c for supplying power thereto. 22c.

  FIG. 5 is a hardware configuration diagram illustrating an example of the device control unit 30. The device control unit 30 includes a digital input means 30a, an analog input means 30b comprising an analog input circuit and an analog / digital conversion circuit, a digital arithmetic processing section (CPU) 30c for performing control / monitoring computations, and a drive comprising a semiconductor switch. The circuit 30d, data storage means 30e for accumulating control / monitoring data in the device control unit, process bus communication means 30f, etc., are connected by an internal bus 30g.

  The outputs of the pallet contact 25a and the monitoring sensor 25b of the switch 25 are input to the device control unit 30 from the digital input means 30a and the analog input means 30b via the signal line 25I, respectively. Taking the circuit breaker as an example, the output of the pallet contact 25a is contact information of the circuit breaker switching status information, hydraulic switch, gas density switch, and the like.

  The output of the drive circuit 30d of the device control unit 30 is input to the drive unit 25c of the opening / closing device 25 via the signal line 25I. The signals input to the drive unit 25c are, for example, a breaker coil, a closing coil drive signal, a hydraulic pump motor drive signal, etc., taking a breaker as an example.

  It goes without saying that further miniaturization can be achieved if the circuits shown in FIGS. 3, 4 and 5 are made into custom LSIs.

Next, the operation and effect of this embodiment will be described.
In the present embodiment, as described above, the sensor unit 28 performs digital conversion of the alternating current electric quantity extracted from a predetermined part of the GIS, and the digitized information is sent to the line control unit 21-1 through the process bus 29. 21-n and the protection units 22-1 to 22-n, and control commands and substations for the transformer main body from the line control units 21-1 to 21-n and the protection units 22-1 to 22-n. Since the device main unit monitoring information is exchanged by the device control unit 30 via the process bus 29, the information from the sensor unit 28 is transmitted to the line control units 21-1 to 21-n and the protection units 22-1 to 22-. n can be shared.

  As a result, in the line control units 21-1 to 21-n and the protection units 22-1 to 22-n, an analog input circuit and an electric cable through which a large current flows that are conventionally used for processing an AC electric quantity are provided. It becomes unnecessary, and the hardware can be greatly reduced in size compared with the prior art.

  Therefore, according to the present embodiment, it becomes possible to incorporate the device drive circuit, the digital conversion unit for the AC electricity amount, and the protection control unit into the main body of the substation, greatly reducing the electric cable, reducing the space of the control main building, and the substation There are effects such as downsizing the main body, reducing the substation site area, and shortening the construction period of the substation, thereby reducing the construction cost of the substation. Further, since each unit is digitized, that is, a digital arithmetic processor is built in, it is possible to perform self-diagnosis of each unit and the transformer main body.

(Second Embodiment)
6 and 8 are system configuration diagrams showing a second embodiment of the protection control system according to the present invention. In this embodiment, a part of the communication means is replaced from wired to wireless. FIG. 6 shows a system configuration diagram of a protection control system according to the second embodiment of the present invention, and FIG. It is a figure which changes and shows a part of.

  The embodiment of FIG. 6 is characterized in that the process bus 29 and the station bus 7 in FIG. 1 are coupled by a wireless unit. That is, in FIG. 6, the wireless communication unit 33 is connected to the station bus 7 and the wireless communication units 32-1 to 32-n are connected to the process bus 29, so that the current and voltage output from the sensor unit 28 can be handled. The digital data to be transmitted is transmitted to the process bus 29, and the line control unit 21 and the protection unit 22 take in necessary data from the process bus 29 and transmit a cutoff command or the like to the device control unit 30 via the process bus 29. To do.

  The station bus 7 transmits information between the remote monitoring and control device 2 and the centralized monitoring and control device 3 and the substation main unit 20 via the wireless communication units 33 and 32. In addition, information between the transformer main unit 20-1 to 20-n is also transmitted through the wireless units 33 and 32.

  Since the line control unit 21-1, the protection unit 22-1, the SU 28, and the CMU 30 are incorporated in the main body of the transformer device, the process bus in the device having a short communication distance communicates by wire, and the device having the long communication distance and the main building or device The device communicates wirelessly.

  FIG. 7 is a block configuration diagram of the wireless communication unit 32. Since the wireless communication unit 33 has the same configuration, the wireless communication unit 32 will be described as an example here. The wireless communication unit 32 includes a digital arithmetic processing unit 32a, a power supply portion 32b, a wired communication interface (I / F) 32c, a wireless communication interface (I / F) 32d, and an antenna 32e. (I / F) 32d is wirelessly transmitted to the station bus 7 via the wireless communication unit 33, and conversely, the wireless information from the station bus 7 transmitted from the wireless communication unit 33 is received, and the process bus 29 Transmit to.

  FIG. 8 is a partial modification of the embodiment of FIG. 6, in which the wired process bus 29 in FIG. 6 is removed, and instead the sensor unit 28, device control unit 30, line control unit 21. The wireless communication unit 32 is directly connected to each of the protection units 22, and communication between the sensor unit 28, the device control unit 30, the line control unit 21, and the protection unit 22 in the substation device unit, the substation device unit 20 and the control main building. Communication between 1 and communication between substation equipment units are performed wirelessly. The wireless communication unit used in this modification has almost the same configuration and function as those shown in FIG.

  When the transformer body is large or when the transformer body is separated for each phase (so-called single-phase GIS or AIS (air-insulated switchgear) in which the A-phase, B-phase, and C-phase are separated into phases) In the case of a GIS having a three-phase collective configuration, if the transformer main body is large, the communication distance between the line control unit 21-1, the protection unit 22-1, the SU 28, and the CMU 30 is long. Effective in reducing communication cables.

  As described above, according to the second embodiment (including modifications), the communication line is laid between the substation equipment unit and the monitoring control device in the control main building 13 and the process bus in the substation equipment unit is installed. The effect of eliminating the need for laying can be achieved. Moreover, when laying a process bus on an existing substation device, it is possible to obtain an effect that a new communication cable is not required by using radio.

(Third embodiment)
FIG. 9 is a system configuration diagram showing a third embodiment of the protection control system according to the present invention.
In this embodiment, a power line (control bus) 35 of a control power supply 34 that supplies power to the sensor unit 28, the device control unit 30, the line control unit 21, and the protection unit 22 is to be used as a data communication line.

  For this purpose, a power line communication interface (I / F) unit 36 is provided in each of the sensor unit 28, the device control unit 30, the line control unit 21, and the protection unit 22, and the power line communication interface (I / F) units 36 are connected to each other. The power lines 35 are coupled. A control power supply 34 for supplying power to the power line 35 is connected in the control main building 1, and a power line-station bus bridge 37 for passing only information between the power line 35 and the station bus 7 is coupled. .

  As a result, the sensor unit 28 transmits current and voltage data to the power line 35, the line control unit 21 and the protection unit 22 capture necessary data from the power line 35, and sends a cutoff command or the like to the device control unit 30 through the power line 35. Send.

  A power line-station bus bridge 37, a power line 35, and a power line communication interface (I / F) unit 36 are required between the station bus 7 connected to the monitoring control device 3 and the process bus 29 in the transformer unit. Send and receive information. Similarly, information between the transformation equipment units 20-1 to 20-n is also exchanged through the power line 35 and the station bus 7.

  As described above, according to this embodiment, the power line 35 may be laid between the transformer device unit 20 and the monitoring control device 4, and there is an effect that it is not necessary to lay a dedicated communication line. it can.

(Fourth embodiment)
FIG. 10 is a diagram showing a fourth embodiment of a substation protection control system according to the present invention, and in particular, a diagram showing a hardware configuration of the protection control unit 23.

  In the present embodiment, the line control unit 21 and the protection unit 22 that are configured as separate units as hardware are configured as one protection control unit 23. The line control unit 21-1 and protection unit 22-1 shown in FIG. 3A described above have substantially the same hardware (although they may be the same), although there are differences in control and protection in the functions realized by the application software. Therefore, it is realized by installing protection and control application software on common hardware.

  In this case, it is possible to apply a digital arithmetic processing means (CPU) having a processing capacity higher than the processing load for operating both the protection and control functions. This hardware can be easily constructed with an LSI or the like. The digital arithmetic processing means (hereinafter referred to as a common CPU) 23a for processing both protection and control functions incorporating an LSI eliminates the need for hardware and protection protection and control. For the same reason, the control communication means 21c and the protection communication means 22c can also be shared, and can be replaced with a communication means (hereinafter referred to as a common communication means) 23c that processes both control side and protection side communication.

  When the common CPU 23a and the common communication unit 23c are applied to the protection control unit 23, the power source can be replaced with one power source (hereinafter referred to as a common power source) 23b.

  The above description has been made that the line control unit 21 and the protection unit 22 can be integrated because the protection and control can be processed by the single CPU 23a due to the improvement of the hardware performance of the CPU or the like. The reason why this configuration can be applied is not only the improvement of hardware performance. One of the main reasons why protection and control can be realized with integrated hardware is that this embodiment is configured in a process bus-compatible substation protection control system and has a common communication protocol.

  That is, in a conventional protection control device that does not employ a process bus configuration, the main circuit alternating current electricity amount of the substation main body is captured, and the input converter converts, for example, a voltage of AC163.84V to about 7V. The current around AC163.84A is converted to about 47mA, this electric quantity is captured and filtered by an analog input device, A / D converted at a predetermined sampling interval, and converted into a digital value that can be processed by a digital circuit. The control or protection computing unit is configured to perform monitoring control of the substation main body and internal / external accident determination based on the digital value and to output a circuit breaker trip command to the circuit breaker control device through an auxiliary contact or the like. .

  In this case, the control and protection are divided into separate units, and the control unit has a substation protection control system configuration in which the control unit relays the monitoring control information and the protection unit information to communicate with a general electric station or the like.

  In such a conventional configuration, the protection unit performs a dedicated protocol communication for communication with the control unit, and the control unit performs a dedicated protocol communication with a telecon that communicates with a general electric station etc. The communication interface with the system is often different.

  In addition, when operating the control device of the substation main body from the control unit, or when issuing a trip command from the protection unit to the control device such as the circuit breaker of the substation main body, the operation is performed by passing contact information that is independent of each other. ing.

  On the other hand, in the process bus configuration of the present invention, the analog input device or the like is replaced with a sensor unit, a control command is output to the control device of the substation main body, and a command to shut off the circuit breaker is issued according to an instruction from the protection unit. The output part or the like becomes the device control unit 30, the protection computing unit becomes the protection unit 22 of the protection control unit 23, and the control computing unit becomes the control unit 21 of the protection control unit 23.

  These units are connected to the process bus 29 and communicate with each other using a common communication protocol. Of course, the control unit 21 and the protection unit 22 connected to the upper station bus 7 communicate with each other using a common communication protocol.

  That is, with the process bus configuration, the control unit 21 and the protection unit 22 in the protection control unit 23 communicate with the station bus 7 using a common communication protocol, and also communicate with the process bus 29 using a common communication protocol. In addition, transmission of contact information by a one-to-one facing method, which has been conventionally independent for protection and control, can also be transmitted using the same communication protocol by sharing the process bus 29.

  Since the communication means can be standardized in this way, the communication means 22c and the communication means 21c of the protection unit 22 and the control unit 21 can be shared, and the communication means can also be shared, so that the CPU and the power source are separated. Therefore, the communication means, the CPU, and the power source can be shared (integrated) for protection and control.

  As described above, for two main reasons, the protection control unit 23 includes a common CPU 23a that performs monitoring, control, and protection calculations for the substation main body, and a common communication unit 23c that communicates with the station bus 7 and the process bus 29. The common CPU 23a and the common power source 23b for operating the common communication means 23c can be used. The protection control unit 23 configured in this manner sequentially performs protection and control processing at a predetermined calculation cycle.

  The protection control unit 23 takes in the digital electric quantity processed by the sensor unit 28 (the digital electric quantity with time synchronized with the main circuit AC quantity of the transformer main body) from the process bus 29. Depending on the performance, the data capture time may not be guaranteed. In such a case, an optimal value may be determined for the calculation cycle in consideration of variations in data acquisition time, maximum delay, allowable time from the detection of an accident at the time of a power system failure to a trip to the substation main body, and the like.

  According to this embodiment described above, since the protection control is integrated compared to the protection control unit configuration in which hardware is separated by control and protection, the hardware can be reduced and the protection control unit can be downsized. This can be realized and the cost of the apparatus can be reduced.

  In addition, although the redundancy with respect to a failure becomes low by integrating the hardware of a control unit and a protection unit, when this is unacceptable, this protection control unit should just be used in duplicate. When this protection control unit is duplicated, there is no cost merit, but it is possible to protect and control even if one side fails compared to a protection control unit with a separate configuration for protection and control. The reliability of the system will be high.

(Modification of the fourth embodiment)
Since the main functions of the CPU, communication means, and power supply in the protection control unit 23 of this modification are the same as those of the embodiment already described, the functions of this modification will be mainly described below.

  FIG. 11 shows a configuration of a modified example of the protection control unit 23. In this modification, the CPU hardware is separated into a control CPU 21a for monitoring and controlling the main body of the transformer and a protection CPU 22a for performing a protection operation for determining an internal / external accident of the power system, and the station bus 7 A station bus communication means 23c-1 for communicating with the process bus 29, a control process bus communication means 23c-3 for communicating with the process bus 29, and a protection process bus communication means 23c-2, and further provided with a protection CPU 22a and a control CPU 21a. A common power supply 23b is provided. In this case, it goes without saying that the hardware includes peripheral circuits (not shown) other than the CPU, power supply, and communication means.

  In the configuration of FIG. 11, the station bus communication means 23c-1 and the power source 23b are common hardware for protection and control, but the CPU and the process bus communication means are separate hardware for protection and control. It is configured as.

  The reason for separating the hardware of the protection CPU and the control CPU in this way is to meet the demand for high reliability by avoiding that both the protection function and the control function become inoperable when the CPU fails.

  The reason for separating the hardware of the process bus communication means for protection and control is that if a failure occurs in the process bus communication means, the CMU 30, the sensor unit 28 or the sensor unit 28 shown in FIG. This is because the communication function with the integrated unit 39 is lost, and both control and protection of the substation equipment cannot be performed.

  However, in the present invention, since the hardware for process bus communication means is separated for protection and control, the loss of both the protection and control functions can be avoided unless a double failure occurs. .

  The station bus communication is advantageous in that the protection function is not lost, although the substation cannot be controlled from the host system when it is defective, as compared with the CPU and process bus communication. In order to reduce costs, station bus communication may be shared by the control CPU 21a and the protection CPU 22a.

  As for the power supply, if the hardware is separated for protection and control, the operation of the other can be performed even if one of the power supplies fails, so that the reliability becomes high. However, since the power source is a heating element and the occupied space increases, it is more advantageous to share the power source for environmental resistance and miniaturization. When priority is given to environmental resistance and downsizing, the power source may be shared.

  Next, the operation of the modified example described above will be described. The communication form in this modification can be, for example, a master-slave communication system in which the station bus communication unit 23c-1 is a communication master and the control CPU 21a and the protection CPU 22a are communication slaves.

  As a specific example of the master-slave communication method, for example, data is transferred between the master and slave by memory, the memory is mounted on the slave side, and only the master side occupies the transmission path between the master and slave, and the slave For example, the read / write access to the memory is possible. In this case, the arbitration function is not required for transmission / reception control when the memory uses a dual port memory or the like that is accessible from both the slave itself and the master side.

  FIG. 11 shows a configuration example in which the station bus communication means 23c-1, the control CPU 21a, and the protection CPU 22a are connected by a bus-type communication medium 23d. Therefore, by adopting a master / slave communication system, the control CPU 21a and the protection CPU 22a are protected. Arbitration of the bus occupancy right between the CPU 22a and the station bus communication means 23c-1 becomes unnecessary, and communication processing can be simplified. In addition, it is possible to avoid the trouble of the communication on the other CPU side being unnecessarily occupied by the bus 23d unnecessarily due to the influence of one CPU failure.

  However, FIG. 11 is an example of a communication configuration when hardware is partially shared for protection and control, and is not limited to a bus-type connection. FIG. 11 is a functional configuration diagram, but does not show a physical configuration. As a physical configuration, for example, a protection function unit (a substrate on which the protection CPU 22a and the protection process bus communication unit 23c-2 are mounted), a control function unit (the control CPU 21a and the control process bus communication unit 23c-3) Configured and connected for each function by a mounted board), a station bus communication unit (board mounted with the same means), a common power supply unit (board or unit mounted with the same power supply), and a bus unit 23d (bag plane or cable). .

  Further, when this modification is applied to a twelfth embodiment described later, the control process bus communication unit 23c-3 and the protection process bus communication unit 23c-2 in FIG. It goes without saying that the communication means with the (internal bus) 45 (protection, control and hardware separation).

(Fifth embodiment)
FIG. 12 and FIG. 14 are diagrams showing a fifth embodiment of the protection control system according to the present invention, in particular, a hardware configuration diagram for explaining the configuration and functions of the protection control unit.

  In the fifth embodiment, unlike the above-described embodiment, the protection control unit 23 is composed of a line control unit 21-1 and a protection unit 22-1, and each unit has its own hardware. Software is installed so that the functions of the other unit can be performed in addition to the functions of the unit. If one unit cannot operate normally, the other unit can perform the proxy process.

  12 shows a case where a failure occurs on the protection unit 22-1 side and backup processing is performed on the line control unit 21-1, and FIG. 14 shows a case where a failure occurs on the line control unit 21-1 side. The case where backup is performed on one side is shown.

  Hereinafter, with reference to FIG. 12, it demonstrates concretely from the case where a failure arises in the protection unit 22-1 side. The protection control unit includes a control unit 21 including a line control CPU 21a that performs monitoring and control operations of the substation equipment, a control communication means 21c that performs communication between the station bus 7 and the process bus 29, and a control power supply 21b. The protection unit 22 includes a protection CPU 22a that performs protection calculation of the substation main body, a station bus 7, a protection communication unit 22c that performs communication between the process bus 29, and a protection power source 22b.

  When the protection unit 22 fails (including the case where the relay element malfunctions or malfunctions when the protection unit 22 does not operate normally), this failure is notified to the control unit 21-1 (this is the case). Called failure notification AN). By this failure notification AN, the control unit 21-1 performs a protection function.

  When the protection unit 22-1 can detect the failure and communicate with the station bus 7, the protection unit 22-1 transmits a failure notification AN to the station bus 7. The control unit 21-1 is directly designated as the transmission destination of the failure notification AN, or the control unit 21-1 is transmitted to the centralized monitoring control device 3, returned from the centralized monitoring control device 3, and the control unit via the station bus 7. Although there is a communication method to 21-1, any of these may be used, and both may be used in combination to perform double communication to increase the reliability of failure notification. Furthermore, a failure notification method may be used in broadcast communication (communication that all devices connected in the same network must receive).

  Assuming that the failure of the protection unit 22-1 cannot be detected by itself (stopping of the protection unit, etc.), the protection unit 22-1 can be detected so that other devices can detect the failure of the protection unit 22-1 as well. Make sure that other devices on the station bus 7 check the operation. For example, if a monitoring function for performing an operation check (mutual travel monitoring) between the control unit 21-1 and the protection unit 22-1 via the station bus 7 at a fixed period is incorporated, the protection unit 22-1 Can be detected by the control unit 21-1.

  In this case, since the line control unit 21-1 detects directly, the failure notification is unnecessary. In addition, an operation confirmation signal is periodically transmitted from the protection unit 22-1 to the centralized monitoring control device 3 via the station bus 7, and when this operation confirmation signal is interrupted, it is determined that the protection unit 22-1 has failed. There is also a method. When the centralized monitoring control device 3 detects this failure, it transmits a failure communication AN to the line control unit 21-1 via the station bus 7.

  The line control unit 21-1 that has received the failure notification AN or has detected the failure by any of the methods described above degenerates the monitoring and control processing as necessary to perform the protection function, and performs control The CPU 21a secures a free time for processing the protection function. FIGS. 13A and 13B show a degenerate example of monitoring and control processing.

  FIG. 6A shows a fixed calculation interval (t1 to t7) with respect to the processing time axis t of the control CPU 21a. The time tz within the calculation interval is the sum of the control processing time tx1 such as measurement and monitoring and the free time tx2. In order to perform the protection function in this state, the control function is limited as shown in FIG. 5B, and the control processing time ty2 (ty2 ≦ tx1) is reduced, so that the time ty1 of the protection relay calculation processing is reduced. Secured. However, it is needless to say that the degeneration of the control process is not necessary when the protection function can be performed within the free time tx2.

  In the case where the protection function is substituted by the line control unit 21-1, and the protection function cannot be executed due to congestion of the degenerated control calculation process, the task priority (priority level) is assigned to the control calculation process and the protection calculation process. When a high task occurs, a task with a low priority is suspended from execution and a task with a high priority is executed), and the protection calculation process may be a task with a higher priority than the control calculation process. By doing so, even if a congestion occurs in the control calculation process, the protection calculation process is not adversely affected.

  In addition, the degeneration processing described here is a method of interrupting low-importance arithmetic processing in control arithmetic processing, and is called task priority management, and the protection function is a higher priority task than the control function. Next, the control function is composed of multiple priority tasks, and the calculation and processing time of the limited control CPU 21a is assigned in the order of the most important protection function, the next most important control function, and the low priority control function. There are methods.

  Next, a case where the line control unit is backed up on the protection unit side will be described with reference to FIG. Note that the same parts as those in FIG.

  In FIG. 14, when the line control unit 21-1 fails, the protection unit 22-1 performs the control function by notifying the protection unit of failure notification AN1 or detecting the failure on the protection unit side. The failure notification method or detection method is the same as in FIG.

  The protection unit 22-1 that has received this failure notification AN1 or has detected the failure uses the free time of the protection CPU or the like (degenerates the protection function as necessary) so that the protection CPU 22a performs line control and monitoring. Process function.

An example of the calculation processing time allocation of the protection CPU 22a is shown in FIG.
In the figure, a fixed calculation interval (t11 to t17) is illustrated with respect to the processing time axis t1 of the protection CPU 22a. The time tz1 within the calculation interval is a processing time tx11 and a free time tx12 related to the protection relay.

  In this state, in order to perform the control and monitoring function, the control function is processed using the idle time tx12 as shown in FIG. In the figure, tx12 = ty12.

  When the protection unit 22 performs the line control function, if the line control function cannot be executed due to the congestion of the calculation processing related to protection, task priority is provided for the line control calculation processing and the protection calculation processing, and the line control calculation processing is performed. May be a task with a higher priority than some protection computation processes. By doing so, even if a congestion occurs in the protection calculation process, the control calculation process is not adversely affected.

  Therefore, according to the present embodiment, even when one of the line control unit or the protection unit for monitoring and controlling the substation main body fails, the other unit acts as a highly important control and monitoring function. Loss of control and monitoring functions of the power system can be avoided and highly reliable control can be realized.

  In addition, the reason why the backup (substitution) of this embodiment can be applied easily and effectively is compared with the conventional mode in which control and protection operation commands (cut-off commands) or the like are output by the contact information transfer by the one-to-one facing method. In the present embodiment having the process bus configuration, the communication means is standardized by the process bus.

  In the one-to-one facing method, it is necessary to consider a mechanism such as hardware switching so that the contact configuration on the protection unit side can be controlled, leading to an increase in cost, and the configuration is complicated and the failure rate is deteriorated. However, in the present embodiment having the process bus configuration, it is possible to cope with the proxy processing by simply changing the destination information and processing contents of the data transmitted to the process bus by software processing, and it is not necessary to consider special hardware. Therefore, substitution can be easily and effectively performed.

(Sixth embodiment)
FIG. 16 is a diagram showing the connection between the main unit, particularly the integrated unit and the sensor unit, in the sixth embodiment of the present invention.
FIG. 16 shows an embodiment in which a bay Bay, which is a protection control unit in the same electrical station, is a line line of an electrical station having a single bus configuration, and is shown in a single-phase connection diagram. In addition to the circuit breaker 25CB, a disconnector and a ground switch are installed at the terminal portion of the power transmission line 26 branched from the bus 24, although not shown. Further, current detection means (CT) 27-1 and 27-2 are arranged on the bus 24 side and the transmission line 26 side of the circuit breaker 25CB, respectively, and voltage detection means (VT) 27-3 is arranged on the transmission line 26 side. is doing.

  The current detection means 27-1 and 27-2 use, for example, a Rogowski coil, an iron core current transformer, a light conversion type current sensor based on the Faraday effect, or the like. The voltage detection means 27-3 uses, for example, a capacity-dividing type instrument transformer, a winding-type instrument transformer, a light conversion type electric field sensor based on the Pockels effect, or the like. The analog input unit of the sensor unit 28 is changed according to the detection method of the current detection means and voltage detection means used.

  As already described with reference to FIG. 2, the sensor unit 28 is installed in the vicinity of each current detection means and voltage detection means, for example, on the outer periphery of the GIS tank, and its output terminal is integrated via the communication means 38 facing 1: 1. It is connected to a unit (shown as MU in the figure) 39. The integrated unit (MU) 39 is accommodated together with the protection control unit 23 in the process control box 31 shown in FIG.

  In addition, the meaning of arranging the sensor unit in the vicinity of the current or voltage detection means here means that the sensor unit is arranged so that the electric wire connecting the current or voltage detection means and the sensor unit is as short as possible. That is.

  That is, the arrangement in the vicinity of the current or voltage detection means means that the case where the current or voltage detection means is accommodated, the case where the sensor unit is accommodated, and the other substation equipment can be mounted in a structure that does not interfere with each other. In the positional relationship, it means an arrangement in which the electric wire is made as short as possible.

  The integrated unit (MU) 39 includes an arithmetic CPU inside as shown in FIGS. 18, 20, and 24, which will be described later, and is transmitted from each of the sensor units 28-1 to 28-3. For example, the current and voltage digital signals are integrated into a transmission frame for each protection control unit, timed, and then transmitted to the protection control unit 23 and the monitoring control device 4 via the process bus 29. The digital signal transmitted from -1 to 28-3 can be subjected to sensitivity correction calculation or phase correction calculation.

  The integration of the digital signals of each current and each voltage is not limited to the integration into the transmission frame for each protection control unit, and the transmission frame is integrated between the protection control units as necessary. The combination can be selected on a case-by-case basis.

  Moreover, even when integrating for each protection control unit, the integration is not limited to one frame for one protection control unit, but two or more for one protection control unit. It may be integrated into a frame and transmitted.

  For example, although not shown, in the transformer line, the high voltage side and the low voltage side of the transformer are regarded as one protection control unit, but the high voltage side switchgear and the low voltage side switchgear are not necessarily close to each other. . In this case, for example, the high-voltage side current and voltage digital signals are integrated into one transmission frame, while the low-voltage side current and voltage digital signals are integrated into another transmission frame. A configuration for connection is conceivable.

  Needless to say, the supplementary explanation regarding the integration of the digital signals of each current and each voltage by the integration unit (MU) 39 described here is applied to all the embodiments described in this specification.

Since the communication means 38 is a digital communication line and is not easily affected by noise, an optical fiber is adopted from the viewpoint of improving noise resistance. The integrated unit 39, the protection control unit 23, and the device control unit 30 are connected by a process bus 29. The operation of the device control unit 30 is the same as the operation described in the first embodiment.
According to the sixth embodiment of the present invention having the above configuration, the following operational effects can be obtained.

  A plurality of current detection means, voltage detection means and corresponding sensor units are usually installed in the bay, and the output of each sensor unit must be connected to the protection control unit and the equipment control unit via a process bus. There is a reason. Here, instead of connecting the output of each sensor unit directly to the process bus, the number of nodes on the process bus can be minimized by integrating the minimum number of transmission frames in the integration unit, and Since a plurality of electric quantities in the bay can be transmitted with a minimum necessary transmission frame, the process bus can be configured efficiently.

  Further, since the sensor unit is arranged in the vicinity of each current detection means and each voltage detection means, and the electric quantity is converted into a digital value in the vicinity of the current detection means and the voltage detection means, the current detection means having a small secondary output. Even when the voltage detecting means is used, a high-quality electric quantity can be transmitted to the device control unit and the protection control unit without being affected by noise.

  When the device to be protected in the bay is a device having a three-phase collective configuration, for example, the sensor unit 28-1 corresponding to the current detection unit 27-1 of each phase in FIG. 16 is configured as a sensor unit common to the three phases. May be. Similarly, the current detection unit 27-2 and the voltage detection unit 27-3 may be configured by a sensor unit common to three phases.

  In this case, as a matter of course, the sensor unit has three or more input terminals, and the sensor unit digitally converts AC electric quantities of three phases or more and integrates digital values of three phases or more, Transmit to the integration unit 39.

  Further, if possible, the sensor unit 28-2 and the sensor unit 28-3 may be integrated to form a single sensor unit. In addition, even if the device has a single-phase configuration, if possible, the sensor unit corresponding to the current detection means of each phase may be configured as a sensor unit common to three phases.

  As described above, it is not always necessary to correspond one sensor unit for each current detection means and each voltage detection means, and if possible, sensor units corresponding to a plurality of current detection means and voltage detection means. A system configuration may be used.

(Seventh embodiment)
FIG. 17 shows the main part of the seventh embodiment of the present invention, and particularly shows the coupling relationship between the integrated unit and the sensor unit.

  In FIG. 17, since the main functions of the protection control unit 23, the integration unit 39-1 and the sensor units 28-1 to 28-n have already been described, the present embodiment focuses on the functions of sampling synchronization and timing in the sensor unit. Explained.

  The integrated unit 39-1 outputs digital data corresponding to the extracted current or voltage of the substation main body output from the sensor units 28-1 to 28-n through the communication paths 38-1 to 38-n of the one-to-one facing method. As described above, for example, it has a function of capturing data via a network, integrating it into a transmission frame for each protection control unit, and assigning a time to the process bus 29 for transmission.

  And in this embodiment, in order to implement | achieve this function, the integrated unit 39-1 inputs the GPS signal received with the GPS receiver 41 (GPS: Global Positioning System), and time-synchronizes from this GPS signal. The reference signal and the reference time data are extracted and generated.

  The time synchronization reference signal and the reference time data are transmitted to the sensor units 28-1 to 28-n via a dedicated one-to-one facing communication path 40. The sensor units 28-1 to 28-n are synchronized with the time synchronization (sampling synchronization and sampling time) of the AC electric quantity extracted from the main circuit of the substation main body by the time synchronization reference signal and the reference time data taken from the one-to-one communication path 40. Time setting).

  FIG. 18 shown next is a diagram illustrating an example of the configuration of the integrated unit 39-1. In FIG. 18, 39e is a sensor unit data integration means for capturing data by one-to-one facing communication with the plurality of sensor units 28-1 to 28-n, and 39a is a process bus that communicates with the upper protection control unit 23. It is a communication means.

  The output signal of the GPS receiver 41 described above (an example is shown by a waveform WV1 in FIG. 28 described later) is input to the reference signal input means 39d and processed. The time synchronization reference signal (high-accuracy 1-second pulse signal) and the reference time data (absolute time) for each 1-second pulse extracted by the reception process of the reference signal input means 39d are distributed via the transmission line 39g. Input means 39c.

  The reference signal distribution means 39c distributes and transmits the time synchronization reference signal and the reference time data for each one-second pulse to the sensor units 28-1 to 28-n via the dedicated one-to-one communication path 40. . The CPU 39b controls the process bus communication means 39a, the sensor unit data integration means 39e, and the distribution means 39c via the internal bus 39f, and performs communication protocol conversion from the sensor units 28-1 to 28-n to the protection control unit 23. To do.

  In the present embodiment, the synchronization and timing of the electric quantities that are captured by the plurality of sensor units 28-1 to 28-n and converted into digital values are performed for each sensor unit 28-1 to 28-n. Thereby, digital data (with time) synchronized between the sensor units 28-1 to 28-n can be provided. The configuration example of the sensor unit itself has already been shown in FIG.

  Next, a modification example in which the one-to-one facing communication path 40 is omitted from the above-described embodiment will be described with reference to FIG. In the case of this embodiment, the integrated unit 39-2 and the sensor units 28b-1 to 28b-n have the following relationship.

  In other words, the integrated unit 39-2 receives the digital outputs of the n sensor units 28b-1 to 28b-n via the one-to-one facing communication path 38 and outputs an output signal from the GPS receiver 41. (GPS signal) is input, and a reference signal input function for extracting a time synchronization reference signal and reference time data from the GPS signal is provided. Further, the extracted time synchronization reference signal and reference time data are stored in the one-to-one relationship. The data is transmitted to the sensor units 28b-1 to 28b-n through the communication path 38 of the opposite method.

  Thereby, time synchronization (sampling synchronization and time assignment) is performed by the sensor units 28b-1 to 28b-n with respect to the amount of electricity of the main circuit AC in the substation main body. Note that the use of GPS reception data does not limit the present invention, but is merely an example.

  Next, the features of FIG. 19 will be described. This figure is different from FIG. 17 in that transmission / reception between the integrated unit 39-2 and the sensor units 28b-1 to 28b-n is performed by one communication path 38, and other functions and operations are shown in FIG. Since it is the same as that of the case of 17, only a different part is demonstrated.

  In the embodiment of FIG. 19, digital data is transmitted from the sensor units 28b-1 to 28b-n to the integrated unit 39-2 through the one-to-one opposing communication path 38, and the integrated unit 39-2 is transmitted through the communication path 38. Since the time synchronization reference signal and the reference time data are transmitted from the sensor unit 28b-1 to the sensor unit 28b-n, the communication path 38 can be a serial communication path, thereby reducing the cable wiring space.

  In this case, data transmission / reception on the communication path 38 is bidirectional communication. This is so-called half-duplex communication or the like. When bi-directional communication is performed using a serial medium, it is necessary to arbitrate data communication in order to avoid collision of transmission / reception data.

  In the case of the present embodiment, in order to perform sampling synchronization and time setting of the electric quantity of the substation equipment in the sensor units 28b-1 to 28b-n, the time synchronization reference signal and the reference time data are reliably transmitted at a predetermined timing. Therefore, it is essential to transmit from the integrated unit 39-2 to the sensor units 28b-1 to 28b-n without delay.

  For this reason, it is necessary for the integrated unit 39-2 to have priority to transmit / receive the communication path 38. For example, the integrated unit 39-2 is a master (master station), and the sensor units 28b-1 to 28b-n are slaves (slave stations). In this master / slave method, the master side polls the slave side to inquire whether there is a transmission request from the slave side, and when the master side can receive it, it transmits a transmission permission signal to the slave side and transmits this transmission permission signal. After that, the master is ready to receive.

  Since the slave side that has received this transmission permission signal has obtained the transmission right, the slave side serially transmits the digital value of the electrical quantity of the substation main body to the master. On the contrary, the master side can always send data to the slave except when waiting for reception. As a result, the integrated unit 39-2 can reliably transmit the time synchronization reference signal and the reference time data to the sensor units 28b-1 to 28b-n without delay, and polls the idle time of this transmission interval at a predetermined cycle. Digital data of the electric quantity of the substation main body is received from the sensor units 28b-1 to 28b-n.

  When the GPS receiver 41 is used, the time synchronization reference signal and the reference time data may have a 1-second cycle. This is sufficiently longer than the period (for example, an electrical angle of 7.5 degrees such as 2400 Hz, 2880 Hz, etc.) for sampling the amount of electricity of the substation main body by the sensor unit 28b-1 to sensor unit 28b-n. There is no problem in the integration unit 39-2 receiving the digital data.

  Also, instead of the polling system, the slave side sensor units 28b-1 to 28b-n are provided with a dual port memory or the like, and this memory is used as an interface, and the sensor units 28b-1 to 28b-n have the memory inside the unit. The integrated unit 39-2 on the master side uses the communication path 38 exclusively to read the data on the memory, thereby taking in the digital data of the electrical quantity of the substation main body. Can do.

  Further, the time synchronization reference signal and the reference time data are transmitted from the integrated unit 39-2 to the sensor units 28b-1 to 28b-n, and the sensor units 28b-1 to 28b-n that have received this data receive the time synchronization reference signal. There is also a method of processing the signal as an interrupt signal and the reference time signal as serial reception data.

  This method can be achieved by the master unit 39-2 occupying the communication path 38 for both transmission and reception. The detailed configuration of the integrated unit 39-2 employed in the embodiment of FIG. 19 is, for example, the configuration shown in FIG.

  The difference between the integrated unit 39-2 shown in FIG. 20 and FIG. 18 is that the reference signal for time synchronization and the reference time data are obtained by eliminating the one-to-one facing communication path 40 from the reference time distribution means 39c-1. It is in the point which outputs to the sensor unit data integration means 39e-1 via the transmission line 40-1 inside the integration unit 39-2. The sensor unit data integration means 39e-1 is equipped with the communication arbitration function described above.

  The configuration of the sensor units 28b-1 to 28b-n employed in this embodiment is, for example, the configuration shown in FIG. The difference from FIG. 3 (a) is that the one-to-one facing communication path 40a that takes in the reference signal for time synchronization and the reference time data is eliminated, and the half-duplex in which the input / output means is one communication path 38-1. The input / output means 28b-g for transmitting / receiving serial communication is. The power supply is not shown. In this case, sampling synchronization and timing are controlled among the sampling synchronization input circuit 28d, the synchronization means 28b-a and the CPU 28f via the internal bus 28e.

  According to the two embodiments described above, even in the configuration of the present invention in which the analog input circuit is separated from the conventional line control device and protection device, time synchronization of the analog input is possible, and particularly high accuracy is required. Protection relay calculation is possible. In addition, since the time synchronization (sampling synchronization and time setting) is performed by the sensor unit including the analog input circuit, the most stable time synchronization can be realized.

  Furthermore, since the synchronization data with time is processed by the sensor unit, a slight delay can be allowed between the integrated unit and the protection control unit, and even if a general purpose Ethernet etc. whose communication speed is affected by the traffic state is used, the process bus 29 can be configured, and flexibility such as expansion of the apparatus between the process level and the bay level is also increased.

  In addition, since GPS data is used as a reference within a substation or between substations, the same reference signal can be handled at the same time within a substation or between substations. Therefore, time synchronization within a substation or between substations can be performed with high accuracy and ease.

  In the present embodiment, the GPS data is used for time synchronization as a common reference signal in the system of the sixth embodiment shown in FIG. 16. However, the GPS data is not used, but for example, a reference It goes without saying that a signal and time generator may be provided and treated as a common reference signal between the system and substations.

  In addition, communication between the integrated unit and the sensor unit can be connected by a half-duplex serial communication using a common serial cable. In this case, it is not necessary to use so-called full-duplex communication that separates transmission and reception. Can be halved, which is effective in reducing cost and cable wiring space.

  Needless to say, this embodiment can be applied to time synchronization (sampling synchronization and timing) of the integrated unit and the sensor unit of the embodiments described in all claims.

(Modification of the seventh embodiment)
Since the main functions of the protection control unit, the integrated unit, and the sensor unit have already been described in the embodiment described above, the functions in this modification will be mainly described below.

  This modification is the same as the seventh embodiment (system configuration) and the configuration of the integrated unit (including the point of using data such as GPS).

  The difference is in the sharing of functions of sampling synchronization and timing with respect to the amount of electricity of the main circuit AC of the substation main body in the integrated unit 39 and the sensor units 28-1 to 28-n. Therefore, only different parts will be described.

  Only the time synchronization reference signal is transmitted from the integrated unit 39 to the sensor units 28-1 to 28-n via the communication path 40. A specific example of this time synchronization reference signal is the signal SPT shown in FIG.

  A specific example of the signal that is the source of the signal SPT is a waveform WV1 shown in FIG. The details of the signal SPT and the waveform WV1 have been described in the corresponding portions of the tenth embodiment.

The processing on the sensor unit side 28-1 to 28-n is limited to the sampling synchronization of the procedure S2 and the procedure S3 shown in FIG. By this sampling synchronization, the digital value data of the electric quantity (current or voltage) of the main circuit AC of the substation main body in which the sampling synchronization is established between the sensor units 28-1 to 28-n is transmitted to the integrated unit 39.
The process on the integrated unit side is a time-setting process S4 shown in FIG.

  As described above, the sensor unit and the integrated unit share the functions of sampling synchronization and timing.

  In the protection control unit 23 coupled to the integrated unit 39 by the process bus 29, the time-sequential electric quantity (digital value) obtained by sampling synchronization is taken from the integrated unit 39, and monitoring, control, and protection of the substation main body are performed.

  In this modification as well, the point-to-point communication path 40 between the integrated unit 39 and the sensor units 28b-1 to 28b-n is deleted as in the other embodiments described in the seventh embodiment. Performing transmission / reception data on all 19 communication paths 38 using a common communication medium (serial bus) corresponds to another embodiment of this modification.

  According to this modification, time synchronization of analog inputs separated from the conventional line control device and protection device is possible. As a result, it is possible to perform a protection relay operation that requires high accuracy. In addition, since the sampling synchronization is performed by the sensor unit having an analog input circuit, the most stable sampling synchronization is realized.

  The time is handled by the integrated unit. Therefore, a slight delay can be allowed between the integrated unit and the protection control unit, and the process bus 29 can be configured even by using a general-purpose Ethernet or the like whose communication speed is affected by the traffic state. Flexibility such as device expansion is also increased. In addition, since time is not required in the sensor unit, the processing load of each sensor unit and the amount of transmission to the integrated unit can be suppressed due to the system configuration.

  Furthermore, since GPS data is used as a reference within a substation or between substations, the same reference signal can be handled at the same time within a substation or between substations. Therefore, time synchronization within a substation or between substations can be performed with high accuracy and ease.

  In this modification, the GPS data is used as the common reference signal of the system according to claim 1 for time synchronization. However, the GPS data is not used. For example, the reference signal and the time generator are used. Needless to say, this may be treated as a common reference signal between the system and the substation.

  In addition, communication between the integrated unit and the sensor unit can be connected by a half-duplex serial communication using a common serial cable. In this case, it is not necessary to use so-called full-duplex communication that separates transmission and reception. Can be halved, which is effective in reducing cost and cable wiring space.

  In addition, it cannot be overemphasized that this modification is applicable about the time synchronization (phase synchronization and time-setting) of the integrated unit and sensor unit of embodiment of the content described in all the claims.

(Eighth embodiment)
FIG. 22 is a diagram showing an eighth embodiment of a protection control system according to the present invention, and particularly a diagram showing a configuration of a main part.

  In FIG. 22, the main functions of the protection control unit 23, the integration unit 39-3, and the sensor units 28c-1 to 28c-n are almost the same as those of the embodiment already described, and therefore, the functions that are characteristic of the embodiment will be mainly described.

  As shown in FIG. 22, in the present embodiment, the one-to-one facing communication path 40 that transmits the time synchronization reference signal from the integrated unit 39-3 to the sensor units 28c-1 to 28c-n is omitted. Instead, a specific sensor unit (for example, sensor unit 28c-1) of the sensor units 28c-1 to 28c-n is common to other sensor units (for example, sensor unit 28c-2 to sensor unit 28c-n). The synchronization reference signal is distributed via the dedicated communication path 40-2.

  All the sensor units 28c-1 to 28c-n share this synchronization reference signal (such as a pulse signal for notifying a certain period), and the synchronization means 28a shown in FIG. 3) using the sampling signal generated by dividing the clock oscillation frequency equipped in the sensor unit and the reference signal for synchronization in step S2 in FIG. Processing corresponding to S3 is performed.

  An example of the reference signal for synchronization is equivalent to the signal SPT shown in FIG. The description of the signal SPT is given in the corresponding explanatory text of the tenth embodiment.

  The process on the side of the integrated unit 39-3 is the same as the timing process S4 shown in FIG. The configuration of the integrated unit 39-3 in FIG. 20 is the same as the configuration in which the communication path 40-1, the reference signal distribution means 39c-1, and the transmission path 39g are removed and the internal bus 39f and the reference signal input means 39d are connected.

  In this case, the reference signal for time synchronization and the reference time data extracted by the reference signal input means from the signal input from the GPS receiver 41 (a specific example of the signal input by the reference signal input means corresponds to the waveform WV1 shown in FIG. 28). WV1 is described in the corresponding description of the tenth embodiment.) Is processed by the CPU 39b, and the sensor unit data integration means 39e-1 through the sensor units 28c-1 to 28c-n synchronize with “transformers”. The main circuit AC electric quantity (digital value) of the main body is taken in and timed. The time setting method is the process S4 in FIG.

  As described above, sampling synchronization and timing are shared by the integrated unit 39-3 and the sensor units 28c-1 to 28c-n.

  In the protection control unit 23 coupled to the integrated unit 39-3 by the process bus 29, the “electrical quantity (digital value) of the main circuit alternating current of the substation main body” with the time synchronized with the sampling from the integrated unit 39-3 is obtained. Capturing, monitoring, controlling and protecting substation equipment.

  In the above description, an example in which a reference signal for sampling synchronization in a sensor unit is distributed from a specific sensor unit to other sensor units has been described. However, as a modification, a common signal generator is used in a substation or between substations. There may be a configuration in which the synchronization reference signal generated by the signal generator is transmitted to each sensor unit. It goes without saying that a GPS receiver may be used for this signal generator. According to this embodiment, even in the configuration of the present invention in which the analog input circuit is separated from the conventional line control device and protection device, analog input time synchronization is possible.

  As a result, it is possible to perform a protection relay operation that requires high accuracy. In addition, since the sampling synchronization is performed by the sensor unit having an analog input circuit, the most stable sampling synchronization is realized.

  Since the time is processed by the integrated unit, a slight delay can be allowed between the integrated unit and the protection control unit, and the process bus 29 can be configured even by using a general-purpose Ethernet whose communication speed is influenced by the traffic state. In addition, flexibility such as expansion of equipment between the process level and the bay level is increased.

  In addition, since time is not required in the sensor unit, the processing load of each sensor unit and the amount of transmission to the integrated unit can be suppressed due to the system configuration.

  In addition, a dedicated communication means for distributing a signal necessary for sampling synchronization from the integrated unit to the sensor unit becomes unnecessary, and a large number of dedicated cables between the sensor unit and the integrated unit can be reduced.

  Further, in the present embodiment, as in the seventh embodiment, the time in the integrated unit is based on the GPS data in the substation or between substations, so that the same time in the substation or between substations is the same. Can handle. Therefore, the timing within the substation or between the substations can be easily performed with high accuracy.

  In this embodiment, the GPS data is used as a reference time data common to the substation protection control system for time setting. However, the GPS data is not used, but a reference signal and a time generator are used. Needless to say, this may be treated as a common reference signal between the system and the substation. Needless to say, this embodiment can be applied to time synchronization (phase synchronization and timing) of the integrated unit and sensor unit of the other embodiments described above.

(Ninth embodiment)
A ninth embodiment of the present invention will be described with reference to FIGS. FIG. 23 is a diagram showing a ninth embodiment of a substation protection control system according to the present invention, and is a configuration diagram for explaining in particular the main part.

  Note that the protection control unit 23, the integrated unit 39-4, and the sensor units 28d-1 to 28d-n are already described embodiments, and their main functions have already been described. Therefore, the functions unique to this embodiment will be mainly described. .

  As can be seen from FIG. 23, the transmission path 40-2 that has transmitted the synchronization reference signal between the sensor units shown in FIG. 22 of the eighth embodiment is deleted in this embodiment. In the present embodiment, the integrated unit 39-4 employs a configuration example shown in FIG.

  Compared with FIG. 20, FIG. 24 equips the integrated unit 39-4 with the synchronization means 39h and is connected to the CPU 39b by the internal bus 39f. In other words, the integration unit 39-4 is configured to perform all sampling synchronization and timing of the electric quantity of the main circuit of the substation main body.

  For this reason, the n sensor units 28d-1 to 28d-n connected to the integrated unit 39-4 do not require synchronization between the sensor units, and the A / D of the electric quantity sampled by each sensor unit. The converted data (digital value) is transmitted to the one-to-one communication path 38.

  That is, the sensor units 28d-1 to 28d-n according to the present embodiment need only have a function of transmitting A / D conversion data of the electric quantity of the main circuit of the transformer device main body. The synchronizing means 28a and CPU 28f of the constituent circuit can be deleted. Accordingly, the sensor unit has a very simple hardware configuration.

  The CPU 28f means that a control LSI equivalent to a high-precision CPU is not required, and it may be necessary to mount a minimum control means for controlling the sampling synchronization input circuit 28d and the output means 28g.

  Next, a specific example of a method for performing sampling synchronization and time setting in the integrated unit 39-4 will be described. As a first method, a reference signal for synchronization is added to A / D conversion data (digital value) of the electric quantity sampled from a specific sensor unit of the sensor units 28d-1 to 28d-n, and one-to-one facing communication is performed. Transmit to path 38. Based on the synchronization reference signal, the digital output synchronization correction of the sensor units 28d-1 to 28d-n is performed.

  In the integrated unit 39-4 that has taken in the reference signal for synchronization, this signal is used as a reference signal for synchronization with the digital data from the sensor units 28d-1 to 28d-n, and the procedures S2 and S3 shown in FIG. Used as a substitute for the time synchronization reference signal. It goes without saying that step S4 uses a time synchronization reference signal extracted from data such as GPS.

  A specific example of the time synchronization reference signal and the reference time signal captured from the GPS receiver by the integrated unit 39-4 is the waveform WV1 shown in FIG. The description of the waveform WV1 is given in the corresponding explanatory text of the tenth embodiment. In the present embodiment, since the digital data from the sensor unit is sampled asynchronously, the complementary processing procedure S1 shown in FIG. 3B is also performed as necessary.

  The feature of the first method described above is that a reference signal for synchronization is added to the digital data of the amount of electricity transmitted from the sensor units 28d-1 to 28d-n to the integrated unit 39-4. This synchronization reference signal does not particularly limit the sine wave, rectangular wave, and frequency.

  As an example of the reference signal for synchronization, a case will be described in which a fundamental wave with respect to an analog electric quantity of a main circuit AC current or voltage in a transformer main body is described. The analog input means 28b shown in FIG. 3A is provided with one port for a fundamental wave input channel (a channel dedicated to fundamental wave input). This fundamental wave is processed by the sampling synchronous input circuit 28d in the same manner as other analog electric quantities, and transmitted to the one-to-one facing communication path 38 by the output means 28g. In the present embodiment, each sensor unit does not need the synchronization means 28a shown in FIG.

  In the case of one-to-one facing communication constituted by a serial link, as shown in FIG. 25, in each channel (channel 1: CH1, channel 2: CH2,... Channel n: CHn, for example, channel n is set as a fundamental channel) ) Digital data is sequentially output. The integrated unit 39d captures this data, and performs synchronization processing of the electrical quantities (digital values) of all the channels captured from all the sensor units 28d-1 to 28d-n with reference to the fundamental wave.

  FIG. 26 is a waveform diagram showing the electric quantity of each channel of the sensor unit captured by the integrated unit 39-4. Of these, the waveform showing the electric quantity of an arbitrary channel of the sensor unit 28d-1 is Sf100, and the sensor unit 28d. −2 is assumed to be Sf101, and the waveform indicating the fundamental channel electrical quantity (synchronization reference signal) of the sensor unit 28d-n is assumed to be Sf10n.

  Waveform Sf100 and Waveform Sf101 are matched to the phase of waveform Sf10n, which is the reference signal for synchronization. As a conceptual diagram), the electric quantity data of the waveform Sf100 and the waveform Sf101 is phase-corrected. Timing for the phase-corrected quantity of electricity follows step S4 in FIG.

  In the first method, a synchronization reference signal is added from a specific sensor unit. However, a plurality of sensor units to which the synchronization reference signal is added are allowed. If there are a plurality of sensors, even if the sensor unit of one device breaks down, the rephase correction can be performed with the reference signal for synchronization from the other sensor units.

  As a second method, there is a method of matching the phases of other electric quantities with reference to the waveform of the electric quantity having the largest phase delay among the digital outputs of the sensor units 28d-1 to 28d-n. Sampling is synchronized in the above specific example, and the time is assigned in step S4 of FIG. 3B based on the time synchronization reference signal and the reference time data extracted from the GPS signal or the like.

  The protection control unit 23 coupled to the integrated unit 39-4 via the process bus 29 takes in the time-synchronized electricity (digital value) obtained by sampling synchronization, and performs monitoring, control and protection of the substation main body.

  Therefore, according to the present embodiment, the analog input time can be synchronized although the analog input circuit is separated from the conventional line control device and protection device. As a result, it is possible to perform a protection relay operation that requires high accuracy.

  Timekeeping is handled by the integrated unit. Therefore, a slight delay can be allowed between the integrated unit and the protection control unit, and the process bus 29 can be configured even by using a general-purpose Ethernet or the like whose communication speed is affected by the traffic state. Flexibility such as device expansion is also increased.

  Since the sampling synchronization processing is also performed by the integrated unit, the sensor unit does not require a circuit for sampling synchronization, a CPU for performing high-speed calculations, etc., and the sensor unit converts analog data into a digital value and drips to the integrated unit. The hardware scale of the sensor unit can be reduced.

  In this system configuration, a large number of sensor units are often installed near or in the vicinity of the substation main body with respect to the protection control unit and the integrated unit. By reducing the hardware scale of the sensor unit, the failure rate of the sensor unit and the system can be suppressed and the cost can be reduced.

  In addition, since time is not required in the sensor unit, the processing load of each sensor unit and the amount of transmission to the integrated unit can be suppressed due to the system configuration. Furthermore, since GPS data or the like is used as a reference within a substation or between substations, the same time can be handled within or between substations, and time synchronization within or between substations can be performed with high accuracy and ease.

  In this embodiment, the GPS data is used as the common reference signal of the system according to claim 1 for time synchronization. However, the GPS data is not used. For example, the reference signal and the time generator are used. Needless to say, this may be treated as a common reference signal between the system and the substation.

  Furthermore, it goes without saying that the present embodiment can be applied to time synchronization (phase synchronization and timing) of the integrated unit and sensor unit of the other embodiments described above.

(Tenth embodiment)
Next, a tenth embodiment of the present invention will be described with reference to FIGS. FIG. 27 is a main part configuration diagram showing a tenth embodiment of a substation protection control system according to the present invention.

  Since the protection control unit, the integration unit, the sensor unit, and the device control unit have been described in the above-described embodiments, their main functions have been described. Therefore, the functions specific to this embodiment will be mainly described here.

  In FIG. 27, the integrated unit 39 inputs a reference signal for time synchronization from the GPS receiver 41, and receives a signal SPT (sampling synchronization of the electric quantity of the main circuit alternating current of the substation main body and highly accurate time setting (1 microsecond). Signal) to the sensor units 28-1 to 28-n, and the time reference signal SOE for the state event of the substation main body from the reference signal of the GPS receiver 41 is transmitted to the device control unit 30. -1 to 30-n are distributed to the protection control unit 23 and the device control units 30-1 to 30-n via the process bus 29.

  For example, in a gas circuit breaker, the state event of the substation main body is gas pressure, temperature, oil pressure, switch opening / closing state, switching operation, device failure (such as an alarm for a hydraulic pump), and the like. Although these are items subject to monitoring and control, the time for monitoring and control status (status event) needs to be high-accuracy compared to the protection function that determines accidents etc. from the main circuit electricity of the transformer equipment. And not.

  In the protection function such as accident determination, the time synchronization of the amount of electricity usually requires an accuracy of about 1 microsecond, but the status events for monitoring control (main machine operation status, etc.) of the substation equipment are accurate to 1 millisecond. It is enough. When the process bus 29 is a two-way communication such as a LAN, the protection control unit 23, the integration unit 39, and the device control units 30-1 to 30-n are connected to the process bus 29. The communication time varies, and a certain time is not guaranteed. For this reason, it is not suitable for time data distribution of 1 microsecond, but if it is on the order of 1 millisecond, it is possible to take into account communication delays and variations.

  A signal SOE serving as a reference for timing of 1 millisecond is transmitted from the integrated unit 39 to the device control units 30-1 to 30-n via the process bus 29. In the device control units 30-1 to 30-n, the state event of the substation device is timed by the reference signal SOE.

  FIG. 28 is a diagram illustrating an example of a relationship between a time synchronization reference signal and time data. The reference signal WV1 transmitted from the GPS receiver 41 to the integrated unit 39 is, for example, a signal in which time data TIME is superimposed on a pulse signal every second. The pulse interval TI1 (from TP1 trigger to TP1-1) is a highly accurate 1 second period. Time data TIME such as GPS absolute time is superimposed between the 1-second pulses, and the integrated unit 39 generates a high-precision 1-second interrupt from the reference signal WV1 and extracts the time serial data TIME.

  In the seventh embodiment described above, a method of distributing the reference signal WV1 as it is to the sensor units 28-1 to 28-n is taken, and in the modified example of the seventh embodiment, the time data TIME is removed. A method of delivering a high-accuracy 1-second interrupt signal (reference signal) SPT to the sensor units 28-1 to 28-n is used.

  When the integration unit 39 and the sensor units 28-1 to 28-n are configured as one-to-one facing serial transmission or the like, there is no signal collision, the reference signal SPT can be distributed at high speed, and there is little variation in distribution time.

  In this case, the delay (fixed time) of the serial communication time is TD2 (= TD2-1), and the variation in this delay is less than 1 microsecond. There is no problem in accuracy as a reference signal for use.

  Next, the reference signal SOE will be described. When the process bus 29 is, for example, a bidirectional serial bus (LAN or the like) for packet transmission, the packet signal SOE with time is transmitted from the integrated unit 39 to the device control unit 30- at the timing of TP1 and TP1-1 via the process bus 29. 1-30-n. In packet transmission such as a LAN, collision of packet data occurs, and depending on the traffic, the delivery time delay and variation of the timed packet SOE occur.

  In this case, the delay time of delivery of the process bus 29 varies from the SOE1 and SOE1-1 reception timing of the packet SOE and the time between the timings TP1 and TP1-1 to TD3 (≠ TD3-1). The accuracy drop of about several hundred microseconds is expected for the cycle TI1 and the one-second cycle TI3 received by the device control units 30-1 to 30-n. However, this level of accuracy degradation is at a level where there is no problem with accuracy in the timing of the state event.

  According to the present embodiment, even when the process bus is configured by a bidirectional serial bus such as a LAN, the timing of the status event can be performed with this configuration. Also, when distributing status event time reference signals from an integrated unit to multiple device control units via a common process bus, there is no need to install multiple distribution communication cables, etc., and a status event timing system can be provided at low cost. Can be configured.

  The technology for distributing the status event reference signal from the integrated unit described in the present embodiment to the device control unit and timing the status event by the device control unit is the same for the integrated unit and the device control unit of the other embodiments. Needless to say, this is also applicable.

(Eleventh embodiment)
FIG. 29 is a diagram showing an eleventh embodiment of a substation protection control system according to the present invention, and particularly a diagram showing a relationship between a substation main body and a sensor unit. This embodiment is a partial modification of the embodiment of FIG. 16 and differs greatly from FIG. 16 in that an integrated unit 39 for integrating the outputs of the sensor units 28 is provided in FIG. In the embodiment, the analog data detected from the current detection means 27-1, 27-2 and the voltage detection means 27-3 is guided to the common sensor unit 28 'through the analog circuit 38', and the digital data is obtained by the sensor unit 28 '. In other words, the data is transmitted to the process bus 29.

  In the case of this embodiment, the sensor unit 28 ′ is housed together with the protection control unit 23 in the process control box 31, for example. Each current detection means, each voltage detection means, and the sensor unit 28 are connected by the analog circuit 38 'as described above, and the sensor unit 28, the protection control unit 23, and the device control unit 30 are connected by the process bus 29. .

  The substation equipment protection control system of the eleventh embodiment having the above configuration performs the following operation. The outputs of the current detection means 27-1 and 27-2 and the voltage detection means 27-3 are transmitted as analog electrical signals to the sensor unit 28 installed in the vicinity of the protection control unit 23.

  The sensor unit 28 converts the input analog electric signal of each current and each voltage into a digital value, integrates these into a transmission frame for each protection control unit, for example, and time-protects the protection control via the process bus 29. Transmit to the unit 23. It should be noted that by incorporating a calculation CPU in the sensor unit, it is possible to perform sensitivity correction calculation of current and voltage information converted into digital values, or to perform phase correction calculation.

  Needless to say, the contents of the supplementary explanation of the data integration by the integration unit (MU) described in the description of the sixth embodiment can be applied to the data integration by the sensor unit described in the present embodiment. That is, the data integration by the sensor unit is not limited to the integration into the transmission frame for each protection control unit.

  According to the substation equipment protection control system of the eleventh embodiment having the above configuration, the following effects can be obtained.

  Application of this configuration is, for example, using an iron core current transformer, and the secondary outputs of the current detection means and the voltage detection means are relatively large, and a relatively long distance can be obtained with an analog electric quantity without being affected by noise. Although it is limited to the case where transmission is possible, it is only necessary to arrange at least one set of sensor units for each bay (note that it may be desirable to arrange two or more sensor units such as a transformer line if necessary). .

  As a result, since the number of nodes can be minimized in the process bus connecting the sensor unit, device control unit, and protection control unit in the bay, the system is more economical than when an integrated unit is applied. Can be built. In addition, since a plurality of electric quantities in the bay are transmitted in the minimum necessary transmission frame, the process bus can be efficiently configured as in the sixth embodiment.

(Twelfth embodiment)
Next, a twelfth embodiment of a substation protection control system according to the present invention will be described with reference to FIGS.

  FIG. 30 shows the functions of the protection control unit (PCU) 23, the integrated unit (MU) 39, the newly provided device control unit communication means (CMU communication means) 42, and the process bus communication means 43 on the printed circuit board. The printed circuit boards are mounted and connected by a parallel bus (internal bus) 45 provided on the back board on the back surface of the collective case 44.

  FIG. 31 shows each of the printed circuit boards of the protection control unit (PCU) 23, the integrated unit (MU) 39, the device control unit communication means (CMU communication means) 42, and the process bus communication means 43 one by one in the collective case 44. FIG. The collective case 44 may be stored in the process control box 31, or the process control box 31 itself may be used as the collective case 44.

  Returning to FIG. 30, the device control unit communication means (CMU communication means) 42 is a device control monitor which is an upward signal communicating from the device control units (CMU) 30 a-1 to 30 a-n to the protection control unit (PCU) 23. Data (for example, electrical quantity data of the system controlled by the monitoring control target device taken in by the device control unit, operation state data of the monitoring control target device, sensor output signal attached to the monitoring control target device, etc.) and downstream signal This relays control signals (such as a breaker command to the circuit breaker) communicated from the protection control unit 23 to the device control units 30a-1 to 30a-n.

  The integration unit (MU) 39 has a function of integrating the amount of electricity rising from each sensor unit (SU) 28-1 to 28-n into a frame for each protection control unit, for example, and transmitting it to the parallel bus 45.

  On the other hand, the process bus communication means 43 relays communication between the parallel bus 45 and the process bus 29 and converts a communication protocol. If necessary, the process bus communication means 43 passes through a bus arbitration device such as the switching hub 29-2. Thus, they are connected to the lower integrated unit 39 and the device control units 30-1 to 30-n, and further connected to an integrated unit, a device control unit, a protection control unit or the like in another bay (not shown). When performing busbar protection, information on the amount of electricity in other bays is required, and data transmission / reception with other bays is performed via the process bus 29.

  In addition, in order to perform data transmission / reception with the protection control unit, the integration unit, the device control unit, and the like, it is necessary to specify a destination. In this case, it may be specified by a predetermined flag bit of transmission data. Note that transmission / reception control to the device control units 30a-1 to 30a-n is performed by the device control unit communication means 42.

  As described above, in the present embodiment, the protection control unit PCU23, the integrated unit MU39, the device control unit communication unit 42, and the process bus communication unit 43 are connected to the parallel bus 45 by the backboard in one collective case 44. Since it is configured, the process bus configuration scale can be reduced and the process case can be compactly accommodated in the collective case 44, so that it is easy to secure the installation space of the collective case 44 and the most suitable for a form of installation near the substation main body or the main body. It can be said that.

  In addition, when the protection control unit 23, the integration unit 39, the device control unit communication means 42, and the process bus communication means 43 are configured by boards, there is a maintenance advantage that only the corresponding board can be replaced when each board fails. In addition, when the functions of a plurality of units are mounted on the same board, the number of boards can be reduced and the number of circuit parts can be reduced, and there is an advantage that the failure rate can be reduced, the cost can be reduced, and the size can be reduced. .

  Further, the protection control unit PCU23, the integration unit 39, the device control unit communication means 42 and the process bus communication means 43 are connected to the parallel bus 45 so that the protection control unit 23 is integrated for monitoring, control and protection. When capturing digital data from the unit 39, only the parallel bus 45 is used and the process bus 29 is not used at all. As a result, the communication traffic load on the process bus 29 can be extremely reduced.

  If all information is exchanged between the integrated unit 39 and the protection control unit 23 through the process bus (bidirectional bus: CSMA / CD LAN serial transmission path, etc.) without using the parallel bus, the process Even if the traffic load on the bus increases and the protection control unit 23 issues a trip command for the circuit breaker to the device control unit via the process bus 29 due to an accident in the main body of the transformer, the traffic load on the process bus Then, there is a possibility that the circuit breaker cannot be tripped within a predetermined time.

  However, in the present embodiment, since transmission / reception between the protection control unit 23 and the device control units 30a-1 to 30a-n is performed via the parallel bus 45 and the device control unit communication means 42 without passing through the process bus 29, real time. (Especially real-time characteristics required for protection functions such as a breaker trip command) can be secured.

  Further, the device control unit communication means 42 and the device control units 30a-1 to 30a-n are in a one-to-one facing communication or the like, and there is no data collision between the device control units 30a-1 to 30a-n. By using a serial link or the like for this communication, the cable wiring space can be reduced.

  In the embodiment described above, all elements of the process bus communication unit 43, the integrated unit MU39, and the device control unit communication unit 42 need not be provided in the collective case 44. In some cases, the integrated unit MU may be provided. Alternatively, the process bus communication unit 43 may be omitted, or the device control unit communication unit 42 may be omitted.

  Further, the elements in the collective case 44 are coupled to the units (or printed circuit boards) of the protection control unit, the integrated unit, the device control unit communication means, and the process bus communication means by an internal parallel bus (backboard, cable, etc.) 45. However, instead of the parallel bus connection form between the units, the connection at the electrical or electronic circuit level may be the parallel bus connection.

  Furthermore, even if the protection control unit 23, the integrated unit 39, the device control unit communication means 42, and the process bus communication means 43 are each constituted by a single board (unit), a part of the electronic circuit portion in the same board is combined. The other part may be configured as a single substrate (unit).

(13th Embodiment)
Next, a thirteenth embodiment of the present invention will be described with reference to FIG. FIG. 32 shows the configuration of the main part of the thirteenth embodiment, and the station bus 7, the remote monitoring device 2, and the centralized monitoring device 3 are not shown in the figure because they are unnecessary for explanation.

  In FIG. 32, Bay represents a bay that is a protection control unit in the same electrical station. The illustrated electrical station has a single bus configuration, and is shown in a three-phase connection diagram. The transmission line 26 branches from the bus 24 via a circuit breaker 25CB and a disconnector / grounding switch (not shown). It is said.

  On the bus 24 side of the circuit breaker 25CB, at least one core of current detection means 27-1 is arranged for each phase, and at least one core of voltage detection means 27-4 is arranged for one phase, and the circuit breaker 25CB is arranged. On the power transmission line 26 side, at least one core of current detection means 27-2 is arranged in each phase, and at least one core of voltage detection means 27-3 is arranged in each phase.

  A sensor unit 28 is disposed in the vicinity of each current detection means and each voltage detection means, and each sensor unit 28 and the integrated unit 39 are connected by a one-to-one communication means 38. In general, it is connected by optical communication from the viewpoint of noise resistance. The integrated unit 39, the protection control unit 23, and a device control unit (not shown) are connected by a process bus 29.

  The built-in device that connects the protection control unit, the integrated unit, and the device control unit communication means by parallel transmission is adopted, and the output of each current detection means and each voltage detection means is integrated in the built-in equipment. It is good also as a structure input into a unit.

  Further, without using an integrated unit, the output of each current detection means and each voltage detection means is input to one sensor unit, and the sensor unit, protection control unit, and device control unit are connected by a process bus. Also good.

  In addition, an embedded device that connects the protection control unit, sensor unit, and device control unit communication means by parallel transmission is adopted, and the output of each current detection means and each voltage detection means is output without using an integrated unit. It is good also as a structure which inputs into the sensor unit in an embedded device.

  According to the substation protection control system of the thirteenth embodiment having the above-described configuration, it is possible to obtain all the electric quantities necessary for line protection, bus protection, and circuit breaker synchronous switching for each bay. The amount of electricity can be transmitted to the device control unit and the protection control unit via the process bus 29. Further, since the voltage detection means is arranged on the bus side, it is possible to dispense with the distribution of the bus voltage information. In addition, in an electric station having a double bus configuration, it is not necessary to switch between the bus voltage information.

(Fourteenth embodiment)
FIG. 33 is a diagram showing a fourteenth embodiment of the present invention.
The difference between this figure and the embodiment of FIG. 30 is that the sensor unit 28 ′ shown in FIG. 29 is replaced instead of the integrated unit 39 connected to the parallel bus 45.

  That is, in FIG. 33, the protection control unit 23 that performs monitoring and control of the substation equipment body, the sensor unit 28, the equipment control unit communication means 42 that communicates with the equipment control units 30a to 30n, and the first embodiment will be described. The process bus communication means 43 that communicates with the process bus 29 is housed in a collective case and coupled to each other by a parallel bus 45.

  The parallel bus 45 is, for example, a VME bus, a PCI bus, a compact PCI bus, or the like, and the parallel bus is not specifically limited in the present embodiment.

  The conditions for adopting this configuration are limited to the case where the secondary outputs of the current detection means and the voltage detection means are relatively large and can be transmitted over a relatively long distance by analog electricity without being affected by noise. At least one sensor unit is required for each bay, and no integrated unit is required.

  Further, as in FIG. 30, this process bus connection function enables data transmission / reception via the process bus to / from the protection control unit, sensor unit, device control unit, etc. for direct connection to the process bus.

(Fifteenth embodiment)
FIG. 34 is a system configuration diagram of a protection control system showing a fifteenth embodiment of the present invention.
The feature of this embodiment is that a repeater 46 is provided between the process bus 29 and the station bus 7 to amplify the transmission signal and transmit it to the entire substation. That is, in FIG. 33, the integrated unit 39 transmits the current voltage data to the process bus 29 and further transmits the entire substation through the repeater 46.

  The protection control unit 23 takes in current / voltage data from the process bus (in-device bus) 29 and the station bus (inter-device bus) 7 and performs protection control. When the break is necessary, the protection control unit 23 transmits a break command to the device control unit 30 to operate the breaker.

  According to this embodiment, since the transmission signal from the process bus can be amplified by the repeater, it is suitable for a case where the distance from the installation location of the substation main body to the control main building is long and the signal is attenuated.

(Sixteenth embodiment)
FIG. 35 is a system configuration diagram of a protection control system showing a sixteenth embodiment of the present invention. In the present embodiment, a router 47 is provided instead of the repeater 46 of FIG. 34 already described. The router 47 determines the destination of the communication data from the destination address of the communication data and relays the communication data to the network to which the destination device is connected.

  That is, in FIG. 35, the integrated unit 39 transmits current voltage data to the in-device bus 29 and further transmits to the entire substation through the router 47. Unlike the repeater 46, the router 47 does not send data related only to the device to the inter-device bus 29. As a result, the minimum necessary data is transmitted to the intra-device bus and the inter-device bus.

(Seventeenth embodiment)
FIG. 36 is a system configuration diagram of a protection control system showing a seventeenth embodiment of the present invention.
In FIG. 36, the integrated unit 39, the device control unit 30, and the protection control unit 23 are connected to a hub 49 by an optical fiber 48 to form an in-device bus. The plurality of intra-device bus hubs 49 are connected to the inter-device bus hub 49 by optical fibers 48 to form an inter-device bus.

  The hub 49 of the inter-device bus is connected to the protection control unit via an optical fiber. The hub 49 has a function of transmitting an optical signal input from an optical fiber to another optical fiber.

  According to the present embodiment, since the apparatuses are connected by optical fibers, an in-device bus and an inter-device bus that are not affected by electromagnetic noise can be formed.

(Eighteenth embodiment)
FIG. 37 is a system configuration diagram of a protection control system showing an eighteenth aspect of the present invention.
In FIG. 37, the integrated unit 39, the device control unit 30, and the protection control unit 23 are connected to a hub 49 by an optical fiber 48 to form an in-device bus. The plurality of intra-device bus hubs 49 are connected to the inter-device bus hub 49 through the router 47 by optical fibers 48 to form an inter-device bus. The hub 49 of the inter-device bus is connected to the protection control unit via an optical fiber.

  According to this embodiment, since apparatuses are connected by optical fibers, an in-device bus and an inter-device bus that are not affected by electromagnetic noise can be formed. In addition, since a router is installed between the intra-device bus and the inter-device bus, each device internal bus specific data is not sent to the inter-device bus, and the minimum necessary data is transmitted.

(Nineteenth embodiment)
FIG. 38 is a system configuration diagram of the protection control system showing the nineteenth mode of the present invention. In FIG. 38, a device internal bus connecting the integrated unit 39, the device control unit 30 and the protection control unit 23 is connected by a parallel bus 50 capable of simultaneously transmitting a plurality of bits instead of a process bus performing serial transmission.

  Further, the serial communication interface 51 is connected to the parallel bus 50, and the serial communication interface 51 is connected to the hub 49 of the inter-device bus by the optical fiber 48 to form the inter-device bus.

  In the present embodiment, since the integrated unit 39, the device control unit 30, and the protection control unit 23 are connected by the parallel bus 50, a high-speed device bus can be easily formed. In addition, since devices are connected by optical fiber, a system that is not affected by electromagnetic noise can be constructed.

(20th embodiment)
FIG. 39 is a system configuration diagram of a protection control system showing a twentieth aspect of the present invention. In FIG. 39, the present embodiment is configured such that the integrated unit 39, the device control unit 30, and the protection control unit 23 are connected to a switching hub 49 that connects a plurality of bays by an optical fiber 48.

  The switching hub determines the communication data destination from the destination address of the communication data and outputs the communication data only to the optical fiber to which the destination device is connected.

  In the present embodiment, even when a large number of devices are connected, by exchanging data with the switching hub 49, it is possible to sufficiently secure individual communication bands between the respective integrated units and protection control units. In addition, the switching hub 49 and the protection control unit 23 are controlled in a good environment (that is, a control room with less noise, temperature / humidity, vibration, etc., which is less affected by noise and controlled at room temperature by air conditioning equipment). It is possible to install the apparatus in a location where the maintenance can be performed very easily.

  Furthermore, since only one switching hub is interposed between the protection control unit and any integrated unit and device control unit, high-speed communication is possible.

(21st Embodiment)
FIG. 40 is a system configuration diagram of the protection control system showing the twenty-first mode of the present invention. In FIG. 40, in this embodiment, an integrated unit 39, a device control unit 30, a protection control unit 23, and a repeater 46 or a router 47 are installed in two systems A and B. Of course, the internal bus and inter-device bus are also installed for the A and B2 systems, respectively.

  As a result, from the integrated unit that transmits instantaneous data to the device control unit that drives the trip coil, the A and B systems operate independently, so even if either system fails and the function of one system stops, The trip coil can be operated by a normal system.

  When the sensor unit 28 is installed in an environment that is environmentally strict for electronic components such as the vicinity of the instrument transformer 27, the reliability may be improved by duplicating the sensor unit 28.

(Twenty-second embodiment)
FIG. 41 is a configuration diagram of a substation protection control system showing a twenty-second embodiment of the present invention. 41, in the present embodiment, an intranet 53 is connected to a station bus 7 via a gateway 52, and browsers 54-1 to 54-n are further connected to the intranet 53. Further, the central monitoring control device 3, the line control units 21-1 to 21-n, the protection units 22-1 to 22-n, the sensor unit 28, and the device control unit 30 are each incorporated with a web server 55.

  Since the present embodiment is configured as described above, the monitoring information is collected on the web server 55 of each of the centralized monitoring control device 3, the line control units 21-1 to 21-n, and the protection units 22-1 to 22-n. By issuing a control command from the web server 55, monitoring control from remote browsers 54-1 to 54-n connected to the intranet 53 becomes possible.

  The sensor unit 28 and the device control unit 30 are also connected to the line control units 21-1 to 21-n and the protection units 22-1 to 22-n through the process bus 29, and further from there, the station bus 7 station bus 7 and the gateway 52 are connected to the intranet 53, and similarly, monitoring control from remote browsers 54-1 to 54-n connected to the intranet 53 becomes possible.

  Further, by linking the respective web servers, the centralized monitoring control device 3, the line control units 21-1 to 21-n, the protection units 22-1 to 22-n, the sensor unit 28, and the device control unit 30 are linked. Monitoring control is possible. For example, the entire substation is usually monitored by the browser 54-1, and if an abnormality is found, it is related to the corresponding line control unit 21-1, protection unit 22-1, sensor unit 28, and device control unit 30. For example, detailed monitoring of information to be performed at the same time.

(23rd embodiment)
FIG. 42 is a configuration diagram of a substation protection control system showing a twenty-third embodiment of the present invention.
In FIG. 42, the centralized monitoring control device 3, the line control units 21-1 to 21-n and the protection units 22-1 to 22-n are connected to the intranet 9x02 via the gateway 9x01 connected to the station bus 7. Browsers 9x03-1 to 9x03-n are connected to the intranet.

  In addition, the central monitoring control device 3, the line control units 21-1 to 21-n, the protection units 22-1 to 22-n, the sensor unit 28, and the device control unit 30 incorporate web servers, respectively. The server includes wireless communication means 56 so that wireless communication can be performed with the gateway 52 or the personal computer 57, and has a function of transmitting the web server data to the gateway 52 or the personal computer 57.

  Since the present embodiment is configured as described above, the centralized monitoring control device 3, the line control units 21-1 to 21-n, and the protection units 22-1 to 22-n collect monitoring information on the respective web servers 55. The monitoring control from the remote browsers 54-1 to 54-n connected to the intranet 53 is performed by issuing a control command to the gateway 52 by the wireless communication means 56 connected to the web server 55 from the browser 54 side. It becomes possible.

  Further, the sensor unit 28 and the device control unit 30 can also issue a control command to the gateway 52 by the wireless communication means 56 connected to the web server. It is connected to the intranet 53, and monitoring control from remote browsers 54-1 to 54-n connected to the intranet 53 is also possible.

  Further, by linking the respective web servers, the centralized monitoring control device 3, the line control units 21-1 to 21-n, the protection units 22-1 to 22-n, the sensor unit 28, and the device control unit 30 are linked. Monitoring control is possible.

  For example, the entire substation is usually monitored by the browser 54-1, and if there is an abnormality, it is related to the corresponding line control unit 21-1, protection unit 22-1, sensor unit 28, and device control unit 30. Detailed monitoring of information to be performed can be performed simultaneously.

(24th Embodiment)
FIG. 43 is a system configuration diagram of the protection control system showing the twenty-fourth embodiment of the present invention. However, the remote monitoring device 2 and the centralized monitoring device 3 shown in FIG.

  FIG. 43 is a diagram showing a main part when the bays Bay-a to Bay-n, which are protection control units in the same electric station, are used as the electric line of the electric station having a single bus line configuration. The line line branched from the bus line 24 (described here using the bay Bay-a) is composed of a circuit breaker 25CBa, a disconnect / ground switch 25Da1, 25Da2, and current or voltage detection means 27a1, 27a2. .

  Although not shown in the vicinity of the current or voltage detection means 27a1 and 27a2, sensor units are respectively arranged, and each sensor unit and the integrated unit 39a are connected by a one-to-one facing communication path. Corresponding device control units 30a1 to 30a3 are installed in the vicinity of the circuit breaker 25CBa and the disconnecting / grounding switches 25Da1 and 25Da2, respectively.

  The device control units 30a1 to 30a3, the protection control unit 23a, and the integrated unit 39a are connected by a process bus 29a. The other line lines (bay Bay-n) have the same configuration. Although not shown, transformer lines, bus connection lines, bus section lines, and the like have similar configurations in which an equipment control unit, an integrated unit, a protection control unit, and a process bus are arranged.

  The protection control units 23-1 to 23-n for each bay Bay-a to Bay-n are connected to the monitoring control device 4 by the station bus 7. Communication between the bays Bay-a to Bay-n is performed by connecting the process buses 29 a to 29 n via the router 47. Further, the portable terminal 58 is connected to the router 47 via the communication means 47x. This portable terminal incorporates portable terminal connection means 58a having a LAN interface. The mobile terminal connection means 58a may be removable from the mobile terminal 58.

  Thus, the portable terminal 58 is connected to the process buses 29a to 29n for each bay via the router 47, and can access the device control units 30a to 30n, the protection control units 23a to 23n, and the like.

  Thereby, the portable terminal 58 is connected to the process buses 29a to 29n for each of the bays Bay-a to Bay-n via the portable terminal connection means 58a, the communication means 47x, and the router 47, and the device control units 30a to 30n and the protection. The control units 23a to 23n can be accessed.

  According to the present embodiment described above, since the portable terminal is connected to the process bus via a connection device such as a router, the process bus can be connected even when the substation is far away from the device to be accessed. Thus, it becomes possible to easily obtain information on the device. The connection between the router and the portable terminal may be performed wirelessly instead of wired as shown in FIG. As the portable terminal 58, for example, a portable personal computer, a PDA, or a dedicated terminal is used. As the communication means 47x, for example, RS232C, GPIB, or LAN is used, which may be wired (electrical or optical transmission) or wireless.

(25th Embodiment)
Next, a twenty-fifth embodiment will be described with reference to FIGS.
One of the features of this embodiment is that a portable terminal connection means 30h is provided on the internal bus 30g of the device control unit 30 described with reference to FIG. 5, and a personal computer, PDA or dedicated portable device is connected to the connection means 30h via the communication means 30i. This is a hardware feature in which a portable terminal 58 such as a terminal is detachably connected.

  Another feature is that regarding the specific device monitoring control data, the protection control device PCU is immediately received when a data request signal is received from the protection control device PCU or the monitoring control device and when an abnormality occurs in the substation main body. Alternatively, the data is transmitted to the monitoring control device, and the other device monitoring data is transmitted to the protection control device PCU or the monitoring control device at a specified cycle.

First, the hardware features will be described with reference to FIG.
When there is a request command for device control monitoring data from the portable terminal 58 to the device control unit 30, the device control unit 30 reads the requested device control monitoring data from the data storage means 30 e and transmits it to the portable terminal 58. When the requested information is related to device control or status display, the information can be displayed on the portable terminal 58.

  When the requested information is related to device monitoring, not only waveform information but also calculation results such as monitoring judgment results and switching times are transmitted simultaneously. The data that can be requested by the portable terminal 58 can be requested not only for the real-time information of the device at the time of the data request but also for the data stored in the data storage means 30e.

  In addition, the portable terminal 58 is connected to the information stored as a database in the storage device of the protection control unit 23 or the monitoring control device 4 via the device control unit 30 and the process bus 29, or the protection control unit 23 or the monitoring control device 4. Can be requested and displayed on the portable terminal 58.

  Further, when a request command for driving the transformer main body 25 is received from the portable terminal 58 to the device control unit 30, the device control unit 30 controls the interlock conditions and the control from the protection control unit 23 and the monitoring control device 4 with the CPU 30c. Commands are compared and determined, and a drive signal is output from the drive circuit 30d based on the determination result. That is, by operating the mobile terminal 58, the substation main body 25 can be operated.

  In addition, by running an appropriate program on the portable terminal 58, it is possible to automate operations associated with the test / inspection, such as determination of pass / fail of the test result and creation of a test report.

  The embodiment having the above configuration has the following effects. In other words, even without an on-site control panel, it is possible to control the equipment and display the equipment status through the mobile terminal at the site, and to check the information on the protection control unit and the monitoring control device while at the site. it can.

  In addition, by using the sensor installed in the equipment monitoring device as a test sensor, it is not necessary to attach the testing sensor and measuring instrument in the factory test and the field installation test. By using a portable terminal as an input, data can be taken in by commands from the portable terminal, and the main unit can be operated to realize an automatic test function, an automatic inspection function, and an automatic recording function.

  Taking the circuit breaker as an example, if the input / output configuration of the device control unit is the configuration shown in FIG. 46, the switching test (command current, operating time, stroke, control voltage, oil pressure, gas pressure), interlock It becomes possible to automate items such as tests.

  Therefore, it is possible to save labor for the tester and reduce the test cost in the factory test and the field installation test. In particular, when a wireless terminal is used as a portable terminal and connected to the device control unit by wireless communication, the cable connection between the device control unit and the portable terminal becomes unnecessary, further reducing labor for the tester and reducing the test cost. Can do.

  In addition, since the device control unit stores data acquired during factory tests, data acquired during field installation tests, and control monitoring data during operation from a mobile terminal, the current device status can be viewed. It is easy to compare with the state of past operation at the time of factory shipment, on-site installation test, and the efficiency of equipment maintenance and inspection can be improved.

  Next, software features will be described with reference to FIG. In FIG. 45, when the device control unit 30 takes in monitoring data from auxiliary contacts and monitoring sensors attached to the transformer device main body such as a circuit breaker, a disconnector / grounding switch, the CPU 30c calculates these monitoring data. Then, the presence / absence of abnormality of the substation main body is determined.

  By the way, there are roughly two types of monitoring data that the device control unit CMU 30 captures, one is data that the power system monitoring system should always grasp information, and the other is not always necessary, but an abnormality has occurred. This data is required when there is a request from the host, such as when it is necessary to grasp the aging of the device status or equipment.

  Data to be constantly grasped is immediately input to the line control unit in the protection control unit, emergency monitoring data is temporarily stored in the data storage means 30e, and when the data control request from the host control unit 21 etc. Send to the system.

  Taking the circuit breaker 25 as an example, the former data that should be constantly grasped include the circuit breaker open / close state, oil pressure abnormality (normal / abnormal determination result), and gas pressure abnormality (normal / normal CPU). This is information necessary for circuit breaker switching control and interlock configuration, such as the result of abnormality determination), and must be periodically transmitted to a host system such as a line control unit at relatively short intervals.

  The latter emergency monitoring data includes the stroke curve waveform, command current waveform, and analog values of oil pressure and gas pressure during the circuit breaker opening / closing operation, and these are used to investigate the cause when an abnormality occurs in the circuit breaker. It can be used as one of the data for this purpose, and by grasping the tendency of the secular change of these data, it can be used for judging the inspection time and life of the equipment.

  As for the transmission of these data to the host device, the former is periodically transmitted in a relatively short time. The latter does not need to be transmitted periodically, and since the amount of data is huge and periodically transmitted is inefficient and uneconomical, it is stored in the data storage means in the device control unit, When there is a data reference request from the host device, the referenced request data is transmitted.

(26th Embodiment)
46 to 48 are diagrams showing configuration examples of embodiments when the device control unit is applied to a circuit breaker, a disconnector / ground switch, and a load tap changer, respectively, and FIG. It is a figure for demonstrating the interlock of a disconnector / grounding switch.

  FIG. 46 shows input / output signals of the circuit breaker device control unit 30CB as “breaking coil (TC)”, “closing coil (CC)”, “auxiliary contact (a contact)”, “auxiliary contact (b contact)”. , “Hydraulic pump motor drive control”, “stroke waveform”, “command current waveform”, “control voltage waveform”, “gas pressure”, “oil pressure”, “temperature”, “coil current waveform”. The data acquired by the monitoring sensors listed here is particularly important monitoring data for diagnosing the switching characteristics of the circuit breaker.

  In addition, the circuit breaker device control unit 30CB has a cut-off switch that can directly drive the cut-off coil in an emergency. This “emergency cutoff switch” may be installed in the unit of the device control unit or in the vicinity of the drive unit of the circuit breaker.

  FIG. 47 shows “auxiliary contact (a contact)”, “auxiliary contact (b contact)”, “motor drive control”, “stroke waveform” as input / output signals in the case of the disconnector / ground switch device control unit 30DE. ”,“ Motor current waveform ”,“ control voltage waveform ”,“ gas pressure ”,“ manual handle insertion ”. The data acquired by the monitoring sensors listed here is particularly important monitoring data for diagnosing the switching characteristics of the disconnecting switch / grounding switch.

  FIG. 48 shows input / output signals in the case of the on-load tap changer device control unit 30TR as “switch contact”, “timing contact”, “motor drive control”, “tap position”, “motor current waveform”, “ Control voltage waveform ". The data acquired by the monitoring sensors listed here is particularly important monitoring data for diagnosing the switching characteristics of the on-load tap changer.

  The twenty-sixth embodiment having the above-described configuration performs the following operation. The fault current and voltage information detected by the current or voltage detection means 27 is transmitted to the protection control unit 23 via the integrated unit 39 and the process bus 29. The protection control unit 23 performs a protection operation and issues a cutoff command to the device control unit 30 of the circuit breaker 25CB of the line via the process bus 29. The device control unit 30 determines the interrupt command received by the CPU 30c, and transmits a drive signal from the drive circuit 30d to the interrupt coil 25c of the circuit breaker based on the determination result.

  Similarly, when controlling the substation main body 25, control signals from the protection control unit 23 or the monitoring control device 4 (open / close command for a breaker, on / off command for a disconnect / ground switch, on load) In the case of a tap changer, the CPU 30c compares and determines the operation status data of the device, the interlock condition, etc., and the drive signal is sent from the drive circuit 30d to the drive unit 25c of the substation device main body 25 based on the determination result. Send.

  Here, the control items calculated by the CPU 30c of the device control unit 30 are, for example, 1. when the transformer device body 25 is the circuit breaker CB. 1. Driving control of closing / cutting coil; 2. Pumping prevention control; 3. Operation lock control, 4. Phase loss protection control, 5. Hydraulic pump drive control, 6. Interlock control, For example, the time of an event. In addition, 8. When adding functions such as synchronous open / close control, it is supported by software changes.

  In addition, device control monitoring data (for example, an open / close status, a gas pressure alarm, a hydraulic pressure alarm, etc.) that is always necessary for the protection control unit 23 or the monitoring control device 4 to control / monitor the device is fixed via the process bus 29. Is transmitted to the protection control unit 23 or the monitoring control device 4 at a cycle of At this time, it is also possible to make a configuration in which the CPU 30c performs abnormality determination such as gas pressure and hydraulic pressure, and always transmits only the result.

  In addition, data that is not normally required, such as a stroke waveform of a circuit breaker, is transmitted only when a request command is issued from the protection control unit 23 or the monitoring control device 4. At this time, the waveform data can be stored in the data storage means 30e, and this data can be called up whenever necessary. Therefore, data at the time of the factory test and the field test can be stored in the device control unit 30 as a database.

  Further, the amount of electricity (energization current, applied voltage) of the system necessary for the device control unit 30 to control the transformer device main body 25 can be referred to via the process bus 29.

  Further, the device control unit 30 refers to the status data of each device control unit in the bay and between the bays via the process bus 29 and the router 47, calculates the interlock condition by the CPU 30c, and determines the operation mechanism. An in-bay interlock or an inter-bay interlock of the operation mechanism is configured.

  In addition, when a “manual handle” is inserted into the transformer device main body 25 and the device is in a state where it can be controlled manually, the control operation of the operation mechanism from the protection control unit 23 and the monitoring control device 4 is disabled. Configure the interlock.

  The substation equipment protection control system of the twenty-sixth embodiment having the above-described configuration has the following characteristics.

  In other words, the drive control and monitoring of the substation equipment, which was realized by combining auxiliary relays and timer relays with the conventional on-site control panel, is realized by software running on the control / monitoring CPU, and the operation mechanism section is driven. Since this is performed by a semiconductor switch of the drive circuit, a function equivalent to that of the on-site control panel can be realized by one or a plurality of substrate circuits.

  In addition, the control circuit board makes it possible to greatly reduce the number of man-hours for mounting control components and the number of electrical wiring, and it is possible to eliminate the conventional on-site control panel 9 and incorporate the equipment control unit into the main body of the substation equipment. This makes it possible to make the transformer main body compact, reduce the total cost, and integrate the main unit and protection / control maintenance.

  In addition, since the control and monitoring of the equipment is realized by software, the hardware design is changed to change the control and monitoring conditions that differ depending on the model and operation mode, such as interlock conditions, and to expand the control and monitoring functions. However, it can be easily realized by changing the software.

  In addition, since data that needs constant monitoring and data that does not need constant monitoring are transmitted separately, efficient and high-quality data transmission can be achieved. In other words, huge data that puts an excessive load on the communication means, such as the stroke waveform of the circuit breaker, is sent only when it is required or when an abnormality occurs in the substation main body. It is possible to transmit while coordinating with the communication status, and it is not necessary to reduce the data quality in consideration of the amount of data transmitted by the communication means.

  Therefore, various data can be acquired through the device control unit and the communication means with the quality required for the test. Thereby, especially for the periodic inspection, a remote maintenance function that realizes an automatic test, an automatic inspection, and an automatic recording function via the communication means can be substituted.

  Further, in addition to monitoring and controlling the interlock state from a host system such as a monitoring control device, a plurality of device control units can monitor and control each other, so that the reliability of the interlock can be improved. Further, since the interlock can be prevented from being accidentally released by a command from the host system during the inspection of the equipment, the safety during the inspection of the equipment can be improved.

  In addition, since the device control unit for the circuit breaker has an emergency cut-off switch, it is possible to shut off the circuit breaker in the form of a final backup without going through the process bus even if any abnormality occurs in the process bus. become.

(Details of interlock conditions)
The outline of the interlock condition has already been described. Hereinafter, the interlock condition of the circuit breaker, the breaker / ground switch, etc. between the bays will be described in detail with reference to FIG.

  In FIG. 49, the device control unit CMU 30 attached to a switch such as the circuit breaker 25CB and disconnector / ground switch 25D of each bay captures status information of the switch operating mechanism.

  The status information includes an open / close state, a gas pressure state, a hydraulic pressure state, etc. for the circuit breaker 25CB, and an open / close state, a gas pressure state, a manual handle insertion state, etc. for the disconnect / ground switch 25D. The status information of each of the circuit breaker 25CB and the disconnecting / grounding switch 25D can be referred to between the device control units CMU 30 via the process bus 29. Further, the device control unit CMU 30 can refer to the current / voltage information of the main circuit from the sensor unit or the integrated unit (shown as MU 39 in the figure) via the process bus 29.

  For example, the device control unit CMU 30 of the circuit breaker 25CB directly takes in the status information of the operation mechanism of the circuit breaker 25CB, and via the process bus 29, status information of the disconnect / ground switch 25D, main circuit current / voltage information. The CPU 30c calculates an interlock condition from this information.

  Based on the interlock condition calculation result, the device control unit CMU 30 constitutes an interlock of the operation mechanism. The CPU 30c sends an interlock command or an on / off command to the drive circuit (semiconductor switch) 30d. Similarly, the device control unit CMU 30 of the disconnector / grounding switch 25D calculates the interlock condition of the operation mechanism. In this way, the device control unit CMU 30 can configure an in-bay interlock.

  On the other hand, the status information, current / voltage information, and in-bay interlock conditions of each bay switching device can be referred to between device control units in different bays via a process bus and a router. Accordingly, the device control unit CMU 30 can also calculate the interlock condition between the bays by the same operation as described above.

(Modification of 26th Embodiment)
In this modified example, the intra-bay interlock condition calculation and the inter-bay interlock condition calculation are performed by the protection control unit.

  Also in this modification, the device configuration of the protection control unit, the circuit breaker, and the switch / grounding switch device control unit is substantially the same as the configuration in the twenty-sixth embodiment. The function of this embodiment can be realized by changing the installed software.

  The protection control unit 23 sends device control monitoring data and main circuit current / voltage information necessary for the interlock calculation to the device control unit (CMU) 30 and the sensor unit or integrated unit (MU) via the process bus 29 and the router 47. ) 39, and the interlock condition is calculated by the CPU 30c to configure the in-bay interlock of the operation mechanism or the inter-bay interlock of the operation mechanism. The interlock command is transmitted to the device control unit CMU 30 of the operation mechanism via the process bus 29 and the router 47, and the device control unit CMU 30 interlocks or operates the switchgear.

(Details of interlock condition of modification)
Referring to FIG. 50, the interlocking conditions of the switches such as the circuit breaker and the disconnecting switch / grounding switch between the bays of the modification will be described in detail. In FIG. 50, a device control unit CMU 30 attached to a switch such as a circuit breaker of each bay, a disconnect switch / ground switch, takes in status information of an operation mechanism of the switch.

The status information includes an open / close state, a gas pressure state, and a hydraulic state for a circuit breaker, and an open / close state, a gas pressure state, a manual handle insertion state, and the like for a disconnect / ground switch. The status information of each of the circuit breaker and disconnector / ground switch can be referred to by the protection control unit (PCU in the figure) via the process bus. The protection control unit PCU 23 can also refer to the current / voltage information of the main circuit via the process bus 29 from the sensor unit or the integrated unit (MU in the figure).

  The protection control unit PCU23 fetches the status information of the circuit breaker, disconnector / ground switch and the current / voltage information of the main circuit of the operation mechanism via the process bus 29 (process bus communication means 23c), and from this information, the CPU 23a To calculate the interlock condition. Based on the interlock calculation result, the protection control unit PCU 23 constitutes an interlock of the operation mechanism.

  For example, the protection control unit PCU 23 transmits the interlock condition to the device control unit CMU 30 for the circuit breaker 25CB via the process bus 29. The circuit breaker device control unit CMU 30 sends an interlock command or an on / off command to the drive circuit (semiconductor switch) 30d based on the received interlock condition.

  Similarly, the protection control unit PCU23 also transmits an interlock condition to the device control unit CMU30 for the disconnector / ground switch 25D. In this manner, the interlock control can be calculated by the protection control unit to configure the in-bay interlock.

  On the other hand, the status information, current / voltage information, and in-bay interlock conditions of each bay switching device can be referred to between the protection control unit and the device control unit in different bays via the process bus 29 and the router 47. Therefore, by the same operation as described above, the protection control unit can also configure the calculation of the interlock condition between the bays, and can configure the interlock between the bays.

  According to the modification described above, the following effects are obtained in addition to the effects of the substation equipment protection control system of the twenty-sixth embodiment.

  Normally, multiple device control units are installed in the bay, but instead of each device control unit performing an interlock operation, one or more protection control units installed in the normal bay collectively perform the interlock operation. Therefore, the software for the interlock calculation needs to be incorporated into one protection control unit for one bay, and the software does not need to be developed individually for the circuit breaker and the disconnect / ground switch. Therefore, the burden of software development can be reduced.

  Next, the modification of the twenty-sixth embodiment can be further modified as follows. Using the parallel bus (internal bus), the process bus, and the device control unit communication means (CMU communication means in the figure) as described with reference to FIG. 30 in the twelfth embodiment, the protection control unit, device control unit, It is obvious that the interlock configuration of the present embodiment can be applied even to a substation protection control system that connects MUs or the like to each other.

  In addition, in the substation protection control system as shown in FIG. 30, the interlock condition may be calculated by a CPU provided in the CMU communication means. Even in such a configuration, it is obvious that the same effect as the present embodiment can be obtained.

  In addition, the device control unit CMU described in the twenty-sixth embodiment can perform calculations such as device monitoring determination by the protection control device or the CPU of the CMU communication means in the same manner as the interlock calculation. It is. Even in such a form, it is clear that the effect of the twenty-sixth embodiment can be obtained.

  In addition, in such an embodiment, the device control unit CMU transmits the A / D conversion data of the monitoring information of the transformer device main body (in the case of contact information, it may be simply transmitted), and ON / OFF of the drive circuit The CPU (30c in FIG. 5) in the device control unit CMU can be deleted because it only needs to have a control function. Accordingly, the device control unit has a very simple hardware configuration.

  Note that the fact that the CPU 30c in FIG. 5 is unnecessary means that a control LSI equivalent to a high-precision CPU is unnecessary, and it may be necessary to mount a minimum control means for controlling the process bus communication means and the drive circuit. .

(Twenty-seventh embodiment)
51 is a system configuration diagram of a protection control system showing a twenty-seventh embodiment of the present invention, and FIG. 52 is a diagram showing a part in detail.

  This embodiment is a modification of the sixth embodiment (FIG. 16), and has a one-to-one communication means 59 between the integrated unit and the protection control unit, and a one-to-one communication between the protection control unit and the device control unit. Means 60 is added to the components of FIG. These one-to-one communication means are communication means independent of the process bus 29 and normally use optical communication.

  Other components are the same as those in FIG. The same idea can be applied to the eleventh embodiment shown in FIG. In this case, in FIG. 29, one-to-one communication means is provided between the sensor unit and the protection control unit and between the protection control unit and the device control unit.

  FIG. 52 is a configuration diagram showing in detail the connection relationship by the communication means 60 between the protection control unit 23 and the device control unit 30 in FIG. Although the components of the device control unit have already been described with reference to FIG. 5, the present embodiment is connected to the interface 30 j for the one-to-one-facing communication means 60 between the protection control unit 23 and the device control unit 30. A second internal bus 30k and a second circuit breaker drive circuit 30m connected to the internal bus 30k are added. In addition, it is good also as a structure which abbreviate | omits the internal bus 30k and transmits the interruption | blocking instruction | command directly to the circuit breaker drive circuit 30m.

  The substation equipment protection control system according to the twenty-eighth embodiment having the above-described configuration operates as follows.

  First, the outputs of the current detection means 27-1, 27-2 and the voltage detection means 27-3 are converted into digital values by the sensor units 28a, 28b, 28c installed in the vicinity, and each one-to-one communication means. At 505, it is transmitted to the integration unit 39. The integration unit 39 integrates the digital signals of each current and each voltage transmitted from the sensor units 28a to 28c into, for example, a transmission frame for each protection control unit, and assigns a time, so that between the integration unit and the protection control unit. The data is transmitted to the protection control unit 23 via the one-to-one communication means 59.

  The protection control unit 23 performs a protection operation and issues a disconnection command to the device control unit 30 of the circuit breaker 25CB of the line via the one-to-one communication means 60 between the protection control unit and the device control unit. The device control unit 30 transmits a drive signal to the breaker coil of the breaker via the interface 30j of the one-to-one communication means, the internal bus 30k, and the breaker drive circuit 30m.

  The current / voltage information output from the integrated unit is distributed to devices other than the protection control unit 23 via the process bus 29 in parallel with the above.

  Usually, since the high-speed response and high reliability are not required except for the purpose of the protective circuit breaker, the one-to-one communication means 60 between the protection control unit 23 and the device control unit 30 is used for the circuit breaker. A circuit breaker control command provided only for the device control unit 30 and not used for protective circuit breakage is transmitted via the process bus 29.

  According to the substation equipment protection control system of 27th Embodiment which has the above structures, there exist the following effects.

  In the present embodiment, since the trip command transmission path is duplicated, even if a failure occurs in the process bus, it is possible to cut off the protection in the event of an accident, and it is possible to construct a highly reliable protection control system. In addition, when aiming for a more reliable fail-safe system, the internal bus in the device control unit and the circuit breaker drive unit are duplicated, and the signal transmission path related to protection is routed from the sensor unit (or integrated unit). The circuit breaker device control unit can be completely duplicated, and either the process bus or the one-to-one communication means can be used as the main protection, and the other can be used as the backup.

  In addition, since there is no processing overhead via a communication means that combines the integrated unit or sensor unit, protection control unit, and device control unit, application to a protection system that requires a particularly high-speed response is easy.

The block diagram of the transformation equipment protection control system which shows the 1st Embodiment of this invention. The substation equipment etc. arrangement | positioning drawing in the 1st Embodiment of this invention. It is a figure which shows an example of the sensor unit of the 1st Embodiment of this invention, Fig.3 (a) is a block diagram, FIG.3 (b) is a flowchart. The block diagram which shows an example of the protection control unit of the 1st Embodiment of this invention. The block diagram which shows an example of the apparatus control unit of the 1st Embodiment of this invention. The block diagram of the transformation equipment protection control system which shows the 2nd Embodiment of this invention. The block diagram which shows an example of the radio | wireless communication unit used in the 2nd Embodiment of this invention. The block diagram which shows the modification of the 2nd Embodiment of this invention. The block diagram of the transformation equipment protection control system which shows the 3rd Embodiment of this invention. The block diagram which shows an example of the protection control unit of the 4th Embodiment of this invention. The block diagram which shows an example of the protection control unit of the modification of the 4th Embodiment of this invention. The figure which shows an example of a structure and response of the protection control unit of the 5th Embodiment of this invention. The time chart explaining operation | movement of the protection control unit of FIG. The figure which shows the structure of the protection control unit concerning the 5th Embodiment of this invention, and another response example. The time chart explaining operation | movement of the protection control unit of FIG. The block diagram of the transformation equipment protection control system which shows the 6th Embodiment of this invention. The block diagram which shows the relationship between the coupling | bond unit of the 7th Embodiment of this invention, and a sensor unit. The block diagram which shows an example of the coupling | bonding unit of the 7th Embodiment of this invention. The block diagram which shows the modification of the 7th Embodiment of this invention. The block diagram which shows an example of the integrated unit of the modification of the 7th Embodiment of this invention. The block diagram which shows an example of the sensor unit of the modification of the 7th Embodiment of this invention. The block diagram which shows the relationship between the coupling | bond unit of the 8th Embodiment of this invention, and a sensor unit. The block diagram which shows the relationship between the coupling | bond unit of the 9th Embodiment of this invention, and a sensor unit. The block diagram which shows an example of the integrated unit of the 9th Embodiment of this invention. The figure which shows the sensor unit output data example of the 9th Embodiment of this invention. The sensor unit output waveform figure of the 9th Embodiment of this invention. The block diagram which shows the principal part of the 10th Embodiment of this invention. The figure which shows the reference signal for time synchronization. The block diagram which shows the principal part of the 11th Embodiment of this invention. The block diagram which shows the principal part of the 12th Embodiment of this invention. The figure which shows an example of the collective case of the 12th Embodiment of this invention. The block diagram which shows the principal part of the 13th Embodiment of this invention. The block diagram which shows the principal part of the 14th Embodiment of this invention. The block diagram of the transformation equipment protection control system which shows the 15th Embodiment of this invention. The block diagram of the transformation equipment protection control system which shows the 16th Embodiment of this invention. The block diagram of the transformation equipment protection control system which shows the 17th Embodiment of this invention. The block diagram of the transformation equipment protection control system which shows the 18th Embodiment of this invention. The block diagram of the transformation equipment protection control system which shows the 19th Embodiment of this invention. The block diagram of the transformation equipment protection control system which shows the 20th Embodiment of this invention. The block diagram of the transformation equipment protection control system which shows the 21st Embodiment of this invention. The block diagram of the transformation equipment protection control system which shows the 22nd Embodiment of this invention. The block diagram of the transformation equipment protection control system which shows the 23rd Embodiment of this invention. The block diagram of the transformation equipment protection control system which shows the 24th Embodiment of this invention. The block diagram of the transformation equipment protection control system which shows the 25th Embodiment of this invention. The software figure for demonstrating the 25th Embodiment of this invention. The figure which shows the apparatus control unit for circuit breakers used for the 26th Embodiment of this invention. The figure which shows the disconnecting switch used for the 26th Embodiment of this invention, and the apparatus control unit for earthing switches. The figure which shows the apparatus control unit for load tap changers used for the 26th Embodiment of this invention. Explanatory drawing of the interlock condition of the switch in the 26th Embodiment of this invention. Explanatory drawing of the interlock condition of the switch in the modification of the 26th Embodiment of this invention. The block diagram of the transformation equipment protection control system which shows the 27th Embodiment of this invention. The block diagram which shows the principal part of the 27th Embodiment of this invention. The block diagram of the transformation equipment protection control system by a prior art. The hardware block diagram of the line control apparatus of a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Control main building, 2 ... Remote monitoring control apparatus, 3 ... Centralized monitoring control apparatus, 4 ... Monitoring control apparatus, 7 ... Station bus, 20-1-20-n ... Substation equipment unit, 21-1-21-n ... Line control unit, 22-1 to 22-n ... Protection unit, 23 ... Protection control unit, 25 ... Switch, 24 ... Bus, 26 ... Power transmission line, 27 ... Electric quantity detector, 28 ... Sensor unit, 29 ... Process Bus, 30 ... device control unit, 31 ... process control box, 39 ... integrated unit, 182 ... inter-device bus, 46 ... repeater, 47 ... router, 49 ... concentrator (hub), 48 ... optical fiber, 45 ... parallel bus 51 ... Serial communication unit, 52 ... Gateway, 53 ... Intranet or Internet, 54-1 to n ... Browser, 55 ... Centralized monitoring control web server.

Claims (13)

A main body of the substation equipment installed in the electric station, a monitoring control device that performs monitoring control of the entire electric station including the main body of the substation equipment, information relay with a remote control station, and the like,
A plurality of sensor units that input the main circuit AC electricity amount of the transformer device body, convert it into digital data, and output it,
An integrated unit having a function of integrating digital data input from the plurality of sensor units and transmitting it as digital data;
Protection control means for inputting digital data output from the integrated unit and performing at least one function of monitoring, control and protection of the substation main body;
A device control unit that receives a command from the protection control unit or the monitoring control device, and that performs at least one function of monitoring and controlling the substation main body,
In a substation equipment protection control system comprising the integrated unit, the protection control means, the equipment control means, and a communication means for forming an information transmission path between the monitoring control devices,
Device control monitoring data from the protection control unit, the integrated unit, and the device control unit are relayed and transmitted to the protection control unit, and a control signal from the protection control unit is relayed and transmitted to the device control unit. A communication means for device control means, and a process bus communication means for relaying data sent and received between the process bus as a serial transmission medium and the protection control means or the device control means, are coupled to a parallel transmission medium. Substation equipment protection control system.   The substation protection control system according to claim 1, wherein a part or all of the communication means is constituted by wireless communication means.   Power is supplied from a control power source through a power line to at least a part of the sensor unit, the integrated unit, the device control unit, and the protection control unit, and the power line and each unit are coupled via a power line communication interface. The substation protection control system according to claim 1, wherein the power line is used as an information transmission path.   The protection control means includes a control digital arithmetic processor for monitoring and controlling control of the substation main body, a line control means having a control communication means, a protection digital arithmetic processor for performing protection arithmetic of the substation main body, and 2. The substation equipment protection control system according to claim 1, comprising a protection means having a protection communication means, wherein the line control means and the protection means are separated by hardware.   The protection control means includes a control digital arithmetic processor for monitoring and controlling control of the substation main body, a line control means having a control communication means, a protection digital arithmetic processor for performing protection arithmetic of the substation main body, and The substation apparatus according to claim 1, wherein the transformer includes a protection means having a protection communication means, and the line control means, the digital arithmetic processor of the protection means, and the communication means are constituted by common hardware. Protection control system.   The protection control means includes a control digital arithmetic processor for monitoring and controlling control of the substation main body, a line control means having a control communication means, a protection digital arithmetic processor for performing protection arithmetic of the substation main body, and 2. The protection means having a protection communication means, and at least a part of the digital control processor or the communication means of the line control means and the protection means is constituted by common hardware. Substation equipment protection control system.   2. The transformation device protection control system according to claim 1, wherein a set of current detection means and voltage detection means for detecting an AC electric quantity of the transformation device main body is arranged at both ends of the circuit breaker.   A communication bus in a device unit for performing communication among the device control means, the sensor unit, the integrated unit, and the protection control means provided for each bay, and communication between the communication buses in the device unit. And a repeater for connecting between the communication bus within the device unit and the communication bus between the device units, and the protection control means is controlled through the communication bus within the device unit and the communication bus between the device units. The substation equipment protection control system according to claim 1, wherein data transmission / reception necessary for protection is performed.   2. The transformation equipment protection control system according to claim 1, wherein the communication means comprises an optical fiber and a hub for the optical fiber.   The device unit communication bus is configured by a backplane bus for multi-bit data communication using a copper wire or a printed circuit board, and the device unit communication bus is configured by an optical fiber for communicating serial data and a hub for the optical fiber. The transformation equipment protection control system according to claim 8.   A communication bus connecting sensor units or integrated units in a plurality of bays, device control means and protection control means is provided, and this communication bus comprises a communication hub and a switching hub having a data exchange function. The substation protection control system according to claim 1, wherein communication is performed between the respective device units and between the device unit and the monitoring control device.   The communication means is connected to an intranet or the Internet via a gateway, and a browser is connected to the intranet or the Internet, and at least one part of each unit, means, and monitoring control device of the sensor unit, device control means, protection control means The substation protection control system according to claim 1, further comprising a web server.   The web server has a wireless communication means with the gateway or a personal computer, and the wireless communication means is provided in either the gateway or the personal computer, and the data of the web server is wirelessly transmitted to the gateway or the personal computer. The transformation equipment protection control system of Claim 12 characterized by these.

Images