JP3296416B2 - Power system protection control system and recording medium storing program for executing this system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

According to the present invention, a state quantity of an electric power system is input,
Digital protection and control device which converts the digital data into digital data and controls the protection of the power system, a display and operation device for performing a display operation for monitoring the operation and status of the device via a communication network, and a power system combining them The present invention relates to a protection control system and a recording medium on which a program for executing the system is recorded.

[0002]

2. Description of the Related Art Digital protection and control devices are already widely used in the field of electric power systems, but in recent years, their functions have been enhanced by the use of high-performance microprocessors and large-capacity memories. In particular, in order to save labor for the operation and maintenance of the device, it is possible to realize a remote operation monitoring system for operationally monitoring the operation and status of the digital protection and control device from a distant place via a wide area transmission network.

In these systems, in addition to detailed information on the operation and operation state of the digital protection controller, electric quantities (currents and voltages converted from digital data, etc.) input from a power system are transmitted via a transmission system. Can be displayed far away. As a specific example of this system, for example, a document (1996 IEEJ National Convention Lecture Book 1529)
"Development of a digital relay remote operation monitoring system").

[0004]

In a conventional system for remote operation of a digital protection and control device, a digital protection and control device (hereinafter referred to as "protection control device") has a wide area along with a remote operation menu. A request is issued from a remote personal computer or the like via a transmission network, and the protection control device receiving the request performs processing according to the request, and returns a response to the requesting device such as a personal computer. FIG. 18 shows an example of the remote operation menu.

[0005] For example, in the case where the setting is changed using the setting menu, as shown in FIG. 19, first, a substation and a device are selected in a communication menu in a remote operation menu, and a communication connection is made. After selecting the display operation menu, further selecting the setting, selecting the setting element to be changed, inputting the numerical value to be changed, issuing a write request to the EEPROM in the protection control device, and then issuing an operation start request. Become a procedure.

In this case, the communication path between the personal computer and the protection control device needs to be maintained until a series of processes is completed, so that the amount of communication on the communication network increases, and the communication delay and the communication are increased. There is a first problem that reliability is reduced due to loss of a packet.

FIG. 19 shows a change of one settling element. When the setting element has a plurality of elements, the required time is further increased. Further, in order to generate each request corresponding to the above-mentioned remote operation menu from the personal computer, the operator needs to perform an operation corresponding to each request every time.

[0008] This means that the number of operations increases as the functions of the target protection control device become more complicated and diversified, and the amount of work of the operator increases. Further, when the same operation is performed on a plurality of devices, the second problem is that the complexity of performing the same work on different devices occurs, and the reliability increases due to the increase in the amount of work and human error. is there.

In such a remote operation system, a plurality of protection control devices are operated by one personal computer. In this case, the contents of each protection control device (for example, a setting element due to a different protection method). Etc.) must be considered.

FIG. 20 shows the configuration in this case. As shown in the figure, the configuration on the personal computer side corresponds to the type of each protection control device. This means that as the types of protection control devices increase, the amount of compatible software to be provided on personal computers will increase,
There is a third problem in that economical efficiency and reliability are deteriorated due to remodeling for that purpose.

Further, in such a remote operation system, since a local network or a wide area transmission network is used, the remote operation of the protection control device can be easily performed at a place where it can be connected to these communication networks. It turns out that. That is, remote operation can be similarly performed from personal computers installed at a plurality of points.

FIG. 21 shows this state. In this case, as described above, it is necessary to equip each personal computer with remote operation software corresponding to each protection control device, and there is a fourth problem that the cost and maintenance are inexpensive.

Further, as described above, in the remote operation system, since the operation monitoring of a plurality of protection control devices can be performed by one personal computer, the related items (for example, a plurality of protection control devices connected to the same system) are related. For example, the amount of system electricity taken in by the system can be compared.

In this case, as the operation of the personal computer, communication connection with the target protection control device is performed, and each item is displayed according to the remote operation menu shown in FIG. If you want to check the status of the same item of the related device, make a communication connection with the related device in the same way.
It will be displayed along with the menu as indicated by 18.

In this case, if the number of target devices increases, this operation method requires operations of device selection, communication connection, and item selection for each device, and the operation becomes extremely complicated, and other related devices, The display screen of the items is displayed independently for each device, but since the related devices and items are not displayed in the same screen, it is too burdensome for the operator to compare the related items. There are five problems.

In this case, it is conceivable that the menus are grouped for the same items related to a plurality of devices. However, when it is desired to view different items for each device, there is the opposite complexity. In such cases, maintainability becomes a problem. Further, when a plurality of display operation devices access the same protection control device at the same time, there is a sixth problem that the processing load on the protection control device increases and the response becomes slow in order to respond.

Further, in such a remote operation system, there is a possibility that various functions are required for the protection control device. For example, protection, control, and measurement of the power system have conventionally been separated as separate devices. However, it is conceivable to combine these functions as the same device. In such a case, the processing to be stored in the protection control device increases,
There is a seventh problem that an excessive burden is caused in terms of reliability and maintainability.

Further, when the specifications of the protection control device are changed, it is general to stop the device and convert the ROM storing the program. However, this requires the reduction of the device operation rate and the complexity of the change work. There are eight problems.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. In a monitoring and control system for connecting a plurality of protection control devices and a display / operation device via a communication network, it is required that each device is connected to the communication network. Use
Focusing on the movement of program modules in the system and the coordination function between each device, this system is a power system protection control system with excellent operability, economy, maintainability, and reliability, without increasing the load on the communication network. It is an object of the present invention to provide a recording medium on which a program to be executed is recorded.

[0020]

[0021]

A power system protection control system according to a first aspect of the present invention includes a plurality of protection control devices that receive a state quantity of a power system, convert the state quantity into digital data, and perform protection control of the power system. And a display operation device connected to the protection control device via a communication network and performing a display operation for monitoring the operation and state of each protection control device, wherein at least one of the protection control device One was provided with the following first and second regions. First area: Performs protection calculation processing of a power system without being directly connected to a communication network to perform protection or control of the power system. A second area: transmitting and / or receiving a program module in which a description of data from a display operation device and another protection control device and a procedure for processing the data via a communication network is integrated, and Transmission and reception of information with one area are performed.

According to a second aspect of the present invention, in the power system protection control system according to the first aspect, the display operation device integrates a description of data and a procedure for processing the data in accordance with the content of the display operation. A program module sending means for sending a program module to the protection control device via the communication network is provided, and the following three means are provided as a second area of the protection control device. Program module receiving means: Receives, via the communication network, a program module in which a description of data and a procedure for processing the data is integrated from the display operation device or another protection control device. Execution means: executes the received program module. Transfer means: Transfers a program module in which the execution result of the execution means or the description of the data and the procedure for processing the data stored in another protection control device are integrated to the display operation device or another protection control device. I do.

According to a third aspect of the present invention, in the power system protection control system according to the first aspect, the display / operation device integrates a description of data and a procedure for processing the data corresponding to the content of the display operation. A program module sending means for sending a program module to the protection control device via the communication network is provided, and the following three means are provided as a second area of the protection control device. Program module receiving means: Receives, via the communication network, a program module in which a description of data and a procedure for processing the data is integrated from the display operation device or another protection control device. Executing means: transfers information obtained in the first area to the program module received by the program module receiving means. Transfer unit: transfers the program module storing the execution result of the execution unit to the display operation device or another protection control device.

According to a fourth aspect of the present invention, in the power system protection control system according to the first aspect, at least one second area of the plurality of protection control devices is configured to display and change data in these devices. Control symbol sending means for sending control symbols for controlling the layout structure of the corresponding display screen on the display operation device side together with data representing the operation and state of the device; and the display operation device includes the control symbol sending means. And a control symbol interpreting means for interpreting the control symbols sent from the PC and displaying the data in a layout corresponding to the control symbols.

According to a fifth aspect of the present invention, in the power system protection control system according to the first aspect, at least one second region of the plurality of protection control devices includes another protection control device other than the self protection control device. Other device display control symbol sending means for sending a control symbol for performing the data display of the device together with data representing the operation and status of the device, and the corresponding data of the corresponding protection control device in response to a request for display of another device from the display operation device. A data search / transmission unit for searching and transmitting the data to the display / operation device; and a control signal transmitted from the other device / display control symbol transmission unit in the display / operation device for interpreting the corresponding control signal. Other device display control symbol interpretation request means for making a data transmission request to the control device, and the corresponding data of another protection control device from the data search and transmission means,
Another device data transmission means for transmitting the request to the corresponding protection control device that issued the request is provided.

According to a sixth aspect of the present invention, in the power system protection control system according to the first aspect, at least one second area of the plurality of protection control devices includes a display operation content of the display operation device. Provided is a program module sending means for transferring a corresponding program module integrating data and a procedure for processing the data to the display / operation device side via a communication network. A receiving means for receiving the program module and a program module executing means for executing the received program module are provided.

According to a seventh aspect of the present invention, in the power system protection control system according to the first aspect, the protection control device connected via a communication network includes a program module in which data and a procedure for processing the data are integrated. A program storage unit having a program module sending unit for supplying, a receiving unit for receiving the program module from the program module sending unit in the protection control device, and an execution unit for executing the received program module. Provided.

[0029]

[0030]

[0031]

A recording medium according to an eighth aspect of the present invention has a plurality of protection control devices which receive a state quantity of a power system, convert the state quantity into digital data and perform protection control of the power system, A storage medium applied to a power system protection control system, comprising: a display operation device connected to a device via a communication network and performing a display operation for monitoring operation and status of the protection control device; At least one of the control devices is a recording medium that records a computer-readable program for executing the functions of the following first and second areas. First area: Performs protection calculation processing of a power system without being directly connected to a communication network to perform protection or control of the power system. A second area: transmitting and / or receiving a program module in which a description of data from a display operation device and another protection control device and a procedure for processing the data via a communication network is integrated, and Transmission and reception of information with one area are performed.

[0033]

[0034]

[0035]

[0036]

[0037]

[0038]

FIG. 1 is a block diagram showing a first embodiment of a supervisory control system according to the present invention. 1, 10 as input state quantity S ₁ from the power system 1 is a protective control object, a digital protective control apparatus for performing protective control of the electric power system protective control output to the power system as C _1, It comprises a program module receiving means 11, an execution means 12, an execution result and a program module return / transfer means 13.

The display / operation device 20 is connected to a communication network 30.
A plurality of remote operations, such as the digital protection and control device 10 and the other device 40 having the same configuration, are performed via the communication device. Here, the digital protection and control device 40 is described for the description of the present embodiment, and is not a basic component of the present invention.

First, as the operation, a program module corresponding to the content of the display operation is transmitted by the display operation device 20 via the communication network 30 by the program module transmission means 21. For example, as shown in FIG.
Each program module corresponding to each item of the remote operation menu indicated by is sent. This is the second embodiment.

Here, the program module is an integrated unit of data and a description of a procedure for processing the data.
For example, in the case of the setting menu described above, the data is set values corresponding to each protection control method, and the procedure is a procedure for storing those set values in a predetermined memory of the protection control device. Relay operation, control operation, monitoring processing, diagnostic processing, display processing, analysis processing, and the like are conceivable.

The transmitted program module is received by the program module receiving means 11 in the digital protection and control device 10 via the communication network, and is executed by the execution means 12. FIG. 3 summarizes the flow of the program module sending, receiving, and executing processes in this case.

As shown here, the settling program module sent from the display / operation device includes the set value data to be set and the procedure (for example, in which memory the set values are stored, which set resides in the protection control device). , Etc.), a detailed process relating to the settling process is performed in the protection control device. That is, RAM, EEPROM (new), EEPROM
Processing is performed on hardware resources in the protection control device such as (old).

Conventionally, as shown in FIG. 19, such an exchange is performed between the display operation device and the protection control device. However, a setting program module incorporating these processes is moved to the protection control device side and executed. Therefore, the load on the communication network is reduced as compared with the related art. In addition, the operator only needs to provide a new set value to the display / operation device, and an operation for sending each request to the protection control device as in the related art is not required.

After the execution of the program module by the execution means 12, the execution result or the program module is processed by the execution result and the program module return / transfer means (hereinafter referred to as return / transfer means) 13. For example, in the case of the above-described settling module, the setting is returned to the display operation device 20 via the communication network 30 as to whether the setting is good or the set value is not within a predetermined range and is not appropriate. This is the third embodiment.

It is also conceivable that the setting operation is performed for a plurality of protection control devices with the same contents. In this case, the return / transfer means 13 is used to transfer the settling program module to another protection control device 40. In the protection control device 40, means 41, 42, and 43 similar to those in the protection control device 10 described above are provided. The execution result is displayed and displayed by the return / transfer means 43.
Or the setting program module is transferred to another protection control device, and the same processing is performed thereafter.

FIG. 4 shows a specific configuration example according to the fifth embodiment of the present invention. The digital protection controller 10 includes an analog-to-digital converter 10-1 and a digital arithmetic processor 10
-2 and I / O interface 10 with external devices such as circuit breakers
-3, a communication interface 10-4 for interfacing the communication network 30 with the apparatus, and a bus 10-5. The units 10-1 to 10-4 are interconnected via a bus 10-5.

The analog-to-digital converter 10-1 includes an analog filter, a sampling and holding circuit, a multiplexer, an analog-to-digital converter, and the like. After being taken in as information and held at a predetermined sampling interval, it is converted into a digital quantity.

On the other hand, the digital operation processing unit 10-2 has a CPU
2-1, RAM 2-2, ROM 2-3, nonvolatile memory EE
The electric quantity data, which is constituted by a PROM 2-4 and is digitally converted, is sequentially transferred to the RAM 2-2, and the data and the set value of the protection relay stored in the EEPROM 2-4, from the RAM 2-2 and the ROM 2-3 are read out. CPU2-1 performs various protection control calculations by the above program.

Here, the difference from the conventional protection control device is that a part of the program is also sent to the RAM 2-2 from the communication network and processed as a program in the digital arithmetic processing unit. In the past, the program was fixedly written in the ROM2-3.
It is a feature of the present invention that the program module is sent from the communication network to 2 and transferred to the RAM of another device. Further, it is also possible to transfer the data of the received program module to the power system side by executing means. The digital operation processing section 10-2 constitutes a part of the execution means 12, the reception means 11, and the return / transfer means 13 described above.

In other words, the function of the execution means 12 is not only to execute the contents based on the sent program module, but also to pass the state quantity S ₁ from the power system 1 to the program module, for example. . For example, the state quantity is stored in the RAM of the digital arithmetic processing unit 10-2 in FIG.
When the program module is received, the execution means 12 passes the state quantity of the power system to the program module. or,
Similarly, the protection control output C ₁ calculated by the digital processing unit 10-2 may be stored temporarily in RAM2-2 like, can also be passed to the program module. This point is the fourth
Of the embodiment.

Next, the input / output interface 10-3 is an interface for taking in the state of the external control device such as circuit breaker information, and outputting to the external device such as protection relay operation, return output, and trip command. Further, the communication interface 10-4 is one of the features of the present invention, and for example, as shown in the figure, connects the Ethernet LAN to the protection control device. Part of the program module receiving means 11 and the return / transfer means 13 described above are realized by the present communication interface.

That is, the program module from the communication network is received here and transferred to the above-mentioned RAM 2-2. The program module executed by the digital processing unit 10-2 is sent to the communication network 30 via the communication interface 10-4, and is transferred to the display / operation device 20 or the protection control device. The above is a specific configuration example of the digital protection and control device.

As a configuration example of the communication network, as shown in FIG. 4, a network for connecting a protection control device in a local range such as a substation by an Ethernet LAN is connected to a personal computer or a workstation at a manned electric station or the like. It is composed of a network such as an Ethernet LAN and a wide area network connecting both networks in a wide area.

The configuration of the Ethernet LAN is a general one, and the description is omitted. In addition, a circuit switching network such as a telephone line is used as the wide area network. The display operation device 20 described above is realized by the personal computer shown in FIG. The program module sending means is realized by software in a personal computer and an interface circuit with an Ethernet LAN.

Next, the operation of the present invention will be described in detail with reference to the flowchart of FIG. First, a flowchart on the personal computer side will be described. The above-mentioned remote operation menu is displayed on the screen of the personal computer, and the operator sets the corresponding item in the remote operation menu to S1-
Select with 1. For example, if the setting operation is selected, S
Call the setting program module in 1-2.

In step S1-3, the operator sets the setting program module in the setting program module name, the setting change element name,
Give data such as set values. In S1-4, the setting program module stores these data in itself,
Sent to the communication network. The above is the details of the program sending means.

Next, the protection control device side receives the sent settling program module in S2-1, and
To be stored. This corresponds to the receiving means 11. In step S2-2, the setting program module writes the set values sequentially to the RAM, the EEPROM (new), and the EEPROM (old) while checking them as described above. The above corresponds to the execution means 12.

Conventionally, such an EEPROM, R
Although the exchange of data and requests between the AM and the settling process is performed via the communication network each time, as described above, in the present invention, all of them are completed in the protection control device. Based on the result, the execution result is determined in S2-3, and a failure (for example, EEP
If the writing to the ROM or RAM is incomplete and the predetermined value is not written, etc.), it is necessary to settle again, so the failure result and the program module are returned to the display / operation device 20 in S2-4.

If the execution result is good, and if it is not necessary to settle to another device in S2-5, the completion result and the program module are returned to the display operation device 20 in S2-6. If it is necessary to settle to another device, the name of the other device described in the setting program module is read in S2-7, and the setting program module is sent out with the device name as a destination. S2-3 to S2-7 are return / transfer means
Equivalent to 13.

According to the above embodiment, the program module corresponding to the task performed by the operator is sent from the display / operation unit to the protection control device via the communication network, and is executed in the protection control device. The traffic on the communication network can be reduced, and the reliability can be improved.
In addition, since there is no need to perform operations corresponding to each request or perform the same job for a plurality of devices as in the conventional case, the amount of work required by the operator can be reduced, and protection with high economic efficiency and high reliability can be achieved. A control system can be provided.

FIG. 6 is a block diagram showing a fifth embodiment of the digital protection and control system. In FIG. 6, 10
As input the state quantity S ₁ from the power system 1 is a protective control object, a digital protective control apparatus for performing protective control of a power system, having a control symbol sending means 14. or,
The display / operation device 20 performs remote operation of the digital protection and control device 10 via the communication network 30 and has control symbol interpretation means 22. The invention according to the present invention is characterized by a mechanism for controlling the layout structure of the display screen when various data in the protection control device is displayed or changed on the screen of the display operation device 20.

FIG. 7 shows a specific example. FIG. 7 shows an example in which a current value obtained from the power system is displayed, and the effective values of two current values Ia and Ib are displayed. In this case, the current value is measured numerical data that changes with time. As shown in the figure, the control symbol sending means combines the data described as the control symbol table with the current value data, and sends the data to the display / operation device in a format in which control symbols are added to each data. Here, character data I is used as the item name.
A control symbol "character" is added corresponding to a and Ib. Further, control symbols such as “numerical value”, “with frame”, “effective number of digits 5”, and “line feed” are added to the effective values of Ia and Ib as changing numerical information.

The display operation device interprets the data and the control symbol table received by the control symbol interpretation means and the control symbol table of the display operation device to determine in what form and how to arrange each data on the screen. Display. In this example, as shown in the figure, the item names Ia and Ib are interpreted and displayed as character codes, respectively, because the control symbol is "character". Also, the numerical data is treated as numerical information, and is displayed with a frame within 5 significant digits. A line feed is performed by a line feed control symbol. In this way, the display of the electric quantity data is performed.

As another example, in the setting value change screen shown in FIG. 8, the protection control device side sets the setting element names as 27 and 64.
Is sent. The addition of a control symbol "character" to this is the same as in the above-described example of the electric quantity. As for the set value, control symbols “numerical value”, “with digits”, “number of significant digits”, “number specification”, and “line feed” are added to the current set value data (for example, 90, 35).

As a result, the display screen after interpretation on the display operation device side is as shown in the figure, and the current set value is displayed within four digits for each set element. Further, the current set value can be changed to a new set value by a control symbol designated by a numerical value. In this way, not only the current data of the protection control device is displayed, but also the designation of the data rewrite location can be made by adding the control symbol.

The specific configuration is the system configuration shown in FIG. Here, the above-mentioned control symbol sending means is ROM 2-3.
The control symbol table is also stored in the ROM 2-3 similarly. Further, as the electric quantity data, data obtained by subjecting the instantaneous current value data transferred to the RAM 2-2 from the analog-to-digital converter 10-1 to the RAM 2-2 in response to a request from the display / operation device 20 to an effective value calculation by the CPU 2-1 is used.

As described above, the set value data is EEPR
Use the one stored in the OM. The display operation device 20 is realized by a personal computer or the like, and the control symbol interpretation means is also realized by software of the personal computer.

According to the present embodiment, when a plurality of protection control devices are remotely operated by one personal computer via a communication network, differences in the contents of each protection control device, for example, the amount of system electric power taken in It is not necessary to configure display software on the personal computer side in consideration of the number of symbols, the number of setting elements, the number of digits, and various layouts such as frame display.

This is because a control symbol for layout is added to the data to be displayed or changed on the protection controller side, and the display can be performed only by providing only the software for interpreting this on the personal computer side. Therefore, there is an advantage that the software scale of the personal computer is not increased and the economy is excellent.

In the past, if the contents of the protection control device were changed due to a change in the production specifications, etc., the software of the personal computer had to be changed correspondingly. Can be modified, and the reliability is improved. In addition, even if a large number of personal computers are used, one kind of software is required.
There is an advantage that maintenance for an increase in the number of types of protection control devices is easy, and the cost is excellent. Although FIGS. 7 and 8 show examples of control symbols, the present invention can be applied to all control symbols that determine the display layout structure, and the effect is the same.

FIG. 9 is a block diagram showing a sixth embodiment of the digital protection and control system. In FIG. 9, 10
As input state quantity S ₁ from the power system 1 is a protective control target is a digital protective control apparatus for performing protective control of a power system, freshly added in this embodiment, other devices display control Symbol sending means 15 and data search sending means 16. The display operation device 20 is a communication network.
The remote operation of a plurality of devices such as the digital protection and control device 10 and the device 40 having the same configuration through 30 is performed.
It has another device display control symbol interpretation requesting means 23.

The operation will be described with reference to FIG. In FIG. 10, the remote operation of the two protection control devices 10 and 40 having the above configuration is performed by one display operation device 20, and the amount of system electric power taken in by both devices is displayed on the same screen in the magnitude of the current of both devices. Are displayed in a form that can be compared with each other.

First, the device 10 is sent from a personal computer.
In response to the request, the device 10 responds to this request, and the device 10 responds to the request by sending the data (effective current value) Ia, Ib,
Send Ic. At the same time, the other device display control symbol sending means 15 sends the control symbol "other device name: device
40 ”“ Data identification: Effective current value ”is sent.

The display operation device 20 interprets the control symbol by the other device display control symbol interpretation means 23 and requests the device 40 for the effective current value. The device 40 that has received the request retrieves the current effective value data Ia, Ib, and Ic by the data retrieval and transmission means 46, and transmits this to the display operation device 20. The display screen is as shown in this figure.

The operation flow of the display operation device 20 at this time is shown in FIG.
See Figure 11. In FIG. 11, first, the data sent from the device 10 is sequentially interpreted in S3-1, and the electric quantity data relating to the device 10 is displayed in S3-2. In S3-3, the other device display control symbol included in the transmitted data is interpreted, and a request signal is transmitted from the device name to the device 40, which is the corresponding device. S3-4
Waits for the data to be sent from the device 40 in S3-5.
The screen is displayed at the timing received by.

According to the present embodiment, when viewed from the operator, data of two different devices can be displayed as if they were data in the same device. Conventionally, when acquiring data from a different device, the operator had to start over from the communication connection and the operation was complicated. In this case, the operation is easy, and the reliability and operability are excellent.

Further, since such a control symbol is provided on the protection control device side, the same effect as the above-mentioned claim 2 can be expected. Furthermore, by adding the control symbol for determining the name of the other device and the data type to the display data of the target protection control device, the data of the plurality of devices is connected when viewed from the operator. Display and operation can be performed. This is a very effective means for data collection, data comparison, and analysis of power system protection control devices installed in a wide range.

Further, the system configuration is as shown in FIG. Here, the other device control symbol transmission means described above is realized by a program written in the ROM 2-3, and the control symbol table is also stored in the ROM 2-3. The electric quantity data used is transferred from the analog-to-digital converter 10-1 to the RAM 2-2 in response to a request from the display operation device 20.

The display operation device 20 is realized by a personal computer or the like, and the control symbol interpretation means is also realized by software of the personal computer. In the above example, the current effective value is specified as the data type for the control symbol.
The effect is the same when only the other device name is specified as the control symbol without specifying the data type.

That is, while the data of the selected device is being confirmed on the screen, connection with another device can be automatically performed, and the amount of operation can be reduced as compared with the conventional case. Further, in the above-described flowchart, the other device data is automatically acquired as S3-3. However, the same effect can be obtained in a case where the acquisition is performed after an operator's instruction is obtained at the time of acquisition.

FIG. 12 is a block diagram showing a seventh embodiment of the digital protection and control system. In FIG. 12, 10
As input state quantity S ₁ from the power system 1 is a protective control target is a digital protective control apparatus for performing protective control of a power system, the newly added ones in the present embodiment, the program module transmits Means 17. The display operation device 20 is for remotely operating the digital protection and control device 10 via the communication network 30, and has a program module receiving means 24 and a program module executing means 25.

The operation is as follows. First, contents (menu items and the like) to be displayed and operated by the display operation device 20 are transferred to the protection controller
Then, the protection control device 10 selects a program module corresponding to the sent item using the program module sending means 17 and sends it to the display / operation device 20. The display operation device 20 receives this program module
The data is received by 24, executed by the execution means 25, and the result is displayed.

For example, a plurality of electric quantities,
For example, when displaying the effective values and phases of three phases of voltage and three phases of current, the sending means 17 selects an electric quantity display program module as a program module corresponding to a selection item of the remote operation menu. It is assumed that the protection control device has a correspondence table for selecting which module is to be selected for which item.

This electric quantity display program module calculates and displays the effective values and phases of three phases of voltage and three phases of current, and displays the instantaneous values of the current and voltage obtained from the analog-to-digital converter 10-1 shown in FIG. The effective value and phase are calculated from the values.

This program module is displayed on a display / operation device.
It is a feature of the present invention that the process is moved to 20 and executed on the display operation device side. Thus, when the current / voltage instantaneous value data is sent to the display operation device as shown in FIG. 13,
Using this, the calculation of the execution value and phase is performed by the program module and displayed.

The specific configuration is the system configuration shown in FIG. Here, the above-mentioned program module sending means
17 is realized by the program written in ROM2-3,
Similarly, the program module to be selected is also RO
It is stored in M2-3. The display operation device 20 is realized by a personal computer or the like, and the program module receiving means and the program module executing means are also realized by the software of the personal computer.

The method of calculating the execution value and phase of the electric quantity may differ depending on the contents of the protection control device. For example, the analog-to-digital converter 10-1 may have hardware with different sampling intervals, such as those having an electrical angle of 30 degrees, 15 degrees, 7.5 degrees, and 3.7 degrees.
There are 5 times and so on. Therefore, the calculation for obtaining the execution value and the phase using the instantaneous value data sampled at such a sampling interval is naturally different (for the method of calculating the execution value and the phase from the AC instantaneous value data, see Izumi Mitani) It is described in Ohm's “Digital Relay Practical Reader” etc.)

Therefore, when a plurality of devices to be remotely operated include such different analog-to-digital converters, it is necessary for the display / operation device to prepare all the corresponding electric quantity display modules in the display / operation device. Although there is a problem in economy due to large scale, according to the present invention, the related program module is transferred from the protection control device and executed only when necessary, so that the present invention is excellent in economy.

In the present embodiment, the display of the quantity of electricity has been described. However, the present invention has the same configuration and the same effect as the other processes, for example, the processes depending on the device configuration and the protection control method such as the display of the device operation contents. Also, as compared with the case where this program module is executed in the protection control device, the load on the CPU of the protection control device can be reduced by executing the program module in the display operation device.

In particular, when a plurality of display / operation devices connected to the communication network make a request to the same protection control device, if the program module is executed on the protection control device, the processing is congested and sufficient responsiveness cannot be obtained. In some cases, however, in the present invention, the necessary program modules are moved and executed in each personal computer, so that the system can be configured without increasing the scale of the protection control device.

FIG. 14 is a block diagram showing an eighth embodiment of the digital protection and control system. In FIG. 14, 10
As input state quantity S ₁ from the power system 1 is a protective control target is a digital protective control apparatus for performing protective control of a power system, the newly added ones in the present embodiment, the program module received Means 18 and execution means 19. The program storage device 50 is connected to the communication network 30.
The program module is supplied to the digital protection and control device 10 via a program module.

The operation is as follows. First, the program module sending means 51 is designated by the operator of the program storage device 50 according to the program specification of the target protection control device.
To select the necessary program module and send it to the protection controller. The protection control device 10 receives and executes this program module.

The specific configuration is the system configuration shown in FIG. Here, the above-mentioned program module receiving means
18 is realized by the program written in ROM2-3,
The received program module is stored in the RAM 2-2. The program storage device 50 is realized by a personal computer or a workstation, and the program module sending means 51 is also realized by this software.

In recent years, the protection control device has become multifunctional, and in addition to the protection / control function, a function such as measurement of the state of the power system or location of an accident point may be included. In such a case, conventionally, all the functions to be used are stored in advance in the ROM 2-3 as a program, and these are always executed. However, in the present invention, necessary program modules are stored in the program as needed. It was supplied from the device.

The supplied program module is RAM
2-2, and the CPU 2-1 calls and executes the program module from here. For example, when it is necessary to measure the state of the power system, a measurement program module is supplied to the protection control device and executed. When an accident occurs, a location program module is supplied to specify the location where the accident has occurred.

Conventionally, when it is necessary to change or add a program module in order to change the specification or improve the function of the protection control device, the program module is stored in the ROM.
Since it is stored in 2-3, it was necessary to replace the ROM itself, so that the device had to be stopped and replaced. As a result, a reduction in the operation rate of the apparatus occurs, but in the present invention, the change and addition of the program module can be easily performed via the communication network.

According to the present embodiment, it is possible to easily and efficiently add or change the functions of the protection control device, and since only the necessary functions need to be resident in the protection control device, the protection control device can be used. No need to increase the scale, economical,
An excellent system can be provided in terms of reliability and maintainability.

FIG. 15 is a block diagram showing a ninth embodiment of the digital protection and control system. In FIG. 15, 10
Is a digital protection controller for performing protection control of the power system by inputting the state quantity S1 from the power system 1 to be protected and controlled, the control symbol transmitting means 14, the other device display control symbol transmitting means 15, the data search The transmission means 16 and the program module transmission means 17 are defined as area 1, and the program module reception means 11, the execution means 12, the execution result and program module return / transfer means 13, the program module reception means 18 and the execution means 19 are defined as area 2, and the communication is performed. A region which is not directly connected to the network and performs a protection control operation is configured as three regions, which is a region 3.

The area 3 is in charge of the main protection function. Therefore, regardless of the system change, it is necessary to minimize the accident propagation, and high-speed arithmetic processing is performed. The execution means 12 in the area 2 is a back-up protection function mainly for the purpose of backing up the area 3, and is performed according to information (voltage, current, circuit breaker state, generator state, etc.) connected to the network. For example, a signal for minimizing the accident range is calculated for a power plant and transmitted via a network.

Therefore, the calculation speed may be low. Since it is basically for backup, it is sufficient that one back-up protection program module circulates around the network periodically (although it may always be set in the area 2, but it is not always necessary to store it so much. Also, if the information is always stored, the load on the area 2 will be somewhat increased.)

The function of the execution means 12 is not only to execute the program module based on the sent program module, but also to pass the state quantity S ₁ from the power system 1 to the program module, for example. . For example, when the program module is received in the area of the RAM 2-2 of the digital arithmetic processing unit 10-2 in FIG. 4, the execution means 12 transfers the state quantity of the power system 1 to the program module. is there.

[0103] Similarly, the protection control output C ₁ calculated by the digital processing unit 10-2 may be stored temporarily in RAM2-2 like, may also be so passed to the program module. Although no specific calculation is described as a program module, for example, protection relay calculation, control calculation, monitoring processing, diagnostic processing, display processing,
Analysis processing is also possible.

In the above description, it has been described that the area 3 has main protection, and the area 2 has a backup protection function for the purpose of backing up the area 3. However, the minimum necessary relationship / function between the area 3 and the area 2 is as follows. The point is that the results can be exchanged without interfering with each other.

The area 3 is not limited to the above description. The object to be protected or controlled (the power system in the case of a relay, the reception of coins in the case of a vending machine, and the time required for output and sale of coins). Needless to say, it may have a function of responding (without delay). Further, the area 2 is a function for executing the program received from the network reliably and safely. More specifically, it is sufficient to determine whether the received program can be executed or is safe to execute. Sex is not severe.

The display / operation device 20 is connected to the communication network 30.
The remote operation of a plurality of devices such as the digital protection control device 10 and the device 40 having the same configuration is performed via the. Although not shown, the program module sending means 21,
Control symbol interpretation means 22, other device display control symbol interpretation means 23,
It has a program module receiving means 24 and a program module executing means 25 corresponding to the means of the protection control device described above. The program storage device 50 is a communication network.
30 and a program module sending means 51 (not shown).

The present invention is characterized in that each of the above-described embodiments is collectively configured as the above-described three regions as a configuration method when configuring a protection control device. That is, in the area 1, the information is passively provided to the display operation device, and there is no change in the processing in the protection control device. In the area 2, the display operation device and other protection control devices are changed. This is an area in which information is actively exchanged with the program storage device, and processing changes and additions in the protection control device are actively performed. Area 3 has no direct connection to the communication network and is not affected by the communication network.

In the conventional apparatus, there is little close connection with other apparatuses via the communication network as in the present invention. In contrast, in the present invention, as described in each claim, there is a close connection with another device. Also, comparing the protection control calculation of the power system and the data display processing in the protection control device, the former tends to require more real-time properties. Region 2
Since the program module often stores or stays on the RAM, the memory capacity is larger than other areas. Therefore, it is necessary to adopt a configuration corresponding to the characteristics of each means. These are the three areas proposed in the present embodiment.

FIG. 16 shows a specific configuration example. In FIG. 16, the analog-to-digital converter 10-1, the input / output interface 10-
3. The communication interface 10-4 is the same as that of FIG. 4, and the feature of this embodiment is that the digital operation processing unit 10-2 is divided into three. The processing of each of areas 1, 2, and 3 is 2-
A, 2-B and 2-C are assigned to the digital operation processing unit.

Areas 1 and 2 have digital data processing units 2-A and 2-A because data is exchanged with the communication interface.
-B is a form that can be connected to the communication interface both in hardware and software. The 2-C has a configuration in which hardware and software are considered so as not to be connected to the communication interface. Specifically, the connection between each arithmetic unit and the communication interface can be controlled by the contents of the program stored in the ROM in each arithmetic processing unit and the limitation of the interface unit between each arithmetic processing unit and the system bus.

As described above, by separating the three areas in terms of hardware, a program module erroneously entered from the communication network does not affect the protection control operation unit of the area 3 and security is ensured. it can.
In addition, a high-speed CPU is used in the area 3 where real-time performance is required because each CPU is divided.
A low-speed CPU can be used for the arithmetic processing unit 2 and an economical configuration can be realized. In addition, a RAM can be used in the area 2 to store program modules.

According to the present embodiment, security for the protection control function can be ensured irrespective of a system that is densely connected to another device via a communication network, and optimal hardware resources for each means are provided. , It is possible to provide a protection control system excellent in reliability and economy.

FIG. 17 shows a different configuration example. In FIG. 17, FIG.
A new bus 10-6 is provided for the configuration (1), and the digital operation processing unit 2-A is completely separated from the communication interface 10-4. 2-B and 2-C are communication interfaces 10-4 and 10-4.
Connected to both -5. The effect of this is the same as the above-described configuration, and the description is omitted.

The present invention is not limited to a power system, and for example, a state quantity from a device to be controlled or monitored, such as a distributed control system, is used to control the device. Or, a device having a plurality of arithmetic functions for monitoring, and a display operation device connected to each of these devices via a communication network and performing a display operation for monitoring the operation and operation of each device (or can be operated on each device) And a program storage device that stores various program modules). In this case, in the above embodiment, the protection control device may be replaced with a device having an arithmetic function.

[0115]

As described above, according to the digital protection and control system of the present invention, by utilizing the fact that each device is connected to the communication network, the movement of the program module in the system and the communication between the devices can be performed. Focusing on the coordination function, a digital protection and control system with excellent operability, economy, maintainability, and reliability can be provided.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a supervisory control system according to first to fourth embodiments of the present invention.

FIG. 2 is a view showing the correspondence between a screen display menu and program modules in FIG. 1;

FIG. 3 is a diagram for explaining processing of a settling operation;

FIG. 4 is a diagram showing a specific configuration example of FIG. 1;

FIG. 5 is a flowchart showing the processing contents of FIG. 1;

FIG. 6 is a configuration diagram of a digital protection and control system according to a fifth embodiment.

FIG. 7 is a view showing a specific example of FIG. 6;

FIG. 8 is a view for explaining the operation of FIG. 6;

FIG. 9 is a configuration diagram of a digital protection and control system according to a sixth embodiment.

FIG. 10 is an operation explanatory diagram of FIG. 9;

FIG. 11 is a flowchart showing the processing contents of FIG. 9;

FIG. 12 is a configuration diagram of a digital protection and control system according to a seventh embodiment.

FIG. 13 is a view for explaining the operation of FIG. 12;

FIG. 14 is a configuration diagram of a digital protection and control system according to an eighth embodiment.

FIG. 15 is a configuration diagram of a digital protection and control system according to a ninth embodiment.

FIG. 16 is a diagram showing a specific configuration example of FIG. 15;

FIG. 17 is a diagram showing another specific configuration example of FIG. 15;

FIG. 18 is a menu example of a remote operation system.

FIG. 19 is a diagram showing the operation of a conventional system.

FIG. 20 is a diagram illustrating a configuration example of a conventional system.

FIG. 21 is a configuration example of a remote operation system.

[Explanation of symbols]

1 Power system 10, 40 Digital protection controller 11, 18, 24, 41 Program module receiving means 12, 19, 42 Execution means 13, 43 Execution result and program module return / transfer means 14 Control symbol sending means 15, 45, etc. Device display control symbol transmission means 16, 46 Data search transmission means 17, 21, 51 Program module transmission means 20 Display / operation device 22 Control symbol interpretation means 23 Other device display control symbol interpretation means 25 Program module execution means 30 Communication network 50 Program storage apparatus

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H02H 3/00 H02H 3/02 H02J 3/00 H02J 13/00

Claims (8)

(57) [Claims] 1. An input of a state quantity of an electric power system,
Convert to digital data and perform power system protection control
A plurality of protection controllers and communication networks between these protection controllers and
The operation of each protection control device connected via a network
Display operation device that performs display operations for operation monitoring
A power system protection control system comprising:
At least one of the protection control devices includes a first and a second
Electric power system protective control system comprising the area. Note 1st area: Connect directly to the communication network.
Power system protection calculation processing, and
Provide protection or control. Second area: display operation device via communication network;
Data from other protection controllers and the procedure to process it
Of a program module integrating the description of
And / or receiving at least one of the first
Sends and receives information from the area. 2. A power system protection control system according to claim 1.
The display operation device corresponds to the contents of the display operation
The description of the data and the procedure to process it
Via the communication network
Program module to be sent to the protection control device
And a second area of the protection control device.
And a power system protection control system comprising the following three means: The program module receiving means: the communication network
Via the display operation device or another protection control device
Description of data from the device and the procedure to process it
Receives the coded program module. Executing means: executing the received program module
You. Transfer means: execution results of the execution means or other storage
Data and the hands that process it
The program module that integrates the description with
Transfer to the indicating operation device or another protection control device. 3. The power system protection control system according to claim 1 , wherein the display / operation device integrates a description of data and a procedure for processing the data corresponding to the content of the display operation.
And a program module sending means for sending the program module to the protection control device via the communication network, and the following three means as a second area of the protection control device. system. Program module receiving means: Integrated description of data from the display operation device or another protection control device via the communication network and a procedure for processing the data.
Receives the coded program module. Execution means: information obtained in the first area is stored in the program
The program module received by the program module receiving means.
Hand over to the module. Transfer unit: transfers the program module storing the execution result of the execution unit to the display operation device or another protection control device. 4. The power system protection control system according to claim 1 , wherein at least one of the plurality of protection control devices is provided.
The second area is to display and change the data in these devices
At the time, the layout of the corresponding display screen on the display operation device side
Control symbols for controlling the structure are used to indicate the operation and status of the device.
Control symbol sending means for sending together with data representing
In addition, the display operation device is provided with
Interpret the transmitted control symbol and respond to the layer
Control symbol interpretation means for displaying the data at
A power system protection control system , characterized in that: 5. The power system protection control system according to claim 1 , wherein at least one of the plurality of protection control devices is provided.
In the second area, a protection control device other than the self-protection control device is provided.
The control symbol for displaying the data of the device is
Display control of other devices sent together with data indicating operation and status
Symbol sending means and request for display of other device from display operation device
Search and display the corresponding data of the corresponding protection controller by
Means for sending and receiving data to be sent to the operating device;
Sent from the other device display control symbol sending unit
Interpret the control signal that has been given and respond accordingly.
Other device display system that sends data transmission request to protection control device
From the symbol interpretation requesting means and the data search and sending means.
The corresponding data for the other protective control apparatus, corresponding coercive the requesting
A power system protection control system, characterized in that another device data transmission means for transmitting to another protection control device is provided. 6. The power system protection control system according to claim 1 , wherein at least one of the plurality of protection control devices is provided.
In the second area, the content of the display operation by the display operation device is described.
Integrated data and procedures to process it
Display program modules via communication network
A program module sending means for transferring to the operating device
The display module is provided with the program module.
Receiving the program module from the file sending means
Receiving means for executing the received program module
A power system protection control system, comprising: 7. The power system protection control system according to claim 1, wherein the protection is connected via a communication network.
Integrated data and procedures for processing it into the control unit
Program module for supplying program modules
Program storage means having a module sending means;
Protection control device from the program module sending means
Receiving means for receiving the program module of
And an execution unit for executing the program module . 8. A state quantity of an electric power system is input, and this is
Convert to digital data and perform power system protection control
A plurality of protection controllers and communication networks between these protection controllers and
Operation of the protection control device connected via a network
Display operation device that performs display operation for status operation monitoring
Applied to power system protection control system consisting of
A medium, wherein at least one of the protection control devices is
A computer that executes the functions of the first and second areas.
A recording medium that records a program that can be read. Serial first region: the communication network is this which directly are connected
Power system protection calculation processing, and
Provide protection or control. Second area: display operation device via communication network;
Data from other protection controllers and the procedure to process it
Send and of program module that integrates a description of the
And / or receiving at least one of the first
Sends and receives information from the area.