WO2014188507A1 - プロセスバス対応保護制御システム、マージングユニットおよび演算装置 - Google Patents
プロセスバス対応保護制御システム、マージングユニットおよび演算装置 Download PDFInfo
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- WO2014188507A1 WO2014188507A1 PCT/JP2013/064034 JP2013064034W WO2014188507A1 WO 2014188507 A1 WO2014188507 A1 WO 2014188507A1 JP 2013064034 W JP2013064034 W JP 2013064034W WO 2014188507 A1 WO2014188507 A1 WO 2014188507A1
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- merging unit
- process bus
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B15/00—Systems controlled by a computer
- G05B15/02—Systems controlled by a computer electric
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/05—Details with means for increasing reliability, e.g. redundancy arrangements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00034—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving an electric power substation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/18—Systems supporting electrical power generation, transmission or distribution using switches, relays or circuit breakers, e.g. intelligent electronic devices [IED]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/242—Home appliances
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
Definitions
- the present invention relates to a protection control system for a process bus, a merging unit, and an arithmetic unit, and more particularly to a merging unit for measuring the state of a power system and controlling a circuit breaker.
- the protection relay device when collecting information such as current and voltage from the power system, and when a failure occurs in the power system or power equipment, the protection relay device is used to detect the failure and disconnect the failure from the power system. It is used.
- a conventional digital protection relay device performs A / D conversion (analog / digital conversion: Analog to Digital) on an input current signal or voltage signal (analog signal), and then generates a digital waveform. Perform necessary calculations such as protection relay calculations using data to detect the occurrence of system faults.
- a distributed protection control system is a functionally distributed conventional protection relay device, and typically includes one or more merging units that collect information such as current and voltage from the power system. It is done.
- the merging unit generates a digital signal by A / D conversion from an input current signal or voltage signal (analog signal), further converts the generated digital signal into serial data, and outputs it through a communication line.
- the determination of the occurrence of a system fault or the like is performed based on the serial data by an intelligent electronic device (IED (Intelligent Electric Device)) (hereinafter also referred to as IED) connected through the communication line. .
- IED Intelligent Electronic Device
- the protocol of the serial data communication standard that the merging unit sends to the IED is defined in IEC 61850-9-2.
- a signal used to control other devices using an IED operation signal is transmitted in the form of a general object-oriented system event GOOSE (Generic Object Oriented System Event) signal.
- GOOSE Generic Object Oriented System Event
- the above-mentioned GOOSE signal is also used for control signals such as switching control of a circuit breaker installed in a substation by an output signal from the IED.
- control signals such as switching control of a circuit breaker installed in a substation by an output signal from the IED.
- the current and voltage signals from the merging unit are received and the results of protection and control calculations performed by the IED are used to control the devices directly from the IED using contact signals,
- a system is adopted in which the GOOSE signal is transmitted to the merging unit and the device is controlled from the merging unit.
- the former is a method that follows the method of the conventional system.
- the latter is a method adopted to reduce the cable wiring cost for connecting the control signal from the IED to the equipment by controlling from the merging unit installed in the vicinity of the equipment.
- Patent Document 1 discloses a prior art that uses the latter method and aims to improve the reliability of a transmission circuit.
- This prior art relates to a system in which a merging unit referred to as an integrated unit or a sensor unit is duplicated including a transmission line, and even when a failure occurs in a process bus or the like, protection can be interrupted in the event of an accident.
- JP 2002-315233 A paragraphs 0079 to 0081, 0343 to 0345 and FIG. 40
- the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a process bus compatible protection control system, a merging unit, and an arithmetic unit that are improved in reliability while suppressing an increase in cost. It is.
- One aspect of the present invention is a process bus-compatible protection control system that receives an analog signal obtained by measuring the state of a power system, converts it into a digital signal, and controls a trip signal for controlling a circuit breaker provided in the power system.
- a merging unit that outputs a signal, a computing device that determines the state of a trip signal based on a digital signal converted by the merging unit, a substation automation system device that performs at least one of monitoring and commanding, a merging unit, and a computing device And a station bus connecting the merging unit, the arithmetic device, and the substation automation system device.
- the process bus and the station bus are independent communication transmission paths.
- the arithmetic unit is configured to transmit a trip command for outputting a trip signal to the merging unit by both the process bus and the station bus.
- the process bus communication between the merging unit and the IED has a function capable of executing a system for improving the reliability of the control signal based on the calculation result in the IED using the station bus. Therefore, it is possible to realize a configuration that can cope with an abnormality in the process bus without duplicating the process bus itself.
- FIG. 10 It is a schematic diagram which shows the whole structure of a protection control system. It is a figure which shows arrangement
- FIG. It is a circuit diagram which shows the structural example at the time of connecting a contact in series. It is a circuit diagram which shows the structural example at the time of connecting a contact in parallel.
- FIG. It is the figure which showed the structure of DO control circuit 33 of FIG. It is the figure which showed the structure of the modification of FIG.
- FIG. 1 is a schematic diagram showing the overall configuration of the protection control system.
- a protection control system 1 is provided in a substation, a distribution station, etc., and collects information on the power system, and based on the collected information, processes such as protection, control, and monitoring of the power system Execute. More specifically, the protection control system 1 may be collectively referred to as a plurality of merging units 10-1 to 10-5 (hereinafter referred to as “merging units 10”) that collect information such as current and voltage from the power system. ) And a plurality of computing devices (Intelligent Electric Device: hereinafter also referred to as “IED”) 20-1 to 20-N (hereinafter, sometimes collectively referred to as “IED20”). .).
- IED Intelligent Electric Device
- a plurality of IEDs 20 are arranged according to applications (for example, for each protection target and each control target).
- IEDs by application include protection IEDs that realize protection functions for each protection target (for example, bus protection IED, transformer protection IED, line protection IED for each line, etc.) and control functions.
- a control IED to be realized is mentioned.
- the merging units 10-1 to 10-5 and the IEDs 20-1 to 20-N can physically communicate data with each other via a process bus PB according to a predetermined protocol.
- the process bus PB may be configured to transmit data using an electrical signal, but in the present embodiment, the process bus PB is configured to transmit serial data using an optical signal using an optical fiber.
- the station bus SB is also configured to transmit serial data using an optical signal using an optical fiber, but the process bus PB and the transmission protocol are different.
- Each merging unit 10 sends the collected information from the power system to the corresponding IED 20.
- the IED 20 executes processing such as protection, control, and monitoring of the power system based on information from each merging unit 10.
- the IED 20 determines whether a preset relay operation logic is established at a predetermined period, and when the relay operation logic is established, the merging unit that has jurisdiction over the corresponding circuit breaker A trip signal is output.
- this trip signal can be transmitted via either the process bus PB or the station bus SB.
- the IED 20 can output a command for turning on / off a switch in the power system as an example of a control function.
- a switch is a concept including a circuit breaker, a disconnector, and the like.
- the IED 20 can output the state of the power system such as current and voltage in real time as an example of the monitoring function.
- the IED 20 is connected to a substation automation system (SAS) device 46 and a remote monitoring control device 50 via a station bus SB.
- SAS substation automation system
- the IED 20 can also output power system information to the substation automation system device 46, and also output power system information to the remote control station 51 far from the target power facility via the remote monitoring control device 50. You can also For example, the IED 20 acquires time data indicating when the relay operation logic is established, that is, time data indicating when an abnormality such as an accident is detected from a timer (not shown), and an accident detection signal to which the time data is assigned is acquired. It is possible to transmit to the substation automation system device 46 and the remote monitoring control device 50 via the station bus SB.
- processing other than the above-described processing can be mounted on the IED 20.
- a function corresponding to the substation automation system apparatus 46 may be realized using the IED 20.
- the merging unit 10 is also connected to the station bus SB, and is configured to be able to perform data communication with the substation automation system device 46 and the remote monitoring control device 50 via the station bus SB.
- FIG. 1 as an example of power equipment, power is supplied to the primary side of the transformer 3 via the power transmission line 2 constituting the power system, and is obtained by voltage conversion (step-down) by the transformer 3.
- a plurality of distribution lines are connected to the bus 5, and power is supplied to the load via each distribution line.
- the protection control system 1 protects, controls, and monitors such power equipment.
- the power transmission line 2 is provided with a circuit breaker 6-1 which is a kind of switch, and a current transformer (CT) 7-1 (hereinafter collectively referred to as a current transformer 7). And a transformer for instrument (PT / Voltage Transformer: VT) 8-1 (hereinafter also collectively referred to as transformer 8).
- CT current transformer
- VT transformer for instrument
- the current transformer 7-1 measures information (current waveform) of the current flowing through the power transmission line 2.
- the voltage transformer 8-1 measures voltage information (voltage waveform) generated in the power transmission line 2.
- Information measured by each of the current transformer 7-1 and the instrument transformer 8-1 is input to the merging unit 10-1. Further, contact information that is binary data (binary signal) of the circuit breaker 6-1 is input to the merging unit 10-1 through a communication line (not shown).
- Binary data is binary data of 0: contact open, 1: contact close. That is, the merging unit 10-1 collects information on the current flowing through the power transmission line 2, information on the voltage generated in the power transmission line 2, and contact information of a switch such as the circuit breaker 6 provided in the power transmission line 2. . Although only the configuration of the circuit breaker is shown here, various switches such as a disconnecting switch are provided in the power transmission line.
- the supply line 4 is provided with a circuit breaker 6-2, a current transformer 7-2, and an instrument transformer 8-2.
- Information measured by each of the current transformer 7-2 and the instrument transformer 8-2 is input to the merging unit 10-2.
- contact information of the circuit breaker 6-2 is also input to the merging unit 10-2.
- a plurality of distribution lines are connected to the bus 5, and each distribution line is provided with a circuit breaker 6-3, 6-4, 6-5, and a corresponding load or an intermediate distribution path.
- Current transformers 7-3, 7-4, and 7-5 and instrument transformers 8-3, 8-4, and 8-5 are provided to detect the failure.
- Information measured by each of the current transformers 7-3, 7-4, 7-5 and the instrument transformers 8-3, 8-4, 8-5 is obtained from the merging units 10-3 to 10- for each distribution line. 5 respectively.
- contact information of the circuit breakers 6-3 to 6-5 is also input to the merging units 10-3 to 10-5, respectively.
- the merging units 10-3 to 10-5 open and close the information on the current flowing through each distribution line connected to the bus 5, the information on the voltage generated in each distribution line, and the circuit breaker 6 provided in each wiring line. Collect contact information of the vessel.
- FIG. 2 is a diagram showing an arrangement of the merging unit in the power system according to the embodiment of the present application. For the sake of easy understanding, FIG. 2 shows the basic configuration of one merging unit extracted from FIG.
- a current transformer 7 and an instrument transformer 8 are disposed on a power transmission line (or bus) 2.
- the measured values measured by the current transformer 7 and the instrument transformer 8 are input to the merging unit 10.
- the merging unit 10 outputs data obtained by converting the measured value to a digital value on a communication path called a process bus PB according to a predetermined protocol.
- the output data is input to the IED 20 that executes a protection or control operation.
- the IED 20 When the result calculated by the IED 20 satisfies a predetermined condition for control execution, the IED 20 outputs a control signal.
- the control signal is transmitted to the merging unit 10 via the process bus PB, and the control of the circuit breaker 6 and the like is executed by the contact output inside the merging unit 10 accordingly.
- the internal information of the IED 20 including the control signal of the IED 20 is connected to a communication line (referred to as a station bus SB different from the process bus PB) connected to the host substation automation system device 46. Further, since the station bus SB is also connected to the merging unit 10, the internal information of the merging unit 10 can be transmitted to the substation automation system device 46 and the like.
- device information such as the circuit breaker 6 is collected as binary data in the merging unit 10 and sent to the IED 20 and the substation automation system device 46 via the process bus PB or the station bus SB.
- the process bus is mainly used for the purpose of transmitting information on the substation main machine such as system current, voltage, and circuit breaker status to the IED.
- the station bus connects each device such as an IED and a merging unit to control each other, or communicates information on these devices to the substation automation system device 46, thereby converting the substation. It is used for the purpose of enabling monitoring of the substation by the automation system device 46. For this reason, the process bus has priority over the station bus from the viewpoint of protecting power transmission lines and the like which are most important in substation control.
- FIG. 3 is a block diagram showing a configuration of the merging unit 10 shown in FIG.
- the current / voltage waveform from the current transformer or voltage transformer is electrically insulated by the input conversion circuit 11 (11-1 to 11-g, g is the number of analog input channels), It is converted into an appropriate voltage signal inside the merging unit. Thereafter, the high-frequency component is removed by the analog filter circuit 12 (12-1 to 12-g), and then the voltage signal is input to the multiplexer circuit 13.
- the multiplexer circuit 13 sequentially outputs a plurality of analog input signals to the AD conversion circuit 14.
- the AD conversion circuit 14 sequentially converts analog input signals corresponding to the number of input channels into digital signals.
- the analog data processing unit 21 of the data processing unit 15 corrects errors caused by the input conversion circuit 11, the analog filter circuit 12, the AD conversion circuit 14, and the like. Further, the analog data processing unit 21 performs conversion processing from current and voltage values per sample quantity unit to data necessary as data to be placed on the process bus.
- the data processed by the analog data processing unit 21 is temporarily stored in the first memory circuit 22, and then the data is input to the format conversion circuit 23.
- the format conversion circuit 23 performs data conversion according to a protocol defined by the process bus.
- the data converted thereafter is converted into an optical signal by the transmission / reception circuit 16 that performs electrical / optical conversion via the A terminal of the first switching circuit 24 and then output to the process bus PB.
- the control signal of the merging unit output contact transmitted from the IED 20 via the process bus PB is a signal suitable for signal control by the transmission format restoration circuit 26 via the A terminal of the transmission / reception circuit 16 and the first switching circuit 24. And is input to the second (buffer) memory circuit 27.
- the signal temporarily stored in the second memory circuit 27 is converted into a signal for driving the contact by the contact drive circuit 28, and then the output contact (DO) circuit 18 (18-1 to 18-n, n is output) Drive).
- DO output contact
- devices such as substation breakers are controlled.
- the transmission / reception circuit 17 that performs electrical / optical conversion connected to the station bus SB is connected to the B terminal of the first switching circuit 24 via the B terminal of the second switching circuit 29. Further, the A terminal of the second switching circuit 29 is connected to the format conversion / restoration circuit 30.
- FIG. 4 is a block diagram showing connection-related portions of the merging unit 10 and the IED 20.
- the portion of the IED 20 associated with the merging unit 10 of FIG. 3 will be described.
- the transmission / reception circuit 41 connected to the process bus PB inside the IED 20 converts the optical signal from the process bus PB into an electric signal, and then the processing unit 43 processes the data. Similarly, the optical signal of the station bus SB is converted into an electric signal by the transmission / reception circuit 42 connected to the station bus SB.
- the output signal of the transmission / reception circuit 41 is monitored by the transmission abnormality detection circuit 44. At the same time, if no abnormality is detected by the transmission abnormality detection circuit 44, the output of the output signal of the transmission / reception circuit 41 is transmitted from the A terminal of the third switching circuit 45 to the trip determination or station bus control processing unit 47, and IED The arithmetic processing in is executed.
- the signal of the station bus SB is transmitted from the A terminal to the trip determination or the station bus control processing unit 47 via the A terminal of the fourth switching circuit 48, and IED The arithmetic processing in is executed.
- the third switching circuit 45 and the fourth switching circuit 48 are both The A terminal is valid and the B terminal is invalid.
- the transmission abnormality detection circuit 44 detects an abnormality in the received signal obtained from the process bus PB (process bus abnormality state)
- the third switching circuit 45 and the fourth switching circuit 48 are In both cases, the A terminal becomes invalid and the B terminal becomes valid.
- the transmission abnormality can be detected almost simultaneously at the merging unit 10 and the IED 20, that is, both ends of the process bus PB.
- the merging unit 10 when there is an abnormality only in reception by the transmission / reception circuit 41 in the IED 20, the merging unit 10 cannot detect a transmission abnormality, but the transmission abnormality detection circuit 44 in the IED 20 detects the abnormality, and an abnormality detection signal is sent to the merging unit 10. By transmitting, the merging unit 10 can also detect an abnormality.
- the abnormality can be detected by the transmission abnormality detection circuit 25 in the merging unit 10, so that the abnormality detection signal is also transmitted to the IED 20 via the process bus PB. Can be detected.
- the current voltage data of the system is transmitted to the IED 20 via the process bus PB, and the control signal from the IED 20 is passed through the restoration circuit 26 and the second memory circuit 27 in the merging unit 10 via the process bus PB.
- the contact driving circuit 28 drives the output contacts 18-1 to 18-n.
- the station bus control circuit 31 is connected to the station bus SB via the A terminal of the second switching circuit 29 and the transmission / reception circuit 17.
- the station bus control circuit 31 transmits the information of the merging unit to the IED 20 and the substation automation system device 46 in FIG. 1, and executes certain processing in response to a request signal from these.
- both the first switching circuit 24 and the second switching circuit 29 are switched from the connection via the A terminal to the connection via the B terminal.
- the current voltage data of the system is transmitted to the IED 20 via the station bus SB, and the control signal from the IED 20 is passed through the restoration circuit 26 and the second memory circuit 27 in the merging unit via the station bus SB. Is transmitted to the contact drive circuit 28, and the contact drive circuit 28 drives the output contacts 18-1 to 18-n.
- the control using the original station bus SB is disconnected, and the control signal based on the result of the transmission of the current / voltage data of the system that has been performed through the process bus and the protection operation in the IED 20 using the system current / data.
- the modification related to the protection calculation in the IED 20 is also performed via the station bus SB. May be.
- the operation of the IED 20 is as follows. Referring again to FIG. 4, when the reception signal from the process bus PB is monitored by the transmission abnormality detection circuit 44 and no abnormality is detected, both the third switching circuit 45 and the fourth switching circuit 48 are connected to the A terminal. The connection via is valid.
- the current / voltage data of the system transmitted from the merging unit 10 via the process bus PB passes through the third switching circuit 45 and is processed by the trip determination in the calculation unit 43 of the IED 20 or by the station bus control processing unit 47. Is done. Further, a station bus signal from the merging unit 10 or the substation automation system device 46 via the station bus SB is processed by the trip determination in the calculation unit 43 or the station bus control processing unit 47 via the third switching circuit 45.
- the transmission abnormality detection circuit 44 When the transmission abnormality detection circuit 44 detects a transmission abnormality of the process bus PB, the transmission abnormality detection circuit 44 switches both the third switching circuit 45 and the fourth switching circuit 48 to the connection via the B terminal. That is, the current / voltage data of the system transmitted from the merging unit 10 via the station bus SB is processed by the trip judgment in the calculation unit 43 or the station bus control processing unit 47 via the third switching circuit 45.
- the station bus control circuit 31 of FIG. 3 of the merging unit 10 is already disconnected from the station bus SB. Therefore, the information from the station bus control circuit 31 does not reach the IED 20 or the substation automation system device 46. Further, the voltage / current information data from the merging unit 10 does not reach the substation automation system device 46 because the transmission destination is designated by the IED 20.
- the substation automation system device 46 Before the switching of the switching circuits 29 and 48, the substation automation system device 46 can transmit and receive signals to and from the merging unit 10 and the IED 20. Therefore, if the merging unit 10 or the IED 20 notifies the substation automation system device 46 of the abnormal state of the process bus PB and then switches the switching circuits 29 and 48, the substation automation system device 46 is connected to the process bus PB. Can recognize abnormal states. Therefore, the substation automation system apparatus 46 restricts the control from the substation automation system apparatus 46 using the station bus SB while the transmission is abnormal.
- the control signal is switched to the station bus SB, and priority is given to the control signal resulting from the transmission of the current-voltage data of the above system and the protection calculation in the IED 20 using it.
- a system that stops (separates) the monitoring control on the original station bus is adopted.
- the transmission speed of the station bus SB has a margin enough to cope with data transmission of the station bus signal in addition to the data transmission by the communication of the original process bus PB, it is not particularly necessary to disconnect.
- only a certain monitoring control may be allowed depending on the priority in the original monitoring control of the station bus.
- a station bus abnormality detection function may be added to the system that switches the original process bus communication to the station bus when the process bus is abnormal as described above.
- the reliability of switching can be improved by adding a condition that the station bus is normal to the switching condition.
- a station bus function stop period can be shortened by adding a circuit (not shown) such as a function for automatically returning to the original state.
- the first embodiment is a process bus protection control system for receiving an analog signal obtained by measuring the state of a power system, converting the analog signal into a digital signal, and controlling a circuit breaker provided in the power system.
- a merging unit 10 that outputs a trip signal of the above
- an IED 20 that is a computing device that determines the state of the trip signal based on a digital signal converted by the merging unit 10, and a substation automation system that performs at least one of monitoring and commanding 46, a process bus PB connecting the merging unit 10 and the IED 20, and a station bus SB connecting the merging unit 10, the IED 20 and the substation automation system apparatus 46.
- the process bus PB and the station bus SB are independent communication transmission paths.
- the IED 20 is configured to transmit a trip command for outputting a trip signal to the merging unit 10 by both the process bus PB and the station bus SB.
- the merging unit 10 includes a first transmission / reception circuit 16 configured to receive a trip command from the IED 20 using the process bus PB, and a trip command using the station bus SB.
- the second transmission / reception circuit 17 receives the trip command from the reception by the first transmission / reception circuit 16 in response to the occurrence of an abnormality in the process bus PB.
- a data processing unit 15 that performs processing based on a trip command.
- the second transmission / reception circuit 17 is configured to be able to receive control data from the substation automation system apparatus 46 using the station bus SB.
- the data processing unit 15 receives control data from the substation automation system device 46 using the station bus SB. Stop receiving.
- At least one of the merging unit 10 and the IED 20 includes transmission abnormality detection circuits 25 and 44 for detecting an abnormality in the process bus PB.
- the transmission abnormality detection circuits 25 and 44 use the station bus SB to inform the substation automation system device 46 that an abnormality has occurred in the process bus PB, and then send the station bus SB to the data processing unit 15 (or the calculation unit 43). The reception of control data from the substation automation system apparatus 46 using is stopped.
- the first transmission / reception circuit 16 is configured to be able to transmit a digital signal to the IED 20 using the process bus PB.
- the second transmission / reception circuit 17 is configured to be able to transmit a digital signal to the IED 20 using the station bus SB.
- the data processing unit 15 switches the transmission of the digital signal from the transmission by the first transmission / reception circuit 16 to the transmission by the second transmission / reception circuit 17 in response to an abnormality occurring in the process bus PB.
- the merging unit according to the first embodiment has a function of switching to a station bus when an abnormality occurs in process bus transmission. Therefore, there is an advantage that protection that is an important function for system protection and a control function for a circuit breaker based on the calculation result can be continued even if the process bus is abnormal, without duplicating the process bus itself.
- the second embodiment includes means for transmitting the calculation result of the IED 20 to the merging unit via the process bus and to the merging unit via the station bus even during normal times. Then, without duplicating the process bus itself for the control signal, the process bus and the station bus are used, each control signal is received by the merging unit, each different output contact is driven, and a logical sum or logic is generated by the contact circuit. Improve reliability by taking the product.
- FIG. 5 is a block diagram showing a configuration of the merging unit 10A used in the second embodiment.
- a merging unit 10 ⁇ / b> A is used instead of the merging unit 10.
- the merging unit 10A of FIG. 5 does not include the transmission or more detection circuit 25, includes a data processing unit 15A instead of the data processing unit 15, and further includes output contact (DO) circuits 19-1 to 19-n.
- DOE output contact
- the same symbols as those in FIG. 3 indicate the same elements, and therefore, the description of the overlapping portions will not be repeated.
- the data processing unit 15A does not include a configuration for switching data paths such as the switching circuits 24 and 29.
- the IED 20 in FIG. 2 transmits a control signal to the merging unit 10A via the process bus PB when the result calculated based on the voltage / current information received via the process bus PB satisfies a predetermined condition.
- the signal is received by the transmission / reception circuit 16
- the control signal is recognized by the restoration circuit 26, and transmitted to the contact driving circuit 28 via the second memory circuit 27.
- the contact driving circuit 28 drives a predetermined output contact (DO) circuit 18 (predetermined output contact among 18-1 to 18-n).
- DO predetermined output contact
- the IED 20 in FIG. 2 transmits the control signal to the station bus SB.
- the control signal from the IED 20 recognizes the control for driving the output contact by the station bus control circuit 31 through the transmission / reception circuit 17 and the format conversion / restoration circuit 30.
- the station bus control circuit 31 causes the contact driving circuit 32 to drive a predetermined output contact (DO) circuit 19 (predetermined output contact among 19-1 to 19-n).
- DO predetermined output contact
- control signal of the IED 20 drives a separate output contact via the process bus and at the same time via the station bus. That is, the control signal from the IED 20 drives independent output contacts via different routes.
- this contact operation can be configured in accordance with the concept of system reliability.
- FIG. 6 is a circuit diagram showing a configuration example when the contacts are connected in series.
- contacts 18-1 and 19-1 are further connected in series to trip coil TC and separating contact 20-1 connected in series.
- FIG. 6 shows an example in which the logical product of the contact signal outputs DO1-1 and DO2-1 is taken outside the merging unit, but other corresponding contact signal outputs DO1-m and DO2-m (where m is 1 to n).
- the logical product can be realized by a circuit connected in series.
- FIG. 7 is a circuit diagram showing a configuration example when the contacts are connected in parallel.
- contacts 18-1, 19-1 connected in parallel are further connected in series with trip coil TC and pull-off contact 20-1 connected in series.
- FIG. 7 shows an example in which the logical sum of the contact signal outputs DO1-1 and DO2-1 is taken outside the merging unit, but other corresponding contact signal outputs DO1-m and DO2-m (m is 1 to n). Similarly, a logical sum can be realized by a circuit connected in parallel.
- the second embodiment is a process bus-compatible protection control system that receives an analog signal obtained by measuring the state of the power system, converts the analog signal into a digital signal, and controls a circuit breaker provided in the power system.
- a merging unit 10A that outputs a trip signal
- an IED 20 that determines the state of the trip signal based on a digital signal converted by the merging unit 10A
- a substation automation system that performs at least one of monitoring and commanding 46
- a process bus PB connecting the merging unit 10A and the IED 20 and a station bus SB connecting the merging unit 10A, the IED 20 and the substation automation system device 46.
- the process bus PB and the station bus SB are independent communication transmission paths.
- the IED 20 is configured to be able to transmit a trip command for outputting a trip signal to the merging unit 10A by both the process bus PB and the station bus SB.
- the merging unit 10A includes a first transmission / reception circuit 16 configured to be able to receive a trip command from the IED 20 using the process bus PB, and a trip command using the station bus SB.
- Is generated from the second transmission / reception circuit 17 configured to be able to receive the signal from the IED 20 and the trip command received via the first transmission / reception circuit 16 to generate a first contact driving signal.
- a data processing unit 15 ⁇ / b> A that generates a second contact driving signal based on a trip command received via the second transmission / reception circuit 17 along with the generation of the signal.
- a combination of the first contact driving signals DO1-1 to DO1-n and the second contact driving signals DO2-1 to DO2-n by configuring an AND / OR circuit as shown in FIG. 6 or 7 outside. The circuit breaker 6 is controlled based on the above.
- the contact output by the contact control signal from the process bus and the contact output by the contact control signal from the station bus are configured outside the merging unit according to the request system.
- both signals via the process bus and the station bus are configured by internal logic by setting AND and OR.
- FIG. 8 is a block diagram showing a configuration of the merging unit 10B used in the third embodiment.
- a merging unit 10 ⁇ / b> B is used instead of the merging unit 10.
- the merging unit 10B of FIG. 8 differs from the merging unit 10 of FIG. 3 in that the merging unit 10B of FIG. 8 does not include the transmission or detection circuit 25 and includes a data processing unit 15B instead of the data processing unit 15.
- the same symbols as those in FIG. 3 indicate the same elements, and therefore, the description of the overlapping portions will not be repeated.
- Embodiment 3 will be described with reference to FIG. Similar to the second embodiment, the contact control signal from the IED 20 is transmitted to the merging unit 10B through two routes via the process bus PB and the station bus SB, individually processed, and input to the DO control circuit 33.
- the DO control circuit 33 performs AND or OR control on the signal via the process bus and the signal via the station bus.
- the contact drive circuit 28 drives predetermined contact circuits of the DO circuits 18-1 to 18-n.
- FIG. 9 is a diagram showing the configuration of the DO control circuit 33 of FIG.
- DO control circuit 33 has a control signal transmitted from memory 27 via process bus PB and a control signal transmitted from station bus control circuit 31 via station bus SB.
- Each of the AND (or OR) circuits 34-1 to 34-n is configured to be able to change whether to perform AND processing or OR processing in accordance with the DO setting signal in the merging unit.
- Each calculation result is transmitted to the contact drive circuit 28 of FIG.
- the contact driving circuit drives a predetermined output contact based on the calculation result.
- the third embodiment is a process bus-corresponding protection control system for receiving an analog signal obtained by measuring the state of the power system, converting the analog signal into a digital signal, and controlling a circuit breaker provided in the power system.
- a merging unit 10B that outputs a trip signal an IED 20 that is a computing device that determines the state of the trip signal based on a digital signal converted by the merging unit 10B, and a substation automation system that performs at least one of monitoring and commanding 46, a process bus PB connecting the merging unit 10B and the IED 20, and a station bus SB connecting the merging unit 10B, the IED 20 and the substation automation system apparatus 46.
- the process bus PB and the station bus SB are independent communication transmission paths.
- the IED 20 is configured to transmit a trip command for outputting a trip signal to the merging unit 10B by both the process bus PB and the station bus SB.
- the merging unit 10B includes a first transmission / reception circuit 16 configured to receive a trip command from the IED 20 using the process bus PB, and a trip command using the station bus SB. Is received from the IED 20, the first reception result of the trip command received via the first transmission / reception circuit 16, and the reception via the second transmission / reception circuit 17. And a data processing unit 15B that generates a contact driving signal used for controlling the circuit breaker 6 based on the second reception result of the trip command. If the merging unit is configured in this way, there is no need for serial or parallel connection outside the merging unit, which is necessary in the second embodiment, and the number of output contact circuits can be reduced.
- FIG. 10 is a diagram showing a configuration of a modification of FIG.
- the same contact control signal from the IED 20 is transmitted to the station bus as well as the process bus.
- a plurality of IEDs 20-A and 20-B are connected to the process bus PB and the station bus SB as shown in FIG.
- the contact control signal from one IED 20-A is transmitted via the process bus PB
- the contact control signal from the other IED 20-B is transmitted via the station bus SB.
- the merging unit and the IED are provided with a circuit that detects an abnormality in the process bus signal between the merging unit and the IED.
- the process bus communication path is switched to the station bus communication path. That is, when the process bus communication is abnormal, the station bus has a process bus function.
- the control signal of the substation equipment is output from the merging unit, and the switching control of the circuit breaker installed in the power system is performed.
- the control signal output from the merging unit is generated based on current and voltage information transmitted from the merging unit to the IED via the process bus.
- a control signal is transmitted from the IED to the merging unit via the process bus.
- the merging unit drives an internal output contact.
- the IED sends a similar control signal via the station bus to the merging unit to drive other different output contacts.
- These output contacts are configured to be connected in series or in parallel to control equipment installed in the power system such as a circuit breaker.
- the logical sum or logical product is calculated by the internal logic using two control signals, that is, the control signal transmitted from the IED to the merging unit via the process bus and the control signal transmitted via the station bus. take.
- the reliability of the control is similarly increased without duplicating the contact circuit.
- the control signal of the main IED is controlled from the failsafe IED via the process bus.
- Each signal may be transmitted to the merging unit via a station bus (or vice versa). Then, even if the configuration of the second embodiment in which different output contacts are driven by the merging unit or the configuration of the third embodiment in which the control signal is synthesized by the internal logic is applied, the reliability of the control is similarly increased. be able to.
- 1 protection control system 2 power transmission line, 3 transformer, 4 supply line, 5 bus, 6 breaker, 7 current transformer, 8 instrument transformer, 10, 10A, 10B merging unit, 11 input conversion circuit, 12 Analog filter circuit, 13 multiplexer circuit, 14 conversion circuit, 15, 15A, 15B data processing unit, 16, 17, 41, 42 transmission / reception circuit, 18-1 to 18-n, 19-1 to 19-n output contact circuit, 20 IED, 21 analog data processing unit, 22, 27 memory circuit, 23 format conversion circuit, 24, 29, 45, 48 switching circuit, 25, 44 transmission abnormality detection circuit, 26, 30 restoration circuit, 27 memory, 28, 32 Contact drive circuit, 30 format conversion / restoration circuit, 31 station bus control circuit, 33 DO control circuit, 43 computing unit, an automated system 46 substations, 47 station bus control processing unit, 50 remote monitor control device 51 distant control stations, PB process bus, SB station bus, TC trip coil.
Abstract
Description
[共通の全体システム構成]
図1は、保護制御システムの全体構成を示す模式図である。
実施の形態1では、プロセスバス伝送に異常が発生した場合に、ステーションバスを経由した伝送に切り替えるように構成した。これに対し、実施の形態2では、IED20の演算結果を通常時もプロセスバス経由でマージングユニットに伝送する手段とステーションバス経由でマージングユニットに伝送する手段を備える。そして、制御信号についてプロセスバス自体を2重化することなく、プロセスバスとステーションバスを使い、マージングユニットで夫々の制御信号を受信し、夫々異なる出力接点を駆動させ、接点回路で論理和または論理積を採る事で信頼性を向上させる。
実施の形態2では、プロセスバスからの接点制御信号による接点出力とステーションバスからの接点制御信号による接点出力をマージングユニット外部で要求システムに応じて構成するようにした。これに対し、実施の形態3では、プロセスバス経由とステーションバス経由での両信号をAND、ORの設定により内部ロジックで構成する。
このようにマージングユニットを構成すれば、実施の形態2では必要であったマージングユニット外部での直列または並列接続の必要がなく、また、出力接点回路数も減らすことができる。
図10は、図2の変形例の構成を示した図である。
Claims (9)
- 電力系統の状態を計測したアナログ信号を受けてデジタル信号に変換するとともに前記電力系統に設けられた遮断器を制御するためのトリップ信号を出力するマージングユニットと、
前記マージングユニットによって変換されたデジタル信号に基づいて前記トリップ信号の状態を決定する演算装置と、
監視および指令の少なくとも一方を行なう変電所自動化システム装置と、
前記マージングユニットと前記演算装置とを結ぶプロセスバスと、
前記マージングユニットと前記演算装置と前記変電所自動化システム装置とを結ぶステーションバスとを備え、
前記プロセスバスと前記ステーションバスは、互いに独立した通信伝送路であり、
前記演算装置は、前記プロセスバスおよび前記ステーションバスの両方によって、前記マージングユニットに対して、前記トリップ信号を出力させるためのトリップ指令を送信可能に構成される、プロセスバス対応保護制御システム。 - 前記マージングユニットは、
前記プロセスバスを用いて前記トリップ指令を前記演算装置から受信することが可能に構成された第1送受信部と、
前記ステーションバスを用いて前記トリップ指令を前記演算装置から受信することが可能に構成された第2送受信部と、
前記プロセスバスに異常が生じたことに応じて、前記トリップ指令の受信を前記第1送受信部による受信から前記第2送受信部による受信に切り替えて、前記トリップ指令に基づく処理を行なうデータ処理部とを含む、請求項1に記載のプロセスバス対応保護制御システム。 - 前記第2送受信部は、前記ステーションバスを用いて前記変電所自動化システム装置から制御データを受信することが可能に構成され、
前記データ処理部は、前記トリップ指令の受信を前記第1送受信部による受信から前記第2送受信部による受信に切り替えた場合には、前記ステーションバスを用いた前記変電所自動化システム装置からの前記制御データの受信を中止する、請求項2に記載のプロセスバス対応保護制御システム。 - 前記マージングユニットおよび前記演算装置の少なくとも一方は、
前記プロセスバスの異常を検出する異常検出部を含み、
前記異常検出部は、前記プロセスバスに異常が生じたことを前記ステーションバスを用いて前記変電所自動化システム装置に連絡した後に、前記データ処理部に前記ステーションバスを用いた前記変電所自動化システム装置からの前記制御データの受信を中止させる、請求項3に記載のプロセスバス対応保護制御システム。 - 前記第1送受信部は、前記プロセスバスを用いて前記デジタル信号を前記演算装置に送信可能に構成され、
前記第2送受信部は、前記ステーションバスを用いて前記デジタル信号を前記演算装置に送信可能に構成され、
前記データ処理部は、前記プロセスバスに異常が生じたことに応じて、前記デジタル信号の送信を前記第1送受信部による送信から前記第2送受信部による送信に切り替える、請求項2に記載のプロセスバス対応保護制御システム。 - 前記マージングユニットは、
前記プロセスバスを用いて前記トリップ指令を前記演算装置から受信することが可能に構成された第1送受信部と、
前記ステーションバスを用いて前記トリップ指令を前記演算装置から受信することが可能に構成された第2送受信部と、
前記第1送受信部を経由して受信した前記トリップ指令に基づいて第1の接点駆動信号を生成し、前記第1の接点駆動信号の生成とともに、前記第2送受信部を経由して受信した前記トリップ指令に基づいて第2の接点駆動信号を生成するデータ処理部とを含み、
前記第1および第2の接点駆動信号の組み合わせに基づいて前記遮断器が制御される、、請求項1に記載のプロセスバス対応保護制御システム。 - 前記マージングユニットは、
前記プロセスバスを用いて前記トリップ指令を前記演算装置から受信することが可能に構成された第1送受信部と、
前記ステーションバスを用いて前記トリップ指令を前記演算装置から受信することが可能に構成された第2送受信部と、
前記第1送受信部を経由して受信した前記トリップ指令の第1の受信結果と、前記第2送受信部を経由して受信した前記トリップ指令の第2の受信結果とに基づいて、前記遮断器の制御に用いる接点駆動信号を生成するデータ処理部とを含む、請求項1に記載のプロセスバス対応保護制御システム。 - プロセスバス対応保護制御システムを構成し、電力系統の状態を計測したアナログ信号を受けてデジタル信号に変換するとともに前記電力系統に設けられた遮断器を制御するためのトリップ信号を出力するマージングユニットであって、
前記プロセスバス対応保護制御システムは、前記マージングユニットによって変換されたデジタル信号に基づいて前記トリップ信号の状態を決定する演算装置と、監視および指令の少なくとも一方を行なう変電所自動化システム装置と、前記マージングユニットと前記演算装置とを結ぶプロセスバスと、前記マージングユニットと前記演算装置と前記変電所自動化システム装置とを結ぶステーションバスとを含み、
前記プロセスバスと前記ステーションバスは、互いに独立した通信伝送路であり、
前記マージングユニットは、
前記プロセスバスを用いて、前記トリップ信号を出力させるためのトリップ指令を前記演算装置から受信することが可能に構成された第1送受信部と、
前記ステーションバスを用いて、前記トリップ指令を前記演算装置から受信することが可能に構成された第2送受信部と、
前記第1送受信部および前記第2送受信部の少なくとも一方から前記トリップ指令を受信し、前記遮断器の遮断に関する制御を行なうデータ処理部とを含む、マージングユニット。 - プロセスバス対応保護制御システムを構成する演算装置であって、
前記プロセスバス対応保護制御システムは、電力系統の状態を計測したアナログ信号を受けてデジタル信号に変換するとともに前記電力系統に設けられた遮断器を制御するためのトリップ信号を出力するマージングユニットと、監視および指令の少なくとも一方を行なう変電所自動化システム装置と、前記マージングユニットと前記演算装置とを結ぶプロセスバスと、前記マージングユニットと前記演算装置と前記変電所自動化システム装置とを結ぶステーションバスとを含み、
前記プロセスバスと前記ステーションバスは、互いに独立した通信伝送路であり、
前記演算装置は、
前記プロセスバスを用いて、前記トリップ信号を出力させるためのトリップ指令を前記マージングユニットに送信することが可能に構成された第1送受信部と、
前記ステーションバスを用いて、前記トリップ指令を前記マージングユニットに送信することが可能に構成された第2送受信部と、
前記マージングユニットによって変換されたデジタル信号に基づいて前記トリップ指令を発生し、前記第1送受信部および前記第2送受信部の少なくともいずれか一方によって前記トリップ指令を前記マージングユニットに送信させる演算部とを備える、演算装置。
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