CN111987801B - Transformer substation switch control system and transformer substation switch control method - Google Patents

Transformer substation switch control system and transformer substation switch control method Download PDF

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Publication number
CN111987801B
CN111987801B CN202010848892.6A CN202010848892A CN111987801B CN 111987801 B CN111987801 B CN 111987801B CN 202010848892 A CN202010848892 A CN 202010848892A CN 111987801 B CN111987801 B CN 111987801B
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China
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switch
information
communication terminal
fault
module
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CN111987801A (en
Inventor
罗滨
成新苗
黄斌
王玉姬
郑淑仪
郑继南
李俊松
潘靖
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Guangdong Power Grid Co Ltd
Shantou Power Supply Bureau of Guangdong Power Grid Co Ltd
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Guangdong Power Grid Co Ltd
Shantou Power Supply Bureau of Guangdong Power Grid Co Ltd
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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
    • H02J13/00022—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 wireless data transmission
    • H02J13/00026—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 wireless data transmission involving a local wireless network, e.g. Wi-Fi, ZigBee or Bluetooth
    • 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
    • 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
    • H02J13/00017—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 using optical fiber
    • 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
    • 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
    • H02J2213/00—Indexing scheme relating to details of circuit arrangements for providing remote indication of network conditions of for circuit arrangements for providing remote control of switching means in a power distribution network
    • H02J2213/10—Indexing scheme relating to details of circuit arrangements for providing remote indication of network conditions of for circuit arrangements for providing remote control of switching means in a power distribution network using simultaneously two or more different transmission means
    • 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
    • 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
    • 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
    • Y04S40/126—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 wireless data transmission

Abstract

The embodiment of the invention discloses a transformer substation switch control system and a transformer substation switch control method, which comprise the following steps: the system comprises a transformer substation outgoing switch, a protection measurement and control device connected with the outgoing switch, a first communication terminal connected with the protection measurement and control device, and a second communication terminal respectively connected with the first communication terminal and a distributed terminal at the side of a first switch; the distributed terminal collects fault information and action information of the first switch and sends the fault information and the action information to the protection measurement and control device through the first communication terminal and the second communication terminal; and the protection measurement and control device determines whether to generate a closing instruction according to the fault information and the action information to control the reclosing of the outgoing line switch. The distributed terminal does not need to be installed on the outgoing switch side, the secondary circuit does not need to be installed, the current and voltage are collected, the debugging is simple, the circuit is simplified, the error probability is reduced, the communication data volume is small, the requirements on the communication speed and the quality are not high, moreover, whether the outgoing switch is switched on or not is still realized by the protection measurement and control device on the outgoing switch side, the responsibility determination is accurate, and the management interface is clear.

Description

Transformer substation switch control system and transformer substation switch control method
Technical Field
The embodiment of the invention relates to the technical field of power distribution, in particular to a transformer substation switch control system and a transformer substation switch control method.
Background
Feeder Automation (FA) is to monitor the operation condition of a distribution line by using an Automation device or system, find a line fault in time, diagnose a fault section quickly, isolate the fault section, and recover power supply to a non-fault section. Currently, intelligent distributed feeder automation is divided into fast and slow distributed feeder automation.
In slow-moving type intelligent distributed automation, a 10kV outgoing switch of a transformer substation belongs to a transformer substation system and does not have a distributed feeder automation function, a distributed terminal needs to be added to the outgoing switch of the transformer substation, so that the distributed terminal on the outgoing switch side communicates with the distributed terminal on the whole line, the outgoing switch is directly controlled by the distributed terminal on the outgoing switch side, or a control instruction is forwarded to control the outgoing switch by a protection and control device of the outgoing switch of the transformer substation, however, the following problems still exist:
(1) the distributed terminals need to acquire the voltage and current of the outgoing switch of the transformer substation and the information of the adjacent distributed terminals in real time, make corresponding judgment and send instructions to the outgoing switch, and send related information to the adjacent switches through a communication network, so that field installation and debugging of the distributed terminals in the transformer substation are difficult.
(2) The voltage and current acquisition devices are connected to the 10kV outgoing switch side of the transformer substation, the secondary circuit of the 10kV outgoing switch needs to be changed, the load of the secondary circuit is increased, and the probability of errors is increased by field modification of the secondary circuit.
(3) The distributed terminal on the 10kV outgoing switch side of the transformer substation needs to be in high-speed communication with other distributed terminals on a line, the data interaction amount is large, and the requirements on the communication speed and quality are high.
(4) The original protection and monitoring device of the 10kV outgoing switch of the transformer substation belongs to a part of a comprehensive automation system of the transformer substation, after a distributed terminal is added, the protection and monitoring device receives an operation instruction from the distributed terminal, the judgment of the protection and monitoring device is possibly different, the responsibility confirmation of the outgoing switch action instruction and the responsibility interface have problems, the outgoing switch can be controlled by the distributed terminal and the contained monitoring and monitoring device, and the management interface is fuzzy.
Disclosure of Invention
The embodiment of the invention provides a substation switch control system and a substation switch control method, which aim to solve the problems existing in the closing control mode of a substation side outlet switch in the prior art.
In a first aspect, an embodiment of the present invention provides a substation switch control system, including: the system comprises a transformer substation outgoing switch, a protection measurement and control device connected with the outgoing switch, a first communication terminal connected with the protection measurement and control device, and a second communication terminal respectively connected with the first communication terminal and a distributed terminal at the side of a first switch;
the distributed terminal is used for collecting fault information and action information of the first switch and sending the fault information and the action information to the second communication terminal; the second communication terminal is used for sending the fault information and the action information to the first communication terminal;
the first communication terminal is used for receiving fault information and action information sent by the second communication terminal and forwarding the fault information and the action information to the protection measurement and control device;
the protection measurement and control device is used for receiving fault information and action information forwarded by the first communication terminal and determining whether a closing instruction is generated or not according to the fault information and the action information to control reclosing of the outgoing line switch;
the protection measurement and control device comprises a receiving module and a control instruction generating module;
the receiving module is used for receiving fault information and switching action information from the first communication terminal;
the control instruction generating module is used for generating a closing control instruction to control the closing of the outgoing line switch when the receiving module receives the first fault information and the first switch action information, and generating a non-closing control instruction when the receiving module receives the second fault information and the second switch action information.
Optionally, the distributed terminal includes a fault detection module, an information generation module, and an information sending module;
the fault detection module is used for detecting the current flowing through the primary switch;
the information generating module is used for determining that a fault occurs behind the primary switch when the current is a fault current, generating first fault information and first switch action information, and determining that the fault occurs between the outgoing line switch and the primary switch when the fault detecting module does not detect the fault current, and generating second fault information and second switch action information;
the information sending module is used for sending the first fault information and the first switch action information to the second communication terminal, or sending the second fault information and the second switch action information to the second communication terminal.
Optionally, the protection measurement and control device includes a receiving module and a control instruction generating module;
the receiving module is used for receiving fault information and switching action information from the first communication terminal;
the control instruction generating module is used for generating a closing control instruction to control the closing of the outgoing line switch when the receiving module receives the first fault information and the first switch action information, and generating a non-closing control instruction when the receiving module receives the second fault information and the second switch action information.
Optionally, the protection measurement and control device further comprises an outgoing switch monitoring module and a sending module;
the outgoing switch monitoring module is used for collecting the protection monitoring information of the outgoing switch and outputting the protection monitoring information to the sending module;
the sending module is used for sending the protection monitoring information to the first communication terminal, and the first communication terminal receives the protection monitoring information and forwards the protection monitoring information to the distributed terminal through the second communication terminal;
and the distributed terminal is also used for judging the line fault condition according to the protection monitoring information.
Optionally, the first communication terminal and the second communication terminal each include:
a processor;
the output end of the power supply circuit is connected with the processor to supply power to the processor;
a wired network interface connected to the processor;
a wireless module connected to the processor;
the RS232 serial port and/or the RJ45 network port are/is connected with the processor;
a USB interface and a storage medium connected with the processor;
the wired network interface is a cable Ethernet interface or an optical fiber Ethernet interface; the wireless module can be at least one of a Bluetooth module, a WiFi module and a LoRa module. Optionally, an input end of a power circuit of the first communication terminal is connected to a power supply of the protection measurement and control device, an input end of a power circuit of the second communication terminal is connected to a power supply of a distributed terminal on the first switch side, the first communication terminal is connected to the protection measurement and control device through the RS232 serial port and/or the RJ45 network port, the second communication terminal is connected to the distributed terminal on the first switch side through the RS232 serial port and/or the RJ45 network port, and the first communication terminal and the second communication terminal are connected through a wired network interface or a wireless module;
the first communication terminal and the second communication terminal are further used for storing the fault information and the switch action information to the storage medium and sending the fault information and the switch action information to the mobile terminal through the wireless module so as to display the fault information and the switch action information on the mobile terminal.
Optionally, the protection measurement and control device is further connected with a comprehensive automation system of the transformer substation;
the protection measurement and control device is also used for receiving a control instruction of the comprehensive automation system and controlling the tripping or closing of the outgoing switch according to the control instruction.
In a second aspect, an embodiment of the present invention provides a transformer substation switch control method, which is applied to a transformer substation switch control system, where the transformer substation switch control system includes: the transformer substation switching method comprises the following steps of:
receiving fault information and action information forwarded by the first communication terminal, wherein the fault information and the action information are collected by the distributed terminal and then forwarded to the first communication terminal through the second communication terminal;
and determining whether a closing instruction is generated or not according to the fault information and the action information to control reclosing of the outgoing line switch.
Optionally, the distributed terminal generates the failure information and the action information by:
the distributed terminal detects the current flowing through the primary switch;
determining that a fault occurs after the first switch when the current is a fault current, and generating first fault information and first switching action information;
and when the fault detection module does not detect fault current, determining that a fault occurs between the outgoing switch and the first switch and generating second fault information and second switch action information.
Optionally, the determining whether to generate a closing instruction to control reclosing of the outgoing line switch according to the fault information and the action information includes:
generating a closing control instruction to control the closing of the outgoing line switch when the first fault information and the first switch action information are received;
and generating a non-switching control instruction when the receiving module receives the second fault information and the second switch action information.
Optionally, the method further comprises:
collecting the protection monitoring information of the outgoing line switch;
and sending the protection monitoring information to the first communication terminal, wherein the first communication terminal is used for receiving the protection monitoring information and then forwarding the protection monitoring information to the distributed terminal through the second communication terminal, and the distributed terminal is used for judging the line fault condition according to the protection monitoring information.
Optionally, the method further comprises:
receiving a control instruction of the integrated automation system;
and controlling the outgoing switch to trip or close according to the control instruction.
The transformer substation switch control system of the embodiment of the invention comprises: the embodiment of the invention discloses a transformer substation outlet switch, a protection and control device connected with the outlet switch, a first communication terminal connected with the protection and control device, and a second communication terminal respectively connected with the first communication terminal and a distributed terminal at the side of a first switch. The distributed terminal is not required to be installed on the outgoing switch side, on one hand, the communication terminal can be detached for debugging during debugging, the debugging is simple, on the other hand, the first communication terminal on the outgoing switch side is responsible for information forwarding and is in communication with the second terminal, the secondary circuit is not required to be installed on the outgoing switch side for collecting current and voltage, the circuit is simplified, the probability of circuit errors is reduced, the communication data volume is small, requirements on the communication speed and the quality are not high, in addition, the first communication terminal on the outgoing switch side is responsible for information forwarding, whether switching-on is carried out or not is still achieved by the protection measurement and control device on the outgoing switch side, the responsibility determination is accurate, and the management interface is clear.
Drawings
Fig. 1 is a schematic structural diagram of a substation switch control system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a first communication terminal and a second communication terminal in an embodiment of the present invention;
fig. 3 is a diagram illustrating a connection example of a first communication terminal and a second communication terminal with other modules in the embodiment of the present invention;
fig. 4 is a flowchart of a substation switch control method according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic structural diagram of a substation switch control system according to an embodiment of the present invention, where the substation switch control system is configured to execute the substation switch control method according to the embodiment of the present invention to control a switch-on of an outgoing line switch of a substation. As shown in fig. 1, a substation switch control system according to an embodiment of the present invention includes: the system comprises a transformer substation outgoing line switch 10, a protection measurement and control device 20 connected with the outgoing line switch 10, a first communication terminal 30 connected with the protection measurement and control device 20, and a second communication terminal 40 respectively connected with the first communication terminal 30 and a distributed terminal 50 on the first switch 60 side.
In the embodiment of the present invention, the substation may be a 10kV substation, and of course, may also be another specified substation, where the substation may be provided with an outgoing switch 10, the outgoing switch 10 may be a circuit breaker or another load switch, the outgoing switch 10 is connected to a first switch 60 of a distributed feed system through a transmission line, and after the first switch 60 on the transmission line, a plurality of automatic switches may be included, each automatic switch is controlled by a distributed terminal (not shown), and when a fault occurs on the transmission line, the outgoing switch 10 trips, and after the fault on the transmission line is located and isolated, the outgoing switch 10 recloses to recover power supply.
As shown in fig. 1, the first switch 60 is connected to one of the distributed terminals 50, and the distributed terminal 50 can collect the voltage and current of the first switch 60 to determine whether a fault occurs, and communicate with the distributed terminals of the adjacent automatic switches to locate a fault point, so as to control the corresponding automatic switches to act to locate the fault, isolate and restore the power supply. In the embodiment of the present invention, the distributed terminal 50 on the first switch 60 side is configured to collect the failure information and the operation information of the first switch 60, and send the failure information and the operation information to the second communication terminal 40.
In the embodiment of the present invention, the first communication terminal 30 and the second communication terminal 40 may be terminals that implement data exchange, the first communication terminal 30 and the second communication terminal 40 may implement communication through a conventional ethernet, an optical fiber ethernet, wireless, or the like, and the first communication terminal 30 and the second communication terminal 40 may be the same communication terminal or different communication terminals. In the embodiment of the present invention, the second communication terminal 40 is configured to send the fault information and the action information of the first switch 60, which are collected by the distributed terminal 50, to the first communication terminal 30, and the first communication terminal 30 is configured to receive the fault information and the action information sent by the second communication terminal 40 and forward the fault information and the action information to the protection measurement and control device 20.
The protection measurement and control device 20 may be a device for controlling the outgoing line switch 10, and the protection measurement and control device 20 is configured to receive the fault information and the action information forwarded by the first communication terminal, and determine whether to generate a closing instruction according to the fault information and the action information to control reclosing of the outgoing line switch.
In an optional embodiment of the present invention, the distributed terminal 50 includes a fault detection module, an information generation module, and an information transmission module, where the fault detection module may be a current or voltage acquisition module, and the fault detection module is configured to detect a current flowing through a primary switch; the information generation module is used for determining that a fault occurs behind the first switch when the current is the fault current, generating first fault information and first switch action information, and determining that the fault occurs between the outgoing switch and the first switch and generating second fault information and second switch action information when the fault detection module does not detect the fault current; the information sending module is configured to send the first failure information and the first switching action information to the second communication terminal 40, or send the second failure information and the second switching action information to the second communication terminal 40.
For example, as shown in fig. 1, if a fault occurs between any two automatic switches after the first switch 60, the fault current on the transmission line flows through the first switch 60, that is, the distributed terminal 50 may determine that the fault occurs after the first switch 60 when the first switch 60 collects the fault current; if a fault occurs between the outgoing switch 10 and the first switch 60, it indicates that there is an open circuit between the outgoing switch 10 and the first switch 60, and no current flows into the first switch 60, i.e., when the first switch 60 does not collect current, the distributed terminal 50 indicates that a fault occurs between the outgoing switch 10 and the first switch 60. The specific method for detecting the fault current is the same as any fault current detection method in the prior art, and is not detailed or limited herein, and the manner for generating the corresponding fault information and the operation information is not limited.
In another optional embodiment of the present invention, the protection measurement and control device 20 includes a receiving module and a control instruction generating module, wherein the receiving module is configured to receive the fault information and the switching action information from the first communication terminal 30, the control instruction generating module is configured to generate a closing control instruction to control closing of the outgoing line switch when the receiving module receives the first fault information and the first switching action information, and generate a non-closing control instruction when the receiving module receives the second fault information and the second switching action information. Illustratively, as shown in fig. 1, if the first fault information and the first switch action information are received, it is indicated that the fault occurs after the first switch 60, a closing control instruction may be generated to control the outgoing line switch 10 to close to recover the power supply to the area after the isolated fault, and if the second fault information and the second switch action information are received, it is indicated that the fault occurs between the outgoing line switch 10 and the first switch 60, closing is not required before the fault is not cleared, and a non-closing control instruction may be generated to prevent the outgoing line switch 10 from tripping again after closing. The fault information and the action information may be agreed in advance, and the closing control command and the non-closing control command may also be agreed in advance in the same way.
Further, the protection monitoring device 20 further includes an outgoing line switch monitoring module and a sending module, the outgoing line switch monitoring module is configured to collect protection monitoring information of the outgoing line switch 10 and output the protection monitoring information to the sending module, the sending module is configured to send the protection monitoring information to the first communication terminal 30, after receiving the protection monitoring information, the first communication terminal 30 forwards the protection monitoring information to the distributed terminal 50 through the second communication terminal 40, and the distributed terminal 50 is further configured to determine a line fault condition according to the protection monitoring information, so as to control the first switch 60 to perform a corresponding switching action.
As shown in fig. 2, which is a schematic diagram of a first communication terminal and a second communication terminal in an embodiment of the present invention, in the embodiment of the present invention, each of the first communication terminal 30 and the second communication terminal 40 includes: the device comprises a processor, a power supply circuit, a wired network interface, a wireless module, a USB interface, a storage medium, an RS232 serial port and/or an RJ45 network port and the like, wherein the power supply circuit, the wired network interface, the wireless module, the USB interface, the storage medium, the RS232 serial port and/or the RJ45 network port are/is connected with the processor. The processor may be an MCU (micro control Unit), and the MCU may process various received information and forward the information according to a certain communication protocol. The wired network interface may be an ethernet card and/or a fiber-optic ethernet port, preferably, the wired network interface is a fiber-optic ethernet port to increase the data communication rate. The wireless module can be at least one of a Bluetooth module, a WiFi module and a LoRa module, the USB interface can be various existing USB interfaces, and the storage medium can be a pluggable flash memory.
In the embodiment of the present invention, an input end of the power circuit of the first communication terminal 30 may be connected to a power supply of the protection measurement and control device 20, and an input end of the power circuit of the second communication terminal 40 may be connected to a power supply of the distributed terminal 50 on the first switch 60 side, so that the first communication terminal 30 and the second communication terminal 40 obtain a working power supply.
As shown in fig. 3, in the embodiment of the present invention, a first communication terminal is connected to a protection measurement and control device through an RS232 serial port and/or an RJ45 network port, a second communication terminal is connected to a distributed terminal on the first switch side through an RS232 serial port and/or an RJ45 network port, the first communication terminal and the second communication terminal are connected through an optical fiber, specifically, the first communication terminal and the second communication terminal are connected to an optical fiber ethernet switch through an optical fiber ethernet interface, and exchange data through the optical fiber ethernet switch, of course, the first communication terminal and the second communication terminal may also be connected to the protection measurement and control device and the distributed terminal through other serial ports, and the first communication terminal and the second communication terminal may be connected through other wired connection modes or through a wireless connection mode.
As shown in fig. 2, in the embodiment of the present invention, a first communication terminal and a second communication terminal are provided with a storage medium, the first communication terminal and the second communication terminal can store fault information and switch action information in the storage medium, and when the mobile terminal is connected to the first communication terminal or the second communication terminal through a wireless network, the first communication terminal and the second communication terminal can read the fault information, the switch action information, or other information from the storage medium in response to a request from the mobile terminal and send the fault information and the switch action information to the mobile terminal through a wireless module, so as to display the fault information and the switch action information on the mobile terminal, so as to obtain a record of the fault information, the switch action information, or other various information through the mobile terminal, so as to provide a basis for history backtracking analysis.
As shown in fig. 1, in the embodiment of the present invention, the protection measurement and control device 20 is further connected to the integrated automation system 70 of the substation, so that the protection measurement and control device 20 receives a control instruction of the integrated automation system 70 and controls the outgoing switch 10 to trip or close according to the control instruction. In the embodiment of the present invention, the protection measurement and control device 20 is connected to the integrated automation system 70, and as a part of the integrated automation system 70, may execute a related control command of the integrated automation system 70.
According to the embodiment of the invention, the protection measurement and control device of the outgoing line switch is communicated with the distributed terminal of the first switch through the first communication terminal and the second communication terminal, the first communication terminal and the second communication terminal send the fault information and the action information of the side of the first switch to the protection measurement and control device, and the protection measurement and control device determines whether a closing instruction is generated to control the reclosing of the outgoing line switch. The distributed terminal is not required to be installed on the outgoing switch side, on one hand, the communication terminal can be detached for debugging during debugging, the debugging is simple, on the other hand, the first communication terminal on the outgoing switch side is responsible for information forwarding and is in communication with the second terminal, the secondary circuit is not required to be installed on the outgoing switch side for collecting current and voltage, the circuit is simplified, the probability of circuit errors is reduced, the communication data volume is small, requirements on the communication speed and the quality are not high, in addition, the first communication terminal on the outgoing switch side is responsible for information forwarding, whether switching-on is carried out or not is still achieved by the protection measurement and control device on the outgoing switch side, the responsibility determination is accurate, and the management interface is clear.
Fig. 4 is a flowchart of a substation switch control method according to an embodiment of the present invention. The embodiment of the invention is applicable to the condition of controlling the outgoing line switch of the transformer substation, the method can be executed by a transformer substation switch control system, and as shown in fig. 4, the transformer substation switch control method of the embodiment of the invention can comprise the following steps:
s101, receiving fault information and action information forwarded by the first communication terminal, wherein the fault information and the action information are collected by the distributed terminal and then forwarded to the first communication terminal through the second communication terminal.
As shown in fig. 1, the substation switch control system according to the embodiment of the present invention includes a substation outgoing switch, a protection measurement and control device connected to the outgoing switch, a first communication terminal connected to the protection measurement and control device, and a second communication terminal connected to the first communication terminal and a distributed terminal on the first switch side. The distributed terminal collects fault information and action information of the first switch and then sends the fault information and the action information to the second communication terminal, the second communication terminal forwards the fault information and the action information to the first communication terminal, and the first communication terminal forwards the fault information and the action information to the protection measurement and control device.
Specifically, the distributed terminal detects current flowing through a first switch, determines that a fault occurs after the first switch when the current is fault current, and generates first fault information and first switch action information; and when the fault detection module does not detect the fault current, determining that the fault occurs between the outgoing switch and the first switch and generating second fault information and second switch action information.
And S102, determining whether a closing instruction is generated or not according to the fault information and the action information to control reclosing of the outgoing line switch.
Specifically, when the protection measurement and control device receives the first fault information and the first switch action information, it is described that a fault occurs after the first switch, after the first switch and the automatic switch after the first switch isolate a fault region through a switch action, in order to recover power supply to a region outside the fault region, the protection measurement and control device may generate a closing control instruction to control the closing of the outgoing line switch.
The protection measurement and control device generates a non-switching-on control instruction when receiving the second fault information and the second switch action information, namely when receiving the second fault information and the second switch action information, the protection measurement and control device indicates that the fault occurs between the outgoing switch and the first switch, and needs to be switched on after the fault is solved, and needs to generate the non-switching-on control instruction to prevent the outgoing switch from being automatically switched on in order to prevent the outgoing switch from being automatically switched on.
According to the transformer substation switch control system, the first communication terminal and the second communication terminal are used for realizing the communication between the protection measurement and control device of the outgoing switch and the distributed terminal of the first switch, the first communication terminal and the second communication terminal are used for sending fault information and action information of the side of the first switch to the protection measurement and control device, and the protection measurement and control device determines whether a closing instruction is generated to control the reclosing of the outgoing switch. The distributed terminal is not required to be installed on the outgoing switch side, on one hand, the communication terminal can be detached for debugging during debugging, the debugging is simple, on the other hand, the first communication terminal on the outgoing switch side is responsible for information forwarding and is in communication with the second terminal, the secondary circuit is not required to be installed on the outgoing switch side for collecting current and voltage, the circuit is simplified, the probability of circuit errors is reduced, the communication data volume is small, requirements on the communication speed and the quality are not high, in addition, the first communication terminal on the outgoing switch side is responsible for information forwarding, whether switching-on is carried out or not is still achieved by the protection measurement and control device on the outgoing switch side, the responsibility determination is accurate, and the management interface is clear.
In an optional embodiment of the present invention, the protection measurement and control device may further collect protection monitoring information of the line switch, and send the protection monitoring information to the first communication terminal, where the first communication terminal is configured to receive the protection monitoring information and then forward the protection monitoring information to the distributed terminal through the second communication terminal, and the distributed terminal is configured to determine a line fault condition according to the protection monitoring information.
Optionally, the protection measurement and control device is connected with a comprehensive automation system of the transformer substation, and the protection measurement and control device also receives a control instruction of the comprehensive automation system and controls the outgoing switch to trip or close according to the control instruction.
The transformer substation switch control method provided by the embodiment of the invention is applied to the transformer substation switch control system provided by the embodiment of the invention, so that the transformer substation switch control method has corresponding beneficial effects.
It should be noted that, as for the method embodiment, since it is basically similar to the system embodiment, the description is relatively simple, and for the relevant points, reference may be made to partial description of the method embodiment.
It is to be noted that the foregoing description is only exemplary of the invention and that the principles of the technology may be employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (6)

1. A substation switch control system, comprising: the system comprises a transformer substation outgoing switch, a protection measurement and control device connected with the outgoing switch, a first communication terminal connected with the protection measurement and control device, and a second communication terminal respectively connected with the first communication terminal and a distributed terminal at the side of a first switch;
the distributed terminal is used for collecting fault information and action information of the first switch and sending the fault information and the action information to the second communication terminal; the second communication terminal is used for sending the fault information and the action information to the first communication terminal;
the first communication terminal is used for receiving fault information and action information sent by the second communication terminal and forwarding the fault information and the action information to the protection measurement and control device;
the protection measurement and control device is used for receiving fault information and action information forwarded by the first communication terminal and determining whether a closing instruction is generated or not according to the fault information and the action information to control reclosing of the outgoing line switch;
the protection measurement and control device comprises a receiving module and a control instruction generating module;
the receiving module is used for receiving fault information and switching action information from the first communication terminal;
the control instruction generating module is used for generating a closing control instruction to control the closing of the outgoing line switch when the receiving module receives first fault information and first switch action information, and generating a non-closing control instruction when the receiving module receives second fault information and second switch action information;
the distributed terminal comprises a fault detection module, an information generation module and an information sending module;
the fault detection module is used for detecting the current flowing through the primary switch;
the information generation module is used for determining that a fault occurs behind the first switch when the current is a fault current, generating first fault information and first switch action information, and determining that the fault occurs between the outgoing switch and the first switch when the fault detection module does not detect the fault current, and generating second fault information and second switch action information;
the information sending module is used for sending the first fault information and the first switch action information to the second communication terminal, or sending the second fault information and the second switch action information to the second communication terminal.
2. The substation switch control system according to claim 1, wherein the protection and monitoring device further comprises an outgoing switch monitoring module and a sending module;
the outgoing switch monitoring module is used for collecting the protection monitoring information of the outgoing switch and outputting the protection monitoring information to the sending module;
the sending module is used for sending the protection monitoring information to the first communication terminal, and the first communication terminal receives the protection monitoring information and forwards the protection monitoring information to the distributed terminal through the second communication terminal;
and the distributed terminal is also used for judging the line fault condition according to the protection monitoring information.
3. The substation switch control system of any one of claims 1-2, wherein the first and second communication terminals each comprise:
a processor;
the output end of the power supply circuit is connected with the processor to supply power to the processor;
a wired network interface connected to the processor;
a wireless module connected with the processor;
the RS232 serial port and/or the RJ45 network port are/is connected with the processor;
a USB interface and a storage medium connected with the processor;
the wired network interface is a cable Ethernet interface or an optical fiber Ethernet interface; the wireless module is one of a Bluetooth module, a WiFi module and a LoRa module.
4. The substation switch control system according to claim 3, wherein an input end of a power circuit of the first communication terminal is connected with a power supply of the protection measurement and control device, an input end of a power circuit of the second communication terminal is connected with a power supply of a distributed terminal on the first switch side, the first communication terminal is connected with the protection measurement and control device through the RS232 serial port and/or the RJ45 network port, the second communication terminal is connected with the distributed terminal on the first switch side through the RS232 serial port and/or the RJ45 network port, and the first communication terminal and the second communication terminal are connected through a wired network interface or a wireless module;
the first communication terminal and the second communication terminal are further used for storing the fault information and the switch action information to the storage medium and sending the fault information and the switch action information to the mobile terminal through the wireless module so as to display the fault information and the switch action information on the mobile terminal.
5. The substation switch control system according to any one of claims 1-2, wherein the protection and monitoring device is further connected to a comprehensive automation system of the substation;
the protection measurement and control device is also used for receiving a control instruction of the comprehensive automation system and controlling the tripping or closing of the outgoing switch according to the control instruction.
6. A transformer substation switch control method is applied to a transformer substation switch control system, and the transformer substation switch control system comprises the following steps: the transformer substation switch control method comprises the following steps of:
receiving fault information and action information forwarded by the first communication terminal, wherein the fault information and the action information are collected by the distributed terminal and then forwarded to the first communication terminal through the second communication terminal;
the distributed terminal generates fault information and action information in the following modes:
the distributed terminal detects the current flowing through the primary switch;
determining that a fault occurs after the first switch when the current is a fault current, and generating first fault information and first switching action information;
when the fault detection module does not detect fault current, determining that a fault occurs between the outgoing switch and the first switch and generating second fault information and second switch action information;
determining whether a closing instruction is generated or not according to the fault information and the action information to control reclosing of the outgoing line switch, wherein the method comprises the following steps:
generating a closing control instruction to control the closing of the outgoing line switch when the first fault information and the first switch action information are received, and recovering power supply to the area outside the fault area;
and generating a non-closing control instruction when the second fault information and the second switch action information are received, so as to prevent the switch from tripping again after closing.
CN202010848892.6A 2020-08-21 2020-08-21 Transformer substation switch control system and transformer substation switch control method Active CN111987801B (en)

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