CN112865320B - Power grid self-healing control method and device based on power loss path information flow transition and flexible level difference - Google Patents

Power grid self-healing control method and device based on power loss path information flow transition and flexible level difference Download PDF

Info

Publication number
CN112865320B
CN112865320B CN202110210733.8A CN202110210733A CN112865320B CN 112865320 B CN112865320 B CN 112865320B CN 202110210733 A CN202110210733 A CN 202110210733A CN 112865320 B CN112865320 B CN 112865320B
Authority
CN
China
Prior art keywords
self
healing
protection device
message
power
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202110210733.8A
Other languages
Chinese (zh)
Other versions
CN112865320A (en
Inventor
柳昀
胡兵
王闰羿
陈栋
齐以年
李玉平
张玮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing SAC Automation Co Ltd
Original Assignee
Nanjing SAC Automation Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nanjing SAC Automation Co Ltd filed Critical Nanjing SAC Automation Co Ltd
Priority to CN202110210733.8A priority Critical patent/CN112865320B/en
Publication of CN112865320A publication Critical patent/CN112865320A/en
Application granted granted Critical
Publication of CN112865320B publication Critical patent/CN112865320B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • 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
    • H02H3/06—Details with automatic reconnection
    • 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
    • H02J13/00006—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
    • 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
    • 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
    • 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
    • Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
    • Y04S10/52—Outage or fault management, e.g. fault detection or location
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

The invention discloses a power grid self-healing control method and device based on power loss path information transfer and extremely poor flexibility, and aims to solve the technical problem that regional power supply cannot be quickly and accurately recovered in a complex power distribution system. It includes: after the power distribution network line trips, generating a self-healing message signal by using a protection device corresponding to the trip switch; transferring the self-healing message signals to the protection devices on the upstream and downstream of the trip switch through a communication network, and judging the electrified state of the protection device receiving the self-healing message signals according to a preset voltage value after each transfer; judging message circulation according to the charged state of the protection device; and acquiring a self-healing message signal when the circulation is terminated, and recovering power supply of the power-losing area by using a breaker switch according to the preset step time. The method and the device can quickly and accurately recover the power supply of the power-losing area in a short time, and greatly improve the power distribution automation self-healing recovery power supply capacity and probability.

Description

Power grid self-healing control method and device based on power loss path information flow transition and flexible level difference
Technical Field
The invention relates to a power grid self-healing control method and device based on power loss path information transfer and flexible level difference, and belongs to the technical field of power system relay protection.
Background
With the increase of power demand, the structure of a power distribution network of a power system becomes increasingly complex, and how to quickly and accurately recover power supply of a power loss load after a power grid fails or after electrical equipment is overhauled has a certain positive effect on improving the reliability of power supply of the power grid, reducing power failure time and improving production efficiency.
In a power distribution system, when a power grid fails or equipment is overhauled due to power failure, power transfer is generally realized through a power supply spare power automatic switching device, or power supply is recovered by reclosing after a line fails, however, in a complex regional power distribution system, a plurality of voltage nodes of the power system need to recover power supply, and the existing methods cannot reliably and accurately recover the power supply of the regional power distribution system in a short time.
Disclosure of Invention
In order to solve the problem that regional power supply cannot be quickly and accurately recovered in a complex power distribution system, the invention provides a power grid self-healing control method and a device thereof based on power loss path information flow and flexible level difference.
In order to solve the technical problems, the invention adopts the following technical means:
in a first aspect, the invention provides a power grid self-healing control method based on power loss path information flow transfer and flexible level difference, which comprises the following steps:
after the power distribution network line trips, generating a self-healing message signal by using a protection device corresponding to the trip switch;
transferring the self-healing message signals to the protection devices on the upstream and downstream of the trip switch through a communication network, and judging the electrified state of the protection device receiving the self-healing message signals according to a preset voltage value after each transfer;
judging message circulation according to the charged state of the protection device;
and acquiring a self-healing message signal when the circulation is terminated, and recovering power supply of the power-losing area by using a breaker switch according to the preset step time.
With reference to the first aspect, further, the method further includes the following steps:
protection devices are respectively configured on a power distribution network line and a section switch, and a communication network is constructed between the protection devices by using an optical fiber or a wireless network.
With reference to the first aspect, further, the self-healing message signal includes a self-healing allowing command and a message flow-forwarding number n.
With reference to the first aspect, further, the circulation of the self-healing message signal includes intra-station circulation and extra-station circulation; the in-station circulation refers to self-healing message signal circulation among the protection devices of the internal lines of a single transformer substation, and the message format of the self-healing message signals circulated in the station is GOOSE; the out-of-station flow refers to the flow of self-healing message signals between the protection devices at the two sides of the circuit of the two transformer substations, and the self-healing message signals flowing out of the station are embedded in sampling data messages of the longitudinal differential protection of the circuit.
With reference to the first aspect, further, the specific operation of determining the charging state is as follows:
when a protection device receives a self-healing message signal, judging whether a branch in which the protection device is positioned is provided with a voltage sensor or not according to a voltage set value of the protection device;
when a branch where the protection device is located is provided with a voltage sensor, respectively acquiring bus voltage and branch voltage by using the voltage sensor, respectively comparing the bus voltage and the branch voltage with a preset voltage value, and when the bus voltage or the branch voltage is smaller than the preset voltage value, judging that a bus side or a branch side of a breaker switch corresponding to the protection device is uncharged, otherwise, judging that the bus side or the branch side of the breaker switch corresponding to the protection device is charged;
when the branch where the protection device is located is not provided with the voltage sensor, the voltage sensor is utilized to collect bus voltage, the bus voltage is compared with a preset voltage value, when the bus voltage is smaller than the preset voltage value, the bus side of the breaker switch corresponding to the protection device is judged to be uncharged, otherwise, the bus side of the breaker switch corresponding to the protection device is judged to be charged.
With reference to the first aspect, further, the specific operation of performing the message flow judgment according to the charged state of the protection device is as follows:
acquiring the electrified state of a breaker switch corresponding to the protection device receiving the self-healing message signal;
when both sides of the breaker switch are not electrified, updating the message transfer times in the self-healing message signals to enable n = n +1, and forwarding the updated self-healing message signals to the adjacent protection device by using the protection device;
when one side of the breaker switch is electrified and the other side of the breaker switch is not electrified, the circulation of the self-healing message signals is stopped, and the automatic message signals of the current protection device are obtained.
With reference to the first aspect, further, the specific operation of recovering the power supply of the power loss area by using the breaker switch is as follows:
obtaining a self-healing message signal when the circulation is terminated, and determining a power loss area according to a protection device corresponding to the self-healing message signal when the circulation is terminated;
according to a preset step time T delay And controlling the protection devices in the power failure area one by one to execute self-healing control logic, and controlling the closing of the breaker switch corresponding to each protection device according to the allowed self-healing command to recover the power supply of the power failure area.
With reference to the first aspect, further, the total duration of the power restoration of the power loss region is n × T delay ， T delay The value range of (a) is 0.3 to 0.5s.
In a second aspect, the present invention provides a power grid self-healing control device based on power loss path information flow transition and flexible level difference, including:
the message generating module is used for generating a self-healing message signal by utilizing a protection device corresponding to the trip switch after the power distribution network line trips;
the message transfer module is used for transferring the self-healing message signals to the protection devices on the upstream and downstream of the trip switch through a communication network and judging message transfer according to the charged state of the protection devices;
the electrified judging module is used for judging the electrified state of the protection device receiving the self-healing message signal according to a preset voltage value after each circulation of the self-healing message signal;
and the self-healing control module is used for recovering power supply of the power-losing area by utilizing the breaker switch according to the preset step time after the self-healing message signal flow is terminated.
With reference to the second aspect, further, the value range of the preset voltage value is 50V to 100V; the value range of the preset step time is 0.3-0.5 s.
The following advantages can be obtained by adopting the technical means:
the invention provides a power grid self-healing control method and a device thereof based on power loss path information transfer and flexible level difference. The method has low complexity, can accurately sense the working condition of primary equipment in a power loss area, and can realize flexible level difference control of a power distribution system by carrying out batch delayed switching on different protection devices, thereby greatly improving the power supply self-healing recovery capability and probability of power distribution automation. The method can quickly and accurately recover the power supply of the power loss area in a short time, and particularly has a positive effect on quick self-healing of the complex power distribution network after the complex power distribution network fails.
Drawings
FIG. 1 is a flowchart of steps of a power grid self-healing control method based on power loss path information transfer and flexible level difference according to the present invention;
fig. 2 is an operation flowchart of a power grid self-healing control method in the embodiment of the present invention;
FIG. 3 is a schematic diagram of a power distribution network of the power system according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of the power grid self-healing control device based on power loss path information transfer and flexible level difference according to the present invention;
in the figure, 1 is a message generation module, 2 is a message transfer module, 3 is an electrified judgment module, and 4 is a self-healing control module.
Detailed Description
The technical scheme of the invention is further explained by combining the accompanying drawings as follows:
the invention provides a power grid self-healing control method based on power loss path information transfer and flexible level difference, which specifically comprises the following steps as shown in figures 1 and 2:
and step A, respectively configuring protection devices on a power distribution network line and a section switch, and constructing a communication network between the protection devices by using an optical fiber or a wireless network. Fig. 3 is a block diagram of a power distribution network of an electric power system, in which a bus and each branch of the power distribution network are provided with a switch, and a protection device is generally configured in one switch, and each protection device is connected through an optical fiber or a wireless network to form a communication link between the protection devices. In addition, a bus in the power distribution network is provided with a voltage sensor, branch lines of the power distribution network are provided with the voltage sensor according to the planning design of the power distribution network, and generally, at least one side of each branch line is provided with the voltage sensor.
And step B, after the power distribution network line trips, generating a self-healing message signal by using a protection device corresponding to the trip switch, wherein the self-healing message signal mainly comprises a self-healing allowing command and message flow-transfer times n, and n =0 when the self-healing message signal is just generated.
And C, transferring the self-healing message signals to the protection devices at the upstream and downstream of the trip switch through a communication network, and judging the electrified state of the protection device receiving the self-healing message signals according to a preset voltage value after each transfer.
According to the complexity of the power distribution network, the circulation of the self-healing message signals can be divided into intra-station circulation and out-station circulation, wherein the intra-station circulation refers to the circulation of the self-healing message signals among the protection devices of the internal circuits of a single transformer substation, namely the self-healing message signals are only forwarded inside one transformer substation, and the message format of the self-healing message signals circulated in the station is GOOSE; the outer circulation of standing refers to the self-healing message signal circulation between the protection device of the circuit both sides of connecting two transformer substations, and the self-healing message signal can circulate between 2 at least transformer substations, and the self-healing message signal embedded of the outer circulation of standing is in the sampling data message of the differential protection of circuit longitudinal joint.
The specific operation of judging the charged state in the embodiment of the invention is as follows:
and step C01, when a protection device receives the self-healing message signal, judging whether a branch where the protection device is located is provided with a voltage sensor according to a voltage set value of the protection device, wherein the voltage sensor is inevitably arranged on the bus side when a branch appears on a bus in the power distribution network.
And step C02, when a branch in which the protection device is positioned is provided with a voltage sensor, respectively acquiring bus voltage and branch voltage by using the voltage sensors on the bus and the branch, and respectively comparing the bus voltage and the branch voltage with preset voltage values, wherein the value range of the preset voltage values is 50V-100V, and preferably 70V. When the bus voltage or the branch voltage is smaller than the preset voltage value, the bus side or the branch side of the breaker switch corresponding to the protection device is judged to be uncharged, otherwise, the bus side or the branch side of the breaker switch corresponding to the protection device is judged to be charged.
And step C03, when the branch where the protection device is located is not provided with a voltage sensor, collecting the bus voltage by using the voltage sensor on the bus, comparing the bus voltage with a preset voltage value, judging that the bus side of the breaker switch corresponding to the protection device is uncharged when the bus voltage is smaller than the preset voltage value, and otherwise, judging that the bus side of the breaker switch corresponding to the protection device is charged. The electrified state of the branch road side of the breaker switch corresponding to the protection device can be judged through the protection device on the opposite side of the branch road.
Step D, judging message flow according to the charged state of the protection device, and specifically operating as follows:
and D01, acquiring the electrified state of the breaker switch corresponding to the protection device receiving the self-healing message signal, and specifically dividing the electrified state into a bus side electrified state and a branch side electrified state.
Step D02, when both sides of the breaker switch are not electrified (namely, both the bus side and the branch side are not electrified), updating the message circulation times in the self-healing message signals, and enabling n = n +1, and forwarding the updated self-healing message signals to the adjacent protection device by using the protection device; when no voltage sensor is arranged on a branch of the breaker switch, the electrified state of the branch side cannot be judged, and the bus side is not electrified, the message is continuously transferred according to the operation.
And D03, when one side of the breaker switch is electrified and the other side of the breaker switch is not electrified, the fact that the protection device located at the edge of the power-off area is found means that the circulation of the self-healing message signals is stopped, and the automatic message signals of the current protection device are obtained.
The protection device can respectively send self-healing message signals to upstream and downstream through a communication network, whether the messages need to be continuously transferred or not is judged according to the charged state of the protection device receiving the self-healing message signals, when the messages need to be continuously transferred, the protection device can send the self-healing message signals to the protection device on the same side, and if the protection device of the trip switch is P 0 The upstream protective devices are respectively P 1 、P 2 、P 3 823060, 8230and P-ion downstream protection devices 1 、P- 2 、P- 3 823060 \ 8230'; when protection device P 1 When both sides of (A) are not charged, P 1 Will add 1 to the message circulation times and send the updated self-healing message signal to P 2 。
Step E, obtaining a self-healing message signal when the circulation is terminated, and recovering power supply of a power-off area by using a breaker switch according to preset step time, wherein the operation is as follows:
and E01, acquiring the self-healing message signals when the circulation is terminated, wherein the self-healing message signals of the upstream and the downstream and the upstream and the downstream corresponding protection devices thereof can be acquired respectively when the circulation is completely terminated due to the existence of the self-healing message signals in the upstream and the downstream, and determining a power loss area according to the protection device corresponding to the self-healing message signals when the circulation is terminated.
Step E02, according to the self-healing allowing command in the self-healing message signal and the preset level difference time T delay And controlling the protection devices in the power failure area one by one to execute self-healing control logic, and controlling the closing of the breaker switch corresponding to each protection device according to the allowed self-healing command to recover the power supply of the power failure area. In order to improve the stability and reliability of power supply, the circuit breaker switches are gradually closed inwards from the outermost periphery of a power loss area, the power supply is recovered section by section, and the closing time difference of two adjacent circuit breaker switches is T delay Thus, the entire power loss region passes through nT delay The power supply can be completely restored. In the embodiment of the invention, T delay The value range of (A) is 0.3-0.5 s.
The invention also provides a power grid self-healing control device based on power loss path information transfer and flexible level difference, which mainly comprises a message generation module 1, a message transfer module 2, a live judgment module 3 and a self-healing control module 4 as shown in fig. 4. The message generation module is mainly used for generating a self-healing message signal by using a protection device corresponding to the trip switch after the power distribution network line trips, wherein the self-healing message signal comprises a self-healing allowing command and message conversion times n; the message transfer module is used for transferring the self-healing message signals to the protection devices on the upstream and downstream of the trip switch through a communication network, and is used for judging message transfer according to the charged state of the protection devices; the charging judgment module is mainly used for judging the charging state of the protection device receiving the self-healing message signal according to a preset voltage value after each circulation of the self-healing message signal, wherein the value range of the preset voltage value is 50-100V, and 70V is preferred; the self-healing control module is mainly used for recovering power supply of a power-off area by using a breaker switch according to preset step time after the self-healing message signal flow is terminated, wherein the value range of the preset step time is 0.3-0.5 s.
The method has low complexity, can accurately sense the working condition of primary equipment in a power loss area, and can realize flexible level difference control of a power distribution system by carrying out batch delayed switching on different protection devices, thereby greatly improving the power supply self-healing recovery capability and probability of power distribution automation. The method can quickly and accurately recover the power supply of the power loss area in a short time, and particularly has an active effect on quick self-healing of a complex power distribution network after a fault occurs.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various improvements and modifications without departing from the technical principle of the present invention, and those improvements and modifications should be considered as the protection scope of the present invention.

Claims (9)

1. The power grid self-healing control method based on power loss path information transfer and flexible level difference is characterized by comprising the following steps of:
after the power distribution network line trips, generating a self-healing message signal by using a protection device corresponding to the trip switch;
transferring the self-healing message signals to the protection devices on the upstream and downstream of the trip switch through a communication network, and judging the electrified state of the protection device receiving the self-healing message signals according to a preset voltage value after each transfer;
judging message circulation according to the charged state of the protection device;
acquiring a self-healing message signal when the circulation is terminated, and recovering power supply of a power-losing area by using a breaker switch according to preset stage difference time;
the specific operation of judging the message flow according to the charged state of the protection device is as follows:
acquiring the electrified state of a breaker switch corresponding to the protection device receiving the self-healing message signal;
when both sides of the breaker switch are not electrified, updating the message transfer times in the self-healing message signals to enable n = n +1, and forwarding the updated self-healing message signals to the adjacent protection device by using the protection device;
when one side of the breaker switch is electrified and the other side of the breaker switch is not electrified, the circulation of the self-healing message signals is stopped, and the automatic message signals of the current protection device are obtained.
2. The power grid self-healing control method based on power loss path information flow and flexibility level difference as claimed in claim 1, further comprising the steps of:
protection devices are respectively configured on a power distribution network line and a section switch, and a communication network is constructed between the protection devices by using an optical fiber or a wireless network.
3. The power grid self-healing control method based on power loss path information flow transition and flexibility level difference according to claim 1, wherein the self-healing message signal comprises a self-healing allowing command and a message flow transition number n.
4. The power grid self-healing control method based on power loss path information flow and flexible level difference as claimed in claim 1, wherein the flow of the self-healing message signal comprises an intra-station flow and an extra-station flow; the in-station circulation refers to self-healing message signal circulation among the protection devices of the internal lines of a single transformer substation, and the message format of the self-healing message signals circulated in the station is GOOSE; the out-of-station flow switching refers to the flow of self-healing message signals between the protection devices at two sides of the line connecting the two substations, and the self-healing message signals flowing out of the station are embedded in sampling data messages of the line longitudinal differential protection.
5. The power grid self-healing control method based on power loss path information flow and flexible level difference as claimed in claim 1, wherein the specific operation of judging the charged state is as follows:
when a protection device receives a self-healing message signal, judging whether a branch in which the protection device is positioned is provided with a voltage sensor or not according to a voltage set value of the protection device;
when a branch where the protection device is located is provided with a voltage sensor, respectively acquiring bus voltage and branch voltage by using the voltage sensor, respectively comparing the bus voltage and the branch voltage with a preset voltage value, and when the bus voltage or the branch voltage is smaller than the preset voltage value, judging that a bus side or a branch side of a breaker switch corresponding to the protection device is uncharged, otherwise, judging that the bus side or the branch side of the breaker switch corresponding to the protection device is charged;
when the branch where the protection device is located is not provided with the voltage sensor, the voltage sensor is utilized to collect bus voltage, the bus voltage is compared with a preset voltage value, when the bus voltage is smaller than the preset voltage value, the bus side of the breaker switch corresponding to the protection device is judged to be uncharged, otherwise, the bus side of the breaker switch corresponding to the protection device is judged to be charged.
6. The power grid self-healing control method based on power loss path information flow and flexible level difference as claimed in claim 1, wherein the specific operation of recovering power supply of the power loss area by using the breaker switch is as follows:
obtaining a self-healing message signal when the circulation is terminated, and determining a power loss area according to a protection device corresponding to the self-healing message signal when the circulation is terminated;
according to a preset step time T delay And controlling the protection devices in the power failure area one by one to execute self-healing control logic, and controlling the closing of the breaker switch corresponding to each protection device according to the allowed self-healing command to recover the power supply of the power failure area.
7. The power grid self-healing control method based on power loss path information flow transfer and flexible level difference as claimed in claim 6, wherein the total duration of recovering power supply in a power loss area is n x T delay ，T delay The value range of (A) is 0.3-0.5 s.
8. Electric wire netting self-healing controlling means based on lose electric route information circulation and flexibility level difference, its characterized in that includes:
the message generating module is used for generating a self-healing message signal by utilizing a protection device corresponding to the trip switch after the power distribution network line trips;
the message transfer module is used for transferring the self-healing message signals to the protection devices on the upstream and downstream of the trip switch through a communication network and judging message transfer according to the charged state of the protection devices;
the electrified judging module is used for judging the electrified state of the protection device receiving the self-healing message signal according to a preset voltage value after each circulation of the self-healing message signal;
the self-healing control module is used for recovering power supply of a power-losing area by utilizing a breaker switch according to preset step difference time after the self-healing message signal flow is terminated;
in the message transfer module, the specific operation of judging the message transfer according to the charged state of the protection device is as follows:
acquiring the electrified state of a breaker switch corresponding to the protection device receiving the self-healing message signal;
when both sides of the breaker switch are not electrified, updating the message transfer times in the self-healing message signals to enable n = n +1, and forwarding the updated self-healing message signals to the adjacent protection device by using the protection device;
when one side of the breaker switch is electrified and the other side of the breaker switch is not electrified, the circulation of the self-healing message signals is stopped, and the automatic message signals of the current protection device are obtained.
9. The power grid self-healing control device based on power loss path information flow and flexible level difference as claimed in claim 8, wherein the preset voltage value ranges from 50V to 100V; the value range of the preset step time is 0.3-0.5 s.
CN202110210733.8A 2021-02-25 2021-02-25 Power grid self-healing control method and device based on power loss path information flow transition and flexible level difference Active CN112865320B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110210733.8A CN112865320B (en) 2021-02-25 2021-02-25 Power grid self-healing control method and device based on power loss path information flow transition and flexible level difference

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110210733.8A CN112865320B (en) 2021-02-25 2021-02-25 Power grid self-healing control method and device based on power loss path information flow transition and flexible level difference

Publications (2)

Publication Number Publication Date
CN112865320A CN112865320A (en) 2021-05-28
CN112865320B true CN112865320B (en) 2023-03-24

Family

ID=75989911

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110210733.8A Active CN112865320B (en) 2021-02-25 2021-02-25 Power grid self-healing control method and device based on power loss path information flow transition and flexible level difference

Country Status (1)

Country Link
CN (1) CN112865320B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113964801B (en) * 2021-10-13 2024-06-18 南京南瑞继保电气有限公司 Distance protection optimization method and device for high-voltage line protection device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102738777A (en) * 2012-06-20 2012-10-17 广西电网公司电力科学研究院 Rapid distribution network fault self-recovery method based on generic object oriented substation event (GOOSE) message
CN109995024B (en) * 2019-03-07 2020-12-29 广东电网有限责任公司 Multi-stage power grid collaborative self-healing system and method
CN111786364B (en) * 2020-06-02 2022-11-04 国电南瑞科技股份有限公司 Distributed-based complex power distribution network fault rapid self-healing control method and system
CN112165090A (en) * 2020-09-29 2021-01-01 国电南瑞南京控制***有限公司 Cooperative self-healing system and method

Also Published As

Publication number Publication date
CN112865320A (en) 2021-05-28

Similar Documents

Publication Publication Date Title
CN103354390B (en) Distributed intelligence feeder automation control method
CN109347093B (en) Power distribution network self-healing control method combining master station with local control
CN103022994B (en) Method for achieving fault isolation and recovery of power distribution network with permeability distribution type power supply
CN102213735B (en) Typical test network with power distribution automation
CN107069676A (en) Power distribution network fault positioning and rapid isolation recovery control method
CN104113141B (en) A kind of intelligence longitudinally interconnects feeder automation control method
CN112165090A (en) Cooperative self-healing system and method
CN105140894A (en) Phase difference principle based power distribution network differential protection method
CN103683217B (en) A kind of fault location protection device based on Intelligent terminal of distribution network and method
CN104518564A (en) Backup automatic switching apparatus with area automatic switching function, and backup automatic switching method
CN111711965B (en) Intelligent distributed FA fault positioning method based on wireless communication
CN110021919A (en) Intensive bridge-type multiport mixed DC breaker and control method
CN204928156U (en) Distribution network bridge joint line structure
CN204068430U (en) A kind of intelligence longitudinally interconnected feeder automation control system
CN111030058A (en) Power distribution network partition protection method based on 5G communication
CN205753377U (en) Looped network cyclization rack system based on distribution power automation terminal
CN111682508A (en) Differential protection and rapid self-healing method suitable for regional power distribution network
CN112865320B (en) Power grid self-healing control method and device based on power loss path information flow transition and flexible level difference
CN106385013B (en) The fault location shielding system and its working method of the adaptive power distribution network method of operation
CN109768544B (en) Regional power grid load transfer method
CN104319743A (en) Method and device for quick backup protection of high-voltage side of main transformer based on station region information
CN202550668U (en) Distributed power distribution network management terminal
CN108493928B (en) Distributed feeder automation distribution line topology ad hoc network method
CN210780224U (en) Distribution network fault self-healing device
CN105207182B (en) Method and system for protecting power distribution network area

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant