CN114825287A - Power distribution fault processing method - Google Patents
Power distribution fault processing method Download PDFInfo
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- CN114825287A CN114825287A CN202210376056.1A CN202210376056A CN114825287A CN 114825287 A CN114825287 A CN 114825287A CN 202210376056 A CN202210376056 A CN 202210376056A CN 114825287 A CN114825287 A CN 114825287A
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- Prior art keywords
- fault
- power distribution
- power supply
- power
- automatic
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
-
- 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
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—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
Abstract
The invention discloses a power distribution fault processing method, which comprises the following steps: relay protection, automatic reclosing control, automatic spare power automatic switching control, starting condition judgment, fault information collection, fault positioning, fault isolation, power supply recovery in a sound area and complete power supply recovery; the power distribution fault processing method of the invention carries out perfect realization and support on the emergency and recovery control which needs to be controlled in a centralized way and the fault processing which is completed by utilizing the coordination of the distributed control function, and has good power distribution management benefit.
Description
The application is a divisional application, the original application is an invention patent named as 'a power distribution fault processing method', the application number of the original application is '2020103882606', and the application date is 5, month and 9 days in 2020.
Technical Field
The invention relates to the field of power grids, in particular to a power distribution fault processing method.
Background
During fault processing, fault positioning, isolation and power supply recovery can be performed according to fault information detected by each power distribution terminal, such as relay protection signals of a transformer substation, a switching station and the like and fault information of switch tripping and the like.
In the existing mode, except for the line automation function, the method is not well realized and supported for the emergency and recovery control which needs to be controlled in a centralized way and the fault treatment which is completed by utilizing the coordination of the distributed intelligent control function.
Disclosure of Invention
In order to solve the defects and shortcomings in the prior art, the power distribution fault processing method is characterized by comprising the following steps.
S1, relay protection. After a fault occurs, a local relay protection device of a substation outgoing line breaker or a line switch acts to trip the local relay protection device; and if the fault still exists after reclosing, the relay protection device acts again to enable the switch controlled by the relay protection device to trip.
And S2, automatic reclosing control. If the fault is an overhead line or a cable-overhead mixed line, the automatic reclosing controller can control the corresponding switch to reclose, if the fault is transient, the normal power supply is recovered, and if the fault is permanent, the protection action is caused to trip again.
And S3, automatic spare power automatic switching control. For an important user with double power supplies, when a fault occurs on one power supply path, the other power supply path is automatically switched to under the control of the automatic spare power automatic switching controller.
And S4, judging starting conditions. The starting condition is that the outgoing line breaker or the line switch of the transformer substation is tripped by protection action.
And S5, collecting fault information. The power distribution network control station collects information reported by each fault information collection device, and determines the time length set in the collection process according to the communication means adopted by the fault information collection devices.
And S6, fault positioning. After the fault information collection stage is finished, the power distribution network control station carries out fault positioning on the basis of mastering the global information, determines a minimum fault positioning area and a minimum fault automatic positioning area, displays a minimum fault automatic positioning result to a human-computer interface and stores a fault record.
And S7, fault isolation. After the fault positioning stage is finished, the power distribution network control station obtains a minimum fault isolation area and a minimum fault isolation area according to a fault automatic positioning result and the current network topology of the power distribution network, displays a human-computer interface, stores a fault record, automatically or manually confirms to execute corresponding switch remote control operation, and isolates the fault within the range of the minimum fault isolation area.
And S8, recovering power supply in a sound area. After the fault isolation stage is finished, the power distribution network control station automatically generates a power supply recovery scheme of the sound area according to the current network topology of the power distribution network and the load distribution of the sound area which is affected by the fault and has power failure before the fault, displays the power supply recovery scheme to a human-computer interface, stores a fault record, and automatically or manually confirms to execute corresponding switch remote control operation.
And S9, complete power supply recovery. For a power distribution network containing a distributed power supply with regulation capacity, such as a gas turbine, a water turbine and a diesel generator, after a power supply recovery stage of a sound area is finished, if power can be supplied to the power distribution network through an isolated island of the distributed power supply and the operation stability of the isolated island is ensured, a power distribution network control station automatically generates an isolated island isolation scheme and a black start scheme of each isolated island, displays a human-computer interface and stores fault records, and automatically or manually confirms to execute corresponding switch remote control operation.
The determining of the minimum fault location area and the minimum fault automatic location area includes determining a fault point or a fault range according to fault information reported by an installed fault information acquisition device, and further determining the minimum fault location area and the minimum fault automatic undetermined area, where the fault information acquisition devices are divided into two types: one type is a transmission type fault information acquisition device which can transmit fault information to a power distribution network control station; the other type is a local type fault information collection device that cannot transmit fault information to the distribution network control station. The fault information comprises fault current exceeding setting value, fault power direction, protection action, switch state and the like; the minimum fault positioning area is an area which is formed by surrounding of the fault information acquisition device and does not contain the fault information acquisition device any more; the minimum fault automatic positioning area is an area which is surrounded by the transmission type fault information acquisition devices and does not contain the transmission type fault information acquisition devices any more, and is called as a minimum fault automatic positioning area.
The minimum fault positioning area is a minimum area for carrying out fault positioning on the power distribution network in an automatic mode or a manual mode according to fault information, and the minimum fault automatic positioning area is a minimum area for carrying out fault positioning on the power distribution network control station. The minimum fault localization area includes one or more of the minimum fault localization areas.
Wherein, distribution network fault isolation relies on the switch of installation to carry out, the switch can be divided into two kinds: one is a switch capable of being remotely operated and is a remote-controllable switch, and the other is a switch incapable of being remotely operated and is a manual switch; the minimum fault isolation area is an area which is surrounded by the switches and does not contain the switches any more; the minimum fault automatic isolation area is an area which is surrounded by the remote-controlled switch and does not contain the remote-controlled switch any more.
The minimum fault isolation area is a minimum area for fault isolation of the power distribution network in a remote control mode or a manual mode, and the minimum fault automatic isolation area is a minimum area for fault isolation of the power distribution network control station in a remote control mode. The minimum fault isolation zone comprises one or more of the minimum fault isolation zones.
Further, the element enclosing the region is an end point of the region, for the minimum fault location region, the end point is a fault information acquisition device and a line end, and for the minimum fault automatic location region, the end point is a transmission type fault information acquisition device and a line end; for the minimum fault isolation zone, the endpoints are manual switches and line tips, and for the minimum fault isolation zone, the endpoints are remote control switches and line tips.
Preferably, after the step S9, the method further includes a fault query and demonstration, which obtains the accurate operation mode section at any historical time point through dynamic information database query, and obtains the current power grid model and graph. When fault tripping occurs, relevant data are automatically memorized according to the corresponding relation defined by a user, and the fault process of the power grid is demonstrated.
Specifically, a power grid model of a system during fault, a graph during fault and an event during fault occurrence are automatically matched and called according to a given fault recall moment, an event sequence occurring at that time is demonstrated on the basis, and a user is supported to control the progress of demonstration.
The power distribution fault processing method of the invention carries out perfect realization and support on the emergency and recovery control which needs to be controlled in a centralized way and the fault processing which is completed by utilizing the coordination of the distributed control function, and has good power distribution management benefit.
Drawings
Fig. 1 is a flow chart of a power distribution fault handling method of the present invention.
Detailed Description
As shown in fig. 1, the power distribution fault processing method of the present invention includes.
The power distribution network fault processing process is a process that a power distribution network control system executes emergency control and recovery control after a fault occurs, and comprises the following two sub-processes.
The local fast processing sub-process. When a fault occurs, the fault is controlled by a local device and automatically completed in a short time, and the local control generally comprises the following steps.
S1, relay protection. After a fault occurs, a local relay protection device of a substation outgoing line breaker or a line switch acts to trip the local relay protection device; and if the fault still exists after reclosing, the relay protection device acts again to enable the switch controlled by the relay protection device to trip.
And S2, automatic reclosing control. If the fault is an overhead line or a cable-overhead mixed line, the automatic reclosing controller can control the corresponding switch to reclose, if the fault is transient, the normal power supply is recovered, and if the fault is permanent, the protection action is caused to trip again.
And S3, automatic spare power automatic switching control. For an important user with double power supplies, when a fault occurs on one power supply path, the other power supply path is automatically switched to under the control of the automatic spare power automatic switching controller.
The failure handling sub-process is centralized. The emergency control and recovery control is completed under the control of a power distribution network control station and generally comprises the following steps.
And S4, judging starting conditions. The starting condition is that the outgoing line breaker or the line switch of the transformer substation is tripped by protection action. If the start condition is satisfied, the process proceeds to step S5.
And S5, collecting fault information. The power distribution network control station collects information reported by each fault information collection device, and determines the time length set in the collection process according to the communication means adopted by the fault information collection devices.
And S6, fault positioning. After the fault information collection stage is finished, the power distribution network control station carries out fault positioning on the basis of mastering the global information, determines a minimum fault positioning area and a minimum fault automatic positioning area, displays a minimum fault automatic positioning result to a human-computer interface and stores a fault record.
And S7, fault isolation. After the fault positioning stage is finished, the power distribution network control station obtains a minimum fault isolation area and a minimum fault isolation area according to a fault automatic positioning result and the current network topology of the power distribution network, displays a human-computer interface, stores a fault record, automatically or manually confirms to execute corresponding switch remote control operation, and isolates the fault within the range of the minimum fault isolation area.
And S8, recovering power supply in a sound area. After the fault isolation stage is finished, the power distribution network control station automatically generates a power supply recovery scheme of the sound area according to the current network topology of the power distribution network and the load distribution of the sound area which is affected by the fault and has power failure before the fault, displays the power supply recovery scheme to a human-computer interface, stores a fault record, and automatically or manually confirms to execute corresponding switch remote control operation.
And S9, complete power supply recovery. For a power distribution network containing a distributed power supply (such as a gas turbine, a water turbine, a diesel generator and the like) with regulation capacity, after the power supply recovery stage of a sound area is finished, if the power supply can be supplied to the power distribution network through an isolated island of the distributed power supply and the operation stability of the isolated island is ensured, a power distribution network control station automatically generates an isolated island isolation scheme and a black start scheme of each isolated island, displays a human-computer interface and stores fault records, and automatically or manually confirms to execute corresponding switch remote control operation.
Step S8 is performed before S9, with the aim of recovering the load power supply using the main power supply to the maximum extent, and recovering as much load power supply as possible in consideration of the role of the distributed power supply with regulation capability only when the main power supply cannot satisfy the partial load power supply.
The determining of the minimum fault location area and the minimum fault automatic location area includes determining a fault point or a fault range according to fault information reported by an installed fault information acquisition device, and further determining the minimum fault location area and the minimum fault automatic undetermined area, where the fault information acquisition device is divided into two types: one type is a transmission type fault information acquisition device which can transmit fault information to a power distribution network control station; the other type is a local type fault information collection device that cannot transmit fault information to the distribution network control station. The fault information comprises fault current exceeding setting value, fault power direction, protection action, switch state and the like; the minimum fault positioning area is an area which is formed by surrounding of the fault information acquisition device and does not contain the fault information acquisition device any more; the minimum fault automatic positioning area is an area which is surrounded by the transmission type fault information acquisition devices and does not contain the transmission type fault information acquisition devices any more, and is called as a minimum fault automatic positioning area.
The minimum fault positioning area is a minimum area for carrying out fault positioning on the power distribution network in an automatic mode or a manual mode according to fault information, and the minimum fault automatic positioning area is a minimum area for carrying out fault positioning on the power distribution network control station. The minimum fault localization area includes one or more of the minimum fault localization areas.
Wherein, distribution network fault isolation relies on the switch of installation to carry out, the switch can be divided into two kinds: one is a switch capable of being remotely operated and is a remote-controllable switch, and the other is a switch incapable of being remotely operated and is a manual switch; the minimum fault isolation area is an area which is surrounded by the switches and does not contain the switches any more; the minimum fault automatic isolation area is an area which is surrounded by the remote-controlled switch and does not contain the remote-controlled switch any more.
The minimum fault isolation area is a minimum area for fault isolation of the power distribution network in a remote control mode or a manual mode, and the minimum fault automatic isolation area is a minimum area for fault isolation of the power distribution network control station in a remote control mode. The minimum fault isolation zone comprises one or more of the minimum fault isolation zones.
Further, the element enclosing the region is an end point of the region, for the minimum fault location region, the end point is a fault information acquisition device and a line end, and for the minimum fault automatic location region, the end point is a transmission type fault information acquisition device and a line end; for the minimum fault isolation zone, the endpoints are manual switches and line tips, and for the minimum fault isolation zone, the endpoints are remote control switches and line tips.
Preferably, after the step S9, the method further includes, fault query and demonstration, obtaining a precise operation mode section at any historical time point through dynamic information database query, and obtaining a current power grid model and a current graph. When fault tripping occurs, relevant data are automatically memorized according to the corresponding relation defined by a user, and the fault process of the power grid is demonstrated.
Specifically, a power grid model of a system during fault, a graph during fault and an event during fault occurrence are automatically matched and called according to a given fault recall moment, an event sequence occurring at that time is demonstrated on the basis, and a user is supported to control the progress of demonstration.
The power distribution fault processing method of the invention carries out perfect realization and support on the emergency and recovery control which needs to be controlled in a centralized way and the fault processing which is completed by utilizing the coordination of the distributed control function, and has good power distribution management benefit.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The power distribution fault processing method is characterized by comprising the following steps:
s1, relay protection;
s2, automatic reclosing control;
s3, automatic spare power automatic switching control;
s4, judging starting conditions;
s5, collecting fault information;
s6, fault positioning;
s7, fault isolation;
s8, recovering power supply in a sound area;
and S9, complete power supply recovery.
2. The method according to claim 1, wherein S1. relay protection; after a fault occurs, a local relay protection device of a substation outgoing line breaker or a line switch acts to trip the local relay protection device; and if the fault still exists after reclosing, the relay protection device acts again to enable the switch controlled by the relay protection device to trip.
3. The method according to claim 1, wherein s2. automatic reclosing control; if the fault is an overhead line or a cable-overhead mixed line, the automatic reclosing controller can control the corresponding switch to reclose, if the fault is transient, the normal power supply is recovered, and if the fault is permanent, the protection action is caused to trip again.
4. The method according to claim 1, wherein S3. automatic spare power automatic switching control; for an important user with double power supplies, when a fault occurs on one power supply path, the other power supply path is automatically switched to under the control of the automatic spare power automatic switching controller.
5. The method of claim 1, wherein the start condition is a substation outlet circuit breaker or line switch trip on protection action.
6. The method according to claim 1, wherein S5. failure information collection; the power distribution network control station collects information reported by each fault information collection device, and determines the time length set in the collection process according to the communication means adopted by the fault information collection devices.
7. The method according to claim 1, characterized in that S6. fault location; after the fault information collection stage is finished, the power distribution network control station carries out fault positioning on the basis of mastering the global information, determines a minimum fault positioning area and a minimum fault automatic positioning area, displays a minimum fault automatic positioning result to a human-computer interface and stores a fault record.
8. The method according to claim 1, wherein S7. fault isolation; after the fault positioning stage is finished, the power distribution network control station obtains a minimum fault isolation area and a minimum fault isolation area according to a fault automatic positioning result and the current network topology of the power distribution network, displays a human-computer interface, stores a fault record, automatically or manually confirms to execute corresponding switch remote control operation, and isolates the fault within the range of the minimum fault isolation area.
9. The method according to claim 1, wherein S8. recovery of power supply in a healthy area; after the fault isolation stage is finished, the power distribution network control station automatically generates a power supply recovery scheme of the sound area according to the current network topology of the power distribution network and the load distribution of the sound area which is affected by the fault and has power failure before the fault, displays the power supply recovery scheme to a human-computer interface, stores a fault record, and automatically or manually confirms to execute corresponding switch remote control operation.
10. The method according to claim 1, wherein S9. full power restoration; for a power distribution network containing a distributed power supply with regulation capacity, such as a gas turbine, a water turbine, a diesel generator and the like, after a power supply recovery stage of a sound area is finished, if power can be supplied to the power distribution network through an isolated island of the distributed power supply and the operation stability of the isolated island is ensured, a power distribution network control station automatically generates an isolated island isolation scheme and a black start scheme of each isolated island, displays a human-computer interface and stores fault records, and automatically or manually confirms to execute corresponding switch remote control operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210376056.1A CN114825287A (en) | 2020-05-09 | 2020-05-09 | Power distribution fault processing method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210376056.1A CN114825287A (en) | 2020-05-09 | 2020-05-09 | Power distribution fault processing method |
| CN202010388260.6A CN111431150A (en) | 2020-05-09 | 2020-05-09 | Power distribution fault processing method |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010388260.6A Division CN111431150A (en) | 2020-05-09 | 2020-05-09 | Power distribution fault processing method |
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| CN114825287A true CN114825287A (en) | 2022-07-29 |
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| CN202010388260.6A Withdrawn CN111431150A (en) | 2020-05-09 | 2020-05-09 | Power distribution fault processing method |
| CN202210376056.1A Withdrawn CN114825287A (en) | 2020-05-09 | 2020-05-09 | Power distribution fault processing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116979478A (en) * | 2023-09-25 | 2023-10-31 | 广东电网有限责任公司中山供电局 | Reclosing control method and system based on improved anti-islanding protection strategy |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944160B (en) * | 2014-04-09 | 2015-10-07 | 国家电网公司 | A kind of distribution network protection based on distributed power generation characteristic and automatics fitting method |
| CN106100117A (en) * | 2016-06-15 | 2016-11-09 | 国家电网公司 | Distributed feeder-terminal-unit collocation method based on minimum distribution region |
| CN108548992B (en) * | 2018-05-30 | 2021-03-02 | 广东电网有限责任公司 | Distribution network fault positioning method based on assumed fault area |
-
2020
- 2020-05-09 CN CN202010388260.6A patent/CN111431150A/en not_active Withdrawn
- 2020-05-09 CN CN202210376056.1A patent/CN114825287A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116979478A (en) * | 2023-09-25 | 2023-10-31 | 广东电网有限责任公司中山供电局 | Reclosing control method and system based on improved anti-islanding protection strategy |
| CN116979478B (en) * | 2023-09-25 | 2024-01-23 | 广东电网有限责任公司中山供电局 | Reclosing control method and system based on improved anti-islanding protection strategy |
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| CN111431150A (en) | 2020-07-17 |
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