WO2014089958A1 - Procédé d'isolation de défaillance de réseau de distribution et de reprise sur défaillance de réseau de distribution réalisant une génération distribuée par pénétration - Google Patents

Procédé d'isolation de défaillance de réseau de distribution et de reprise sur défaillance de réseau de distribution réalisant une génération distribuée par pénétration Download PDF

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Publication number
WO2014089958A1
WO2014089958A1 PCT/CN2013/076697 CN2013076697W WO2014089958A1 WO 2014089958 A1 WO2014089958 A1 WO 2014089958A1 CN 2013076697 W CN2013076697 W CN 2013076697W WO 2014089958 A1 WO2014089958 A1 WO 2014089958A1
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WO
WIPO (PCT)
Prior art keywords
switch
fault
distribution network
recovery
distributed power
Prior art date
Application number
PCT/CN2013/076697
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English (en)
Chinese (zh)
Inventor
柳劲松
周健
时珊珊
徐琴
Original Assignee
上海市电力公司
华东电力试验研究院有限公司
国家电网公司
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.)
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Application filed by 上海市电力公司, 华东电力试验研究院有限公司, 国家电网公司 filed Critical 上海市电力公司
Publication of WO2014089958A1 publication Critical patent/WO2014089958A1/fr

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Classifications

    • 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
    • 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
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks

Definitions

  • the invention belongs to the field of operation and management of a distribution network, and in particular relates to a method for fault isolation and recovery for a distribution network. Background technique
  • Feeder automation is an important part of distribution network automation. It can quickly isolate faults, restore power supply in non-faulty areas, and improve the reliability of distribution network.
  • the announcement date is January 19, 2011, the Chinese invention patent with the authorization announcement number CN 101552461B, and discloses a "including distributed power supply distribution network protection method", which has one or one for the distribution network bus.
  • the direction longitudinal protection device is installed, and the time-limited overcurrent protection mode with directional components is used in the area;
  • the direction longitudinal protection device is installed, and the overcurrent protection device is installed in the downstream area, and
  • the entire area uses inverse time overcurrent protection. It can be seen that the technical solution mainly improves the conventional current protection configuration to ensure reliable removal of the fault of the DG distribution system.
  • the technical problem to be solved by the present invention is to provide a distribution network fault isolation and recovery method for implementing a distributed distributed power source, which is based on an intelligent distributed feeder automation mode to implement fault isolation of a distribution network including distributed power sources.
  • the recovery process the degree of intelligence in the troubleshooting and recovery process is high, the judgment is rapid and accurate, and the logic conditions can be modified and supplemented according to the actual topology of the power grid to provide scheduling and operation management for the distribution network including distributed power sources. Guaranteed.
  • a distribution network fault isolation and recovery method for implementing a distributed distributed power source including fault isolation and recovery of a distribution network, characterized in that -
  • the distribution network fault isolation and recovery method is based on an intelligent distributed feeder automation mode to realize distribution network fault isolation and recovery of a distributed distributed power source;
  • each FA intelligent substation controller is grouped into a queue for continuous monitoring, and the voltage, switch position, fault status of the feeder line are shared between the FA intelligent substation controllers, Information such as the access status of the distributed power source;
  • the feeder switch controller where the fault occurs is judged after the relevant signal is learned, and the switch before and after the fault point performs a "trip" action, thereby automatically cutting off the fault; 1-4) Through the peer-to-peer communication between the FA intelligent substation controllers, other switches in the group get information about which switch has been cut off;
  • each switch will automatically decide whether to perform the "closed” operation according to its position in the feeder, and quickly restore the power supply to the normal interval of the line according to the "recovery process";
  • the "fault start” condition is that the relay protection signal of the outlet circuit breaker and the "opening" status signal are received, and the switch is in the "pressure loss” state, waiting for the first time setting value, ensuring distributed The power is connected to the network.
  • the first time set value described above is 5 seconds.
  • the FA intelligent substation controller starts from the outlet circuit breaker, notifies the switch status and the fault information to the relevant switch, determines the fault position by the controller, and isolates the fault point before and after the switch, and is connected to the distributed power source.
  • the switch transmits the state of the grid point switch to the control unit of the outlet breaker.
  • the peer-to-peer communication described is realized by the communication network of each FA intelligent substation controller and the switch position status message.
  • the fault isolation logic thereof is
  • the recovery process described therein begins simultaneously with the exit breaker and the tie switch; the fault recovery logic is
  • the tie switch will close, and after successful, notify the adjacent switch to the direction of the exit breaker;
  • a switch If a switch successfully trips and receives an adjacent switch to successfully recover the message, it enters the recovery process; there is a disconnected switch around the switch, which is itself a voltage-loss switch and there is no overcurrent, if the surrounding is a loss of voltage but the flow switch Or if there are two overcurrent switches or the switch itself is an end switch that directly connects the load, then the switch will close;
  • the surrounding switches must be notified when each switch is closed to prevent the ring from running.
  • the grid-connected condition is the grid-connected condition of the conventional grid power generation equipment. Compared with the prior art, the advantages of the present invention are -
  • the intelligent distributed feeder automation mode is introduced, which has high intelligence in the troubleshooting and recovery process, and the judgment is rapid and accurate.
  • the logic conditions can be based on the grid.
  • the actual topology is modified and supplemented;
  • the entire control mode is based on existing equipment and is not limited by existing equipment. With the continuous upgrading of smart grid equipment, the control strategy can be continuously adjusted and supplemented, regardless of the specific structure of the hardware;
  • Figure 1 is a block diagram showing the flow of the method of the present invention
  • Figure 2 is a block diagram showing the flow of calculating the load of adjacent feeder segments
  • Figure 3 is a block diagram showing the flow of finding a contact switch
  • Figure 4 is a block diagram showing the flow of the fault start condition
  • Fig. 5 is a schematic diagram showing the positional relationship of switches in a special case. detailed description
  • the present invention provides a distribution network fault isolation and recovery method for implementing a distributed distributed power source, including fault isolation and recovery of a distribution network, and the technical solution of the invention lies in that -
  • the distribution network fault isolation and recovery method is based on intelligent distributed feeder automation mode to realize distribution network fault isolation and recovery of distributed power supply-
  • each FA intelligent substation controller is grouped into a queue for continuous monitoring, and the voltage, switch position, fault status of the feeder line are shared between the FA intelligent substation controllers, Information such as the access status of the distributed power source;
  • each switch will automatically decide whether to immediately “trip” according to its position in the system to cut off the fault, quickly isolate the fault point, or perform a “closed” operation, press " The recovery process "rapidly restores power to the normal section of the line;
  • the "fault start” condition is that the relay protection signal and the "open” status signal of the outlet circuit breaker are received, and the switch is in the "pressure loss” state, waiting for the first time setting value (5 seconds) , to ensure that distributed power is connected to the grid.
  • the FA intelligent substation controller starts from the outlet circuit breaker, transmits the switch state and the fault information backward, and the switch is sequentially isolated.
  • the switch connected to the distributed power source transmits the state of the grid point switch to the exit.
  • the control unit of the circuit breaker After the fault occurs, the FA intelligent substation controller starts from the outlet circuit breaker, transmits the switch state and the fault information backward, and the switch is sequentially isolated.
  • the switch connected to the distributed power source transmits the state of the grid point switch to the exit.
  • the control unit of the circuit breaker is the FA intelligent substation controller.
  • Feeder automation refers to the automation of the feeder line between the substation outlet and the user's electrical equipment.
  • the content can be summarized into two aspects: First, user detection, data measurement and operation optimization under normal conditions; It is fault detection, fault isolation, transfer and recovery power control in the event of an accident.
  • Feeder automation is an important part of distribution network automation. To achieve feeder automation, you need Reasonable distribution network structure, with ring network power supply conditions; The operation mechanism of each ring network switch, load switch and terminal switch in the final stage must have remote operation function; the ring network switch cabinet must have reliable switch operation power supply and A working power supply for FTU (Feeder Terminal Unit) and communication equipment; a reliable communication system that is not affected by the external environment.
  • FTU Field Terminal Unit
  • the load is measured by the current
  • Each switch sets its own rated current according to the daily operating state
  • the load value used in the fault recovery is the load value before the fault, and the power flow calculation value can be used instead in the simulation program.
  • the tie switch and the outlet breaker are the starting points for recovery
  • the calculation of the contact switch is repeated at regular intervals
  • Fault start condition The fault must have a start condition, otherwise the normal switch will be closed and the repair will be treated as a fault. After the fault occurs, starting from the outlet circuit breaker, the switch state and the fault information are transmitted backwards, the switches are sequentially isolated, and the switch connected to the distributed power source transmits the state of the grid-connected switch to the control unit of the outlet circuit breaker;
  • Start condition Receive the protection signal and sub-state of the outlet breaker, and the switch loses pressure, wait for a period of time (5S) to ensure that the distributed power supply is connected to the grid.
  • Fault isolation logic The isolation logic is detailed as follows - If a switch receives a fault message and is in a state of loss of voltage (to prevent the normally functioning switch from being tripped by the fault signal); then the switch is opened and the fault message is directed Pass the next level.
  • the switch If the switch is rejected, it cannot be tripped, recorded as a reject status, and the rejection status is notified to the adjacent switch.
  • the recovery process begins simultaneously with the outlet breaker and the tie breaker.
  • a switch If a switch successfully trips and receives a successful recovery message from the adjacent switch, it enters the recovery process; there is a disconnected switch around the switch (to prevent closed-loop operation after opening and closing), itself is a loss-of-voltage switch and there is no overcurrent, if There are pressure loss around but no flow switch or two overcurrent switches or this switch As an end switch that directly connects the load, the switch will close;
  • switch "rejection" situation analysis If the switch itself is a reject switch, run the fault recovery logic, determine the action that you want to complete, and then pass the reject information and the action you want to complete to the adjacent switch;
  • the fault cannot be changed during the fault handling.
  • the b and c switches remain in the "open" state before the fault, and cannot be closed during the recovery process after the fault. To prevent closing under inspection.
  • the distributed power supply automatically performs "synchronous grid connection" operation.
  • the automatic grid-connected condition is the grid-connected condition of the conventional grid power generation equipment, which is a conventional technical means and will not be described here.
  • the technical solution of the present invention is based on an intelligent distributed feeder automation mode to implement a fault isolation and recovery process of a distribution network including a pervasive distributed power source, the degree of intelligence in the troubleshooting and recovery process is high, and the judgment is rapid and accurate, and logic Conditions can be modified and supplemented according to the actual topology of the grid.
  • the entire control mode is based on existing equipment and is not limited by existing equipment. Upgrades, control strategies can be continuously adjusted and supplemented to provide assurance for the dispatching and operation management of distribution networks that contain distributed power.
  • the invention can be widely used in the fields of scheduling, operation management and fault emergency treatment of smart grids.

Abstract

L'invention porte sur un procédé d'isolation de défaillance de réseau de distribution et de reprise sur défaillance de réseau de distribution réalisant une génération distribuée par pénétration, qui appartient au domaine de la gestion d'exploitation de réseau de distribution. Le procédé est caractérisé par le fait qu'un processus d'isolation de défaillance de réseau de distribution et de reprise sur défaillance d'un réseau de distribution contenant une génération distribuée est réalisé sur la base d'un mode d'automatisation de dispositif d'alimentation distribué intelligent, le degré d'intelligence est élevé dans le processus de compensation de défaillance de réseau de distribution et de reprise sur défaillance de celui-ci, la décision est rapide et précise, les conditions logiques peuvent être modifiées ou complétées selon la structure topologique réelle d'un réseau électrique, le mode de commande global est basé sur le dispositif existant mais n'est pas limité par le dispositif existant, et avec la mise à niveau continuelle d'un dispositif de réseau électrique intelligent, diverses conditions logiques d'action peuvent être modifiées et complétées selon la structure topologique réelle du réseau électrique, ce qui est approprié pour une simulation informatique et une analyse de flux de puissance de défaillance, et fournissant une garantie pour une répartition et une gestion d'exploitation d'un réseau de distribution contenant une génération distribuée par pénétration. Cela peut être largement appliqué aux domaines de répartition, de gestion d'exploitation et de traitement d'urgence de défaillance de réseaux électriques intelligents.
PCT/CN2013/076697 2012-12-10 2013-06-04 Procédé d'isolation de défaillance de réseau de distribution et de reprise sur défaillance de réseau de distribution réalisant une génération distribuée par pénétration WO2014089958A1 (fr)

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Application Number Priority Date Filing Date Title
CN201210529130.5A CN103022994B (zh) 2012-12-10 2012-12-10 一种实现渗透分布式电源的配电网故障隔离和恢复方法
CN201210529130.5 2012-12-10

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US10229577B2 (en) 2017-02-01 2019-03-12 Florida Power & Light Company Proactive power outage alerts management system and methods
CN110165637A (zh) * 2019-03-08 2019-08-23 中国电力科学研究院有限公司 用于逆变型电源接入的线路保护方法、系统、装置

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CN103022994B (zh) * 2012-12-10 2015-05-13 上海市电力公司 一种实现渗透分布式电源的配电网故障隔离和恢复方法
CN104181443B (zh) * 2014-08-25 2016-11-16 上海金智晟东电力科技有限公司 馈线自动化的现场测试方法
US9110805B1 (en) * 2014-10-27 2015-08-18 Quanta Computer Inc. Preventing device power on after unrecoverable error
CN104361451A (zh) * 2014-11-15 2015-02-18 国网河南省电力公司开封供电公司 基于海量数据的配电网控制方法
CN105305365A (zh) * 2015-10-30 2016-02-03 国网福建省电力有限公司 电网继电保护应急管理系统
CN106709158B (zh) * 2016-12-02 2020-02-18 国家电网公司 电网馈线自动化系统的性能提升方法
CN106787216A (zh) * 2017-02-27 2017-05-31 武汉浩宏科技有限公司 一种用于多电源环网结构中的智能分布式fa系统
CN110729715B (zh) * 2018-07-17 2022-08-19 国网甘肃省电力公司电力科学研究院 配电网线路故障恢复方法及装置
CN109995020A (zh) * 2018-11-27 2019-07-09 广东电网有限责任公司 一种支持规则自动生成及人工编辑的配电网故障隔离及复电方法
CN112510657A (zh) * 2020-11-11 2021-03-16 广西电网有限责任公司电力科学研究院 含分布式电源接入的馈线自动化线路故障处理方法及系统
CN112710925A (zh) * 2020-12-22 2021-04-27 三峡大学 基于改进vmd和s变换的高渗透率主动配电网故障测距方法
TWI773372B (zh) * 2021-06-09 2022-08-01 談光雄 微電網系統及預同步判斷方法
CN114423141B (zh) * 2022-01-19 2023-08-04 中国科学院近代物理研究所 一种强流超导加速器的机器保护方法和系统

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US10229577B2 (en) 2017-02-01 2019-03-12 Florida Power & Light Company Proactive power outage alerts management system and methods
CN110165637A (zh) * 2019-03-08 2019-08-23 中国电力科学研究院有限公司 用于逆变型电源接入的线路保护方法、系统、装置
CN110165637B (zh) * 2019-03-08 2022-09-20 中国电力科学研究院有限公司 用于逆变型电源接入的线路保护方法、系统、装置

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