Method and system for realizing fault self-healing

Abstract

The invention discloses a method and system for realizing fault self-healing. The system provided by the invention comprises a main station system, a peer-to-peer communication network and a power distribution automation terminal FTU (feeder terminal unit); the FTU is accessed to the peer-to-peer communication network; the main station system is connected with a CP (communication processor); the CP is accessed to the peer-to-peer network; and the FTU is used for detecting the state of a looped network cabinet circuit. In the method provided by the invention, through the peer-to-peer communication with an adjacent FTU, the FTU detects and judges whether fault information exists between the FTU and the adjacent FTU so as to realize the positioning of a fault; after positioning the fault, the FTU sends a control command to control a switch to act so as to isolate the fault; and finally the FTU performs state confirmation and executes switching-on operation so as to recover the power supply of looped network cabinets at two sides of a fault section.

Description

technical field [0001] The invention relates to the technical field of power system automation, in particular to a fault self-healing method. Background technique [0002] At present, in order to reduce the fault time of the medium-voltage power grid, the feeder automation (FA) has been widely paid attention to. FA refers to the automation of feeder lines between substation outlets and user equipment. It is used for user detection, data measurement, and operation optimization under normal conditions, as well as fault detection, fault isolation, transfer, and restoration of power supply control under accident states. [0003] The conventional FA implementation mode is the centralized control type, which requires a communication channel and a control master station. When a fault occurs, the master station receives the information sent by the feeder terminal unit (Feeder Terminal Unit, FTU), and locates the fault through software calculation based on the information , and auto...

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Problems solved by technology

[0003] The conventional FA implementation mode is the centralized control type, which requires a communication channel and a control master station. When a fault occurs, the master station receives the information sent by the feeder terminal unit (Feeder Terminal Unit, FTU), and locates the fault through software calculation based on the information , and automatically send remote control commands to the switch to achieve the purpose of isolating faults and restoring power supply. However, in this control mode, receiving fault information, locating faults and issuing control commands are all operated by the master station, so , the burden on the master station is heavy, and the speed of troubleshooting is slowed down. At the same time, the FTU uploads information to the master station, and the master station sends control information to the FTU. The information needs to be transmitted back and forth between the master station and the FTU, which leads to The time for fault processing is extended, and fault processing will cause short-term power outages in healthy sections. Due to the prolongation of fault processing time, the power supply recovery time is at the level of minutes. However, for some places that are very sensitive to power supply quality, such as semiconductor integration For circuit manufacturing plants and stadiums with important events, even a minute-level short power outage will cause serious economic losses and confusion

In addition, because in the centralized control mode, the switch or the FTU of the ring network cabinet must communicate with the control master station, and the fault isolation is centrally controlled by the master station by remote control. Therefore, this method requires relatively high reliability of communication. Once the system communicates Failure of the mode will directly lead to the loss of the function of the feeder automation

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