Intelligent management method and system for cascading switching stations of distribution network

Abstract

The invention discloses an intelligent management method and system for cascaded switching stations of a distribution network. The switching stations are all provided with fault handling terminals, each of which is connected to the optical fiber ring network through an Ethernet switch, and each of the fault processing terminals is provided with a communication server, and all of the communication servers Both are connected to the power distribution master station. The invention introduces the idea of ​​line optical fiber differential protection and directional protection into the fault handling of distribution network, and forms an intelligent management system of distribution network cascaded switching stations according to the power supply relationship. The terminal uses the fast communication between the unit networks, only transmits the fault signal, and negotiates independently, which solves the selectivity of the protection action when the feeder is faulty, and realizes fault isolation at one time.

Description

Technical field: [0001] The invention relates to maintenance and management of a distribution network cascade switch station, in particular to an intelligent management method and system for a distribution network cascade switch station. Background technique: [0002] With the development of the national economy and the continuous improvement of people's material and cultural living standards, users have higher and higher requirements for power supply reliability. Power outages not only cause inconvenience to people's lives and bring great economic losses, but also have a great negative impact on society. Relevant studies have shown that every kilowatt-hour of power outage will bring an average economic loss of 40 yuan to users, and the economic loss caused by power outages in my country reaches hundreds of billions of yuan every year. Therefore, the power supply reliability of the distribution network needs to be improved urgently, and solving the fault handling problem of...

AI Technical Summary

Problems solved by technology

This mode is that when a fault occurs, the substation exit switch trips to remove the fault, and then uploads the information to the main station. After the master station judges the fault area, it performs remote closing and restores the power supply in the non-faulty area. There are some problems in this fault handling mode. Some deficiencies were found during operation: the DTU does not have the protection trip function, and after a fault occurs, it leapfrogs to the substation to trip to expand the impact of the accident; the fault treatment is controlled at the master station, and the time for fault isolation and power supply restoration is relatively long, generally 20-30 seconds; communication High dependence, fault isolation and power supply recovery are easily affected by communication links

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