Intelligent distributed FA (feeder automation) system for multi-source ring network structure

Abstract

The invention discloses an intelligent distributed FA (feeder automation) system for a multi-source ring network structure. The intelligent distributed FA system comprises multiple feeder terminals, a client and a repairing vehicle, wherein each feeder terminal comprises a positioning unit, an isolation unit and a power supply restoration unit, the positioning unit is used for determining fault positions and fault types, and the fault positions comprise circuit positions, bus positions and branch positions; the fault types comprise transient faults and permanent faults; the power supply restoration unit comprises a load pre-judging unit; the repairing vehicle can receive position information of the permanent faults. The system can realize remote processing and automatic operation of the faults, the workload is greatly reduced, and the labor maintenance intensity is reduced. The load pre-judging unit can determine closing of interconnection switches according to the fact whether overload operation of a transfer power supply is caused by closing of the interconnection switches. After the adjacent feeder terminals receive information that corresponding switches refuse movement is received, corresponding local switches can be enabled to be tripped off to isolate fault.

Description

technical field [0001] The invention relates to the field of power distribution automation, in particular to an intelligent distributed FA system used in a multi-power supply ring network structure. Background technique [0002] The power system includes four links: generation, transmission, distribution and consumption. Among them, the distribution network, as the last link of power production and supply, directly faces users. The quality and reliability of power supply felt by the majority of residential users are reflected in the distribution network, so its status is very important. [0003] As an important technical means to improve the management level of distribution network production and operation and improve the reliability of power supply, the distribution network automation system is a new technology developed in recent years. And geographic graphics and other information integration to form a complete automation system; realize the automation and informatizatio...

AI Technical Summary

Problems solved by technology

[0005] A distributed feeder automation loop in the prior art generally uses equipment from the same manufacturer, which does not have the interoperability and replaceability of individual feeder automation equipment, which brings inconvenience to the later operation and maintenance of distributed feeder automation equipment and restricts Large-scale Promotion of Distributed Feeder Automation Technology

On the other hand, in the intelligent distributed FA, when the distribution network feeder terminal detects a fault, it exchanges fault information with the adjacent feeder terminal, and enters the FA waiting period at the same time, waiting for the distribution terminal to collect fault information. According to the collected fault information And analyze its own fault information to determine the fault point. When there is a transient abnormality in the network, there will be a delay in sending fault information, and the fault information may be lost, or it may be received after the FA judgment is completed. The above situation will lead to Failure point judgment error

In addition, as the urban distribution network lines become more and more complex, the demand for new energy access to the distribution network is becoming more and more common, resulting in an increasingly complex topology of the distribution network, making control operations and accident handling more and more difficult. bigger

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