A Distributed Fault Detection Method for Smart Distribution Network

Abstract

The invention discloses a distributed fault detection method for an intelligent power distribution network. The method comprises the following steps that a protective range of each intelligent power distribution terminal is determined; each intelligent power distribution terminal communicates with an adjacent intelligent power distribution terminal in a peer-to-peer manner, and interacts network topology structure information of a position where the intelligent power distribution terminal is located; each intelligent power distribution terminal judges a fault position on the basis of a regional longitudinal comparison protection principle and according to fault information obtained by calculation of the acquired adjacent intelligent power distribution terminal; after a line with the fault position is determined, a switch type corresponding to the line is determined according to a network topology structure, and a corresponding fault isolation strategy is made according to the switch type. The method disclosed by the invention has the beneficial effects that each intelligent power distribution terminal can interact the fault information with the adjacent intelligent power distribution terminal in the peer-to-peer manner according to the current network topology structure, so that a faulty region is accurately and effectively isolated, and the requirements on quickness, flexibility and reliability of fault detection and isolation of the intelligent power distribution network are met.

Description

technical field [0001] The invention belongs to the technical field of intelligent distribution network fault detection, and in particular relates to a distributed fault detection method of an intelligent distribution network. Background technique [0002] The distribution network is responsible for supplying power to various types of users, and the safety and reliability of distribution network operation directly affect the safety and reliability of power supply. The structure of the distribution network is relatively complex, with various wiring forms and many branches. Most of them are distributed in places with relatively concentrated population. The operating conditions are relatively harsh, and there are many failures caused by external human or mechanical reasons. In recent years, with the development and application of distributed generation (DG) technology, the structure and operation mode of distribution network are further complicated, and the probability of failu...

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Problems solved by technology

The structure of this type of scheme is relatively complicated, and it needs to be completed with the help of the power distribution terminal installed at each section switch, the fast communication network and the distribution network automation master station system. Carry out simple fault calculations, the distribution network automation master station system judges the fault location according to the fault information uploaded by each power distribution terminal, and makes a fault isolation strategy and sends it to the corresponding power distribution terminal for execution by means of the communication system

This type of solution is highly dependent on the communication system and the master station system of distribution network automation. Information needs to be exchanged between the power distribution terminal and the master station system of distribution network automation many times, which requires a long delay and also has reliability aspects. The problem

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