Distribution network fault positioning method based on net-based matrix type algorithm

Abstract

The invention provides a distribution network fault positioning method based on a net-based matrix type algorithm. The method comprise following steps of S1, defining fault indicators in a power distribution network to be nodes, defining sections at non-power supply ends in sections formed by division of the power distribution network by the fault indicators to be edges connecting the nodes, and according to connection conditions of the nodes, constructing a net-based structure matrix D; S2, acquiring indication information of the fault indicators in the power distribution network, and constructing a fault information matrix G of the indication information about the fault indicators; and S3, according to the net-based structure matrix D and the fault information matrix G, judging fault sections, if fault indicators corresponding to two end nodes of one section give out alarms or do not give out alarms, judging the section to be a non-fault section, and if only one of the fault indicators corresponding to two end nodes of one section gives out alarms, judging the section to be the fault section. Thus, fault positioning is quite precise; inspection time for people is reduced; and cost is reduced.

Description

technical field [0001] The invention relates to the technical field of distribution network fault location, in particular to a distribution network fault location method based on a network-based matrix algorithm. Background technique [0002] At present, there are many researches and developments on distribution network fault location system. Most fault location systems obtain the state of the switch and the current and voltage of the feeder by installing monitoring terminals on the switch and the feeder. Under normal circumstances, the fault location system is mainly used to monitor the state of the switch and the current and voltage of the feeder in real time. In case of a fault, the fault location system analyzes the fault information sent back by the monitoring terminal through the fault location algorithm according to the topological structure of the distribution network, obtains the fault section or point, sends out an alarm, and reports the fault section or point Ge...

AI Technical Summary

Problems solved by technology

At present, most of the monitoring terminals use the matrix algorithm to locate the fault. The circuit breaker, section switch and tie switch on the feeder are regarded as nodes, and according to the connection relationship between the circuit breaker, section switch and tie switch Form a matrix, and realize according to whether there is a fault current in the circuit breaker, section switch and tie switch. In this algorithm, the on-off state, current and voltage of each switch need to be known. This method has low efficiency and is difficult to implement. Too much information required can easily lead to inaccurate positioning

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