Method and apparatus for monitoring and positioning fault in power distribution network

Abstract

Embodiments of the present invention provide a method and an apparatus for monitoring and positioning faults in a power distribution network. The method mainly comprises steps that a power distribution line online monitoring unit distributed on a branch of a power distribution line determines a short circuit fault of the power distribution line according to the detected load current changes of the power distribution line, transmits the short circuit fault information of the power distribution line to a power distribution single-phase grounding comprehensive protection apparatus and a fault information processing apparatus; and the fault information processing apparatus, based on preset determination information, performs fusion processing on the short circuit fault information sent by the power distribution line online monitoring unit, and acquiring fault position information of the short circuit fault information. According to the embodiments of the invention, multiple power distribution faults such as short circuits, open circuits, single-phase grounding can be accurately detected; faults in the power distribution network are comprehensively solved; accidents are not enlarged; the equipment is protected; risks that people get electric shocks are reduced; and the selection of a fault line and the positioning of a fault point can be realized rapidly and accurately.

Description

technical field [0001] The invention relates to the technical field of distribution networks, in particular to a method and device for monitoring and locating distribution network faults. Background technique [0002] The power system is the basic industry of the national economy. With the development of the economy, the scale of the power system continues to expand, and people's requirements for power supply services and power quality are getting higher and higher. For this reason, my country has put forward the overall goal of building a smart grid. The smart grid is composed of a smart transmission network and a smart distribution network. One of the core contents is to make the distribution network have higher power supply reliability, have a self-healing (reconfiguration) function, and minimize the impact of power supply failures on users. [0003] According to statistics, more than 95% of power outages suffered by power users are caused by power distribution systems, a...

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Problems solved by technology

[0005] At present, the operating environment of the distribution network is complex, which brings difficulties to the line inspection work after the equipment failure occurs

At present, manual line inspection is used to find faults when faults occur. It takes at least several hours to find and eliminate faults each time. The level of automation is not high, which will consume a lot of human resources and cannot meet the growing needs of distribution line operation.

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