Method for locating single phase ground fault locating system

Abstract

The invention discloses a method for locating a single phase ground fault locating system, for real-time detecting current signals, rapidly detecting and locating the faults,,capturing overhead line errors and increasing wire selection accuracy of the single phase ground faults. The method is realized by the following technical scheme: the method for locating the single phase ground fault locating system comprises the following steps of: selecting wires, selecting testing circuits by an arc suppression coil control module, sending notice messages to a main station via a communication interface; distributing fault judging instructions, after the main station receiving the notice messages, broadcasting the fault judging instructions to an overhead line error alarm of the testing circuit; monitoring; reporting the faults; judging fault points, the main station judging the fault points according to fault report information; and alarming, the main station alarming and notifying the fault point information to maintainers.

Description

technical field [0001] The invention relates to a positioning method, in particular to a positioning method for a single-phase ground fault positioning system. technical background [0002] With the rapid development of the national economy, the load of power lines is increasing, the radius of power supply is also increasing, and the number of branch lines is also increasing; the urban distribution network is gradually transformed from the trunk-diffused type to the trunk, ring network, and double-ring network. Network, contact, open-loop and other operation modes, urban overhead lines are gradually replaced by power supply cables. [0003] The line structure is becoming more and more complicated. Once a fault occurs, it is very difficult to find the specific fault point. It can take a few hours or more than ten hours, which not only affects the reliability of power supply, but also brings great losses to people's production and life. inconvenient. [0004] Among various t...

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Problems solved by technology

[0003] The line structure is becoming more and more complicated. Once a fault occurs, it is very difficult to find the specific fault point. It can take a few hours or more than ten hours, which not only affects the reliability of power supply, but also brings great losses to people's production and life. inconvenient

[0004] Among various types of overhead line faults, the single-phase ground fault of the central point ungrounded system is the most difficult type to detect and judge among all fault types; due to the special operation mode, when a single-phase ground occurs, the phase current will not change suddenly, It has brought a series of problems in fault judgment to fault indicators that are good at single-phase fault feature detection; The company urgently needs to solve major technical problems in production safety

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