Method and device for detecting distributing line faults

Abstract

The invention discloses a method and a device for detecting distribution line faults. A current transformer is sleeved on a distribution line B-phase so as to acquire a line current signal; a signal acquisition end of an electronic controller receives the line current signal from the current transformer; when a normal line current passes through the electronic controller for the first time or a line circuit is of a fault current and reaches the counting times set by the electronic controller, a control instruction output end of the electronic controller transmits corresponding control signals respectively; a GPRS (general packet radio service) communication module receives the control signals from the electronic controller; the line installing position and the information of the line state are transmitted to a cell phone terminal with an appointed receiving cell phone number through a GSM (global system for mobile) global digital mobile communication system, so as to realize the state monitoring for the distribution line by the cell phone terminal. With the adoption of the method and the device, a fault point can be found as early as possible, so as to find out the reason of the fault and further eliminate the fault; and the device and the method are high in detection precision and reliable in performance, and the detecting device is low in installation and maintenance costs under the condition that the safe and reliable operation of a power grid is ensured.

Description

technical field [0001] The invention relates to a power distribution line fault detection technology, in particular to a power distribution line fault detection method and device, which is suitable for a three-phase power distribution system with an AC frequency of 50 Hz and a rated voltage of 10 KV. Background technique [0002] The overhead distribution line is an important part of the power grid of the power supply company, and whether it can operate normally directly affects the safety and reliability of the grid. my country's coastal climate is humid all year round, the air salinity is high, and there are many severe weather such as heavy snowstorms, thunderstorms, and frost and fog. Therefore, the failure rate of distribution lines and distribution equipment in coastal areas is extremely high. At present, in order to solve the above problems, a line fault addresser is usually installed on the transmission and distribution lines (A, B, C), which mainly consists of an in...

AI Technical Summary

Problems solved by technology

[0003] 1. The distribution line covers a large area. When a fault occurs, line inspectors need to check the addressers on the distribution lines at all levels to determine the fault point. The quickness requirements are still not resolved, and the fault cannot be quickly and accurately judged Section, line inspection is time-consuming and difficult, and accidents cannot be dealt with in a timely and effective manner, which may easily cause power grid losses

[0004] 2. The alarm display unit generally uses a mechanical structure to achieve state transition, which is prone to failure after long-term use, such as maintaining the alarm state, etc., so its detection accuracy is greatly affected, and at the same time causes high installation and maintenance costs

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