Fault detection and positioning system for power line

Abstract

The invention discloses a fault detection and positioning system for a power line. the system is characterized by comprising fault detection terminals, communication terminals and a system master station, wherein the fault detection terminals are mounted on an electric transmission line or a main line outlet and branch line outlets; the communication terminals receive data transmitted by the fault detection terminals; the system master station receives data uploaded by the communication terminals and analyzes a specific position of a fault point; and each fault detection terminal comprises units as follows: an electromagnetic field induction unit, a current and voltage detection unit, a GPS signal acquisition unit, a high-precision clock unit, a power supply unit, a data storage unit, a local communication unit, a status display unit and a main processing unit. The fault detection and positioning system for the power line has the advantages as follows: quick and accurate positioning of fault points of a medium-voltage distribution line and a high-voltage electric transmission line can be realized, the fault detection terminals are simple in structure, low in power consumption and convenient to install, and the difficulty and the cost of engineering construction can be effectively reduced.

Description

technical field [0001] The invention relates to a fault detection and positioning system, in particular to a fault detection and positioning system of a power line, and belongs to the field of power line monitoring. Background technique [0002] At present, the fault indicator technology of medium voltage distribution lines and the traveling wave ranging technology in transmission lines are relatively mature power line fault detection technologies. [0003] The distribution line fault indicator mainly adopts the injection method, the first half-wave method, the fifth / seventh harmonic method, the transient capacitance current amplitude method, etc. Current amplitude method and other methods to detect short-circuit faults. However, these methods can only enable the fault indicator to detect that the fault occurs at the front or back end of the line. Even if the system master station uses multiple fault indicators, it can only judge that the fault occurs after a certain monito...

AI Technical Summary

Problems solved by technology

On the one hand, this method can only locate the fault by measuring the distance between the fault point and the monitoring point, and the distribution line cannot be located by calculating the fault distance through a single memory due to the existence of branches. On the other hand, because it needs to be installed in the substation, and The structure of the device is complex, so the engineering difficulty and cost are very high

[0005] It can be seen that in the prior art, the distribution li

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