Fault location device based on disturbance signals

A technology of fault location and disturbance signal, applied in fault location, measurement device, fault detection according to conductor type, etc., can solve the problems of difficult to achieve accurate location, small fault point current, large calculation amount, etc. Fault location time, the effect of improving location success rate and location efficiency

Inactive Publication Date: 2018-11-13
CHUZHOU KERNUM ELECTRIC CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of method has a large amount of calculation, and the current of the fault point is small, so it is difficult to achieve accurate positioning

Method used

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  • Fault location device based on disturbance signals
  • Fault location device based on disturbance signals
  • Fault location device based on disturbance signals

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Embodiment Construction

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0022] refer to Figure 1-4 , a fault location device based on a disturbance signal, including an injection signal generator 1 and a signal tracking detector 2, the injection signal generator 1 includes a primary component, a controller 3 and peripheral circuits, the model of the controller 3 is STM32F407ZGT6, and the primary The components include an isolating switch 4, a fuse 5, a contactor 6, a transformer 7, a thyristor 8, a first current transformer 9 and a second current transformer 10, and the first current transformer 9 is sequentially connected in series with an isolating switch 4 and a fuse 5 , contactor 6, transformer 7, the second current transformer 10 a...

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Abstract

The invention discloses a fault location device based on disturbance signals. The fault location device comprises an injection signal generator and a signal tracking detector, wherein the injection signal generator comprises a primary assembly, a controller and a peripheral circuit; the primary assembly comprises a disconnecting switch, a fuse protector, a contactor, a transformer, a thyristor, afirst current transformer and a second current transformer, and the first current transformer is connected in series with the disconnecting switch, the fuse protector, the contactor, the transformer,the second current transformer and the thyristor; the signal tracking detector comprises a conditioning circuit, a single chip microcomputer, a communication module and a communication terminal. By means of combination of technologies such as fault indication alarm, power disturbance signal injection, rapid disturbance signal sensing, mobile data communication and the like, online rapid and accurate location of a single-phase earth fault is realized, location success rate and location efficiency of the single-phase earth fault are improved, fault location time is shortened, and besides, the fault location device is low in computational load and is more convenient.

Description

technical field [0001] The invention relates to the technical field of fault location, in particular to a fault location device based on a disturbance signal. Background technique [0002] Distribution network single-phase ground fault location technology is a key technology to further improve the power supply reliability of the distribution network, improve the efficiency and quality of line operation and maintenance, and the fault detection in the small current grounding environment usually includes two levels: the first is the fault selection Line, that is to determine which feeder line on the 10kV bus of the substation has single-phase grounding; the second is fault location, that is, to determine the specific location where single-phase grounding occurs. As far as the research status at home and abroad is concerned, the fault line selection is basically solved, and the methods include zero-sequence current method, power direction method, negative sequence current method...

Claims

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Application Information

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IPC IPC(8): G01R31/02G01R31/08
CPCG01R31/086G01R31/50
Inventor 王建国
Owner CHUZHOU KERNUM ELECTRIC CO LTD
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