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Fault detection device and method

A technology of fault detection and display device, applied in the direction of measuring device, measuring electricity, transformer testing, etc., can solve the problems of complex judgment method, heavy workload, manpower, material resources and time consumption, etc., to reduce work intensity, avoid power failure, reduce the effect of elimination

Inactive Publication Date: 2018-03-06
EZHOU POWER SUPPLY COMPANY STATE GRID HUBEI ELECTRIC POWER
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Problems solved by technology

The search and judgment method of this method is complicated, and it needs to solve the branch line by branch, which requires a lot of work and consumes a lot of manpower, material resources and time.

Method used

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  • Fault detection device and method

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no. 2 example

[0089] see Figure 19 , the embodiment of the present invention also provides a fault detection method applied to the fault detection device 100 in the above embodiment. The steps included in it will be described below with reference to the figure.

[0090] Step S101: the data sampling device samples the current collected by the at least one current transformer, and transmits the obtained sampled current to the processor.

[0091] The data acquisition device samples the circuit collected by the current transformer (mainly through amplification and AD conversion), obtains the sampled current, and transmits it to the processor.

[0092] Step S102: The processor compares the sampled current according to a preset fault information table, and sends the comparison result to the display device.

[0093] The processor receives the sampling current transmitted by the data acquisition device, and then compares the current according to the preset fault information table, that is, finds...

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Abstract

The invention relates to a fault detection device and method, and belongs to the technical field of power automation. The device comprises at least one current transformer and an equipment main unit.The equipment main unit comprises a data sampling device, a processor, a display device, and a power module. Each current transformer is connected with the data sampling device, and the data samplingdeice is connected with the processor. The processor is connected with the display device. The power module is connected with the data sampling device, the processor and the display device. Compared with the prior art, the device provided by the invention can accurately judge the type of a multi-point grounding fault of a CT secondary loop, is very convenient and efficient, avoids the power-off and unwinding operations of a conventional method, reduces the labor intensity of a maintainer, and greatly reduces the time of the maintainer in reducing the multi-point grounding fault of the CT secondary loop.

Description

technical field [0001] The invention belongs to the technical field of electric power automation, and in particular relates to a fault detection device and method. Background technique [0002] According to the provisions of "Key Points of Anti-accident Measures for Relay Protection and Safety Automatic Devices of Electric Power System": the secondary circuits of current transformers and voltage transformers must have one and only one point of grounding, but due to construction and other reasons, secondary circuits of transformers often occur A multi-point grounding fault occurs in the secondary circuit, which brings serious harm to the safe operation of the system. [0003] The traditional way of finding and judging CT multi-point grounding faults is to use a power outage to dissect the line and use a shaking meter to judge the insulation status, and judge whether there is a multi-point grounding fault in the secondary circuit of the current transformer. The search and jud...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/02
CPCG01R31/50G01R31/62
Inventor 高晓剑赵阳王云松林小汇谢良德李锦晓宋志涛陈芳林李海涛邱灿
Owner EZHOU POWER SUPPLY COMPANY STATE GRID HUBEI ELECTRIC POWER
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