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Partial discharge signal measuring and locating method

A discharge signal and partial discharge signal technology, which is applied in the field of partial discharge signal measurement and positioning, can solve the problems of low anti-interference ability and sensor sensitivity limitation, and achieve the effect of sensitive response, easy quantification, accurate and timely detection of faults

Inactive Publication Date: 2019-04-16
BAODING HUACHUANG ELECTRIC
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Problems solved by technology

[0005] The object of the present invention is to provide a method for measuring and locating partial discharge signals, so as to solve the problem

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  • Partial discharge signal measuring and locating method
  • Partial discharge signal measuring and locating method

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Embodiment Construction

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0021] See Figure 1 to Figure 3 , The present invention provides a technical solution: a partial discharge signal measurement and positioning method, the method includes the following steps:

[0022] Step 1: Connect the equipment to extract the partial discharge signal and the synchronization signal. The specific operation process is: first ground the low voltage end of the detection impedance Z1, Z2, Z3 of the same specification, and shi...

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Abstract

The invention discloses a partial discharge signal measuring and locating method. The method comprises the steps of first, carrying out equipment wiring, and extracting a partial discharge signal anda synchronization signal; second, comparing the waveform, and determining an abnormal pulse signal; third, determining a homologous discharge signal, and if there is a partial discharge pulse signal in two or more phases of three-phase detection data, further observing whether the three-phase discharge pulse is a homologous discharge signal or not according to the waveform phase and chromatogram characteristics; fourth, determining the phase; and fifth, locating a discharge source, selecting same-phase phase checking holes of other cabinets nearby for partial discharge detection and location after determining the discharge phase, and then determining the location of the discharge source. According to the method, a traditional pulse current method is adopted, the partial discharge signal isextracted from the phase checking hole, the collected discharge information is rich and comprehensive, and the response to sudden change signals is sensitive, it is easy to quantify, and faults are easy to be discovered accurately and timely.

Description

Technical field [0001] The invention relates to the technical field of partial discharge detection of switch cabinets, in particular to a partial discharge signal measurement and positioning method. Background technique [0002] Switchgear is a direct device to supply power to the distribution network or users. It is widely used in power systems. Some insulation defects in the production or operation process are prone to partial discharge, which further causes insulation degradation and brings huge economic losses. Therefore, the partial discharge detection of the switchgear and accurate positioning can detect the hidden danger of insulation in the switchgear in time and effectively improve the stability of the power grid. [0003] The existing partial discharge detection methods of switchgear mainly include: transient ground wave method, ultrasonic method, and UHF method. Among them, the transient ground wave method is more sensitive to poor contact, suspension discharge, and int...

Claims

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Application Information

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IPC IPC(8): G01R31/12
CPCG01R31/1263
Inventor 张宝金杜玉新赵建军杨丽影王晓辉高常海吴彬王兴民张红桥张普李敏宋毅张文阔
Owner BAODING HUACHUANG ELECTRIC
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