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Phase synchronization measurement method, device and system for partial discharge of transformer

A technology of partial discharge and phase synchronization, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve problems such as misjudgment of measurement results, and achieve the effect of easy monitoring

Pending Publication Date: 2021-10-01
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY +2
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Problems solved by technology

Once the partial discharge phase synchronization is inaccurate during the test, it will lead to misjudgment of the measurement results

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  • Phase synchronization measurement method, device and system for partial discharge of transformer
  • Phase synchronization measurement method, device and system for partial discharge of transformer
  • Phase synchronization measurement method, device and system for partial discharge of transformer

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Embodiment Construction

[0016] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific implementations described here are only used to explain the present invention, not to limit the present invention.

[0017] The phase synchronous measuring method of transformer partial discharge of the present invention comprises the following steps:

[0018] Step S001, collecting a single-phase voltage signal of partial discharge on the high voltage side of the transformer;

[0019] Step S002, filter and rectify the single-phase voltage signal, remove the interference signal in the single-phase voltage signal, and output the filtered and rectified single-phase voltage signal to the monitoring system;

[0020] Step S003, based on the single-phase digital phase-locking principle o...

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Abstract

The invention discloses a phase synchronization measurement method for partial discharge of a transformer. The method comprises the following steps of S001, collecting a single-phase voltage signal of partial discharge of a high-voltage side of a transformer, S002, filtering and rectifying the single-phase voltage signal, removing an interference signal in the single-phase voltage signal, and outputting the filtered and rectified single-phase voltage signal to a monitoring system, and S003, based on the single-phase digital phase locking principle of a second-order generalized integrator, establishing a mathematical model for the single-phase voltage signal output to the monitoring system, and calculating to obtain a single-phase voltage synchronization signal synchronized with the transformer partial discharge power frequency phase. The invention further provides a phase synchronization measurement device for partial discharge of the transformer. The invention also provides a phase synchronization measurement system for partial discharge of the transformer. According to the characteristics of partial discharge of the transformer, phase synchronization of single-phase voltage signals is realized by adopting a phase synchronization scheme of taking a single-phase phase from a high-voltage side and based on single-phase digital phase locking of a second-order generalized integrator.

Description

technical field [0001] The invention relates to the technical field of power detection, in particular to a method, device and system for phase synchronization measurement of transformer partial discharge. Background technique [0002] Partial discharge is the main cause of power transformer insulation failure. Therefore, effective partial discharge detection should be carried out to detect the insulation defects inside the transformer in time, and to detect the insulation defects inside the transformer in time, so as to eliminate the accident in the "infancy". The judgment of the partial discharge test results is mainly through the analysis of the test amplitude and the spectrum, especially once the partial discharge exceeds the standard in the field test, the spectrum analysis becomes particularly important. Because the field test environment is complex, all kinds of interference signals will cause the amplitude to exceed the standard. According to the analysis rules of th...

Claims

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Application Information

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IPC IPC(8): G01R31/12
CPCG01R31/1227
Inventor 周秀杨鑫朱洪波王博吴旭涛罗艳田天刘威峰马云龙白金李秀广何宁辉刘畅胡博王廷夫董盼田禄马飞越郝金鹏徐玉华魏莹陈磊牛勃倪辉孙尚鹏李泽成伍弘吴波沙伟燕张佩闫振华马波张庆平高博云明轩
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY
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