Intermittent flaw signal recognition method for electrical equipment
A technology for power equipment and signal recognition, which is applied in the direction of testing dielectric strength and using acoustic measurement for testing, which can solve problems such as the uncertainty of signal occurrence time and achieve the effect of improving reliability.
Active Publication Date: 2018-11-30
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY +1
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Problems solved by technology
Due to the uncertainty of the occurrence time of defect signals and the uncertainty of defect characteristics in intermittent defects, it is usually impossible to effectively judge whether the detected signal comes from intermittent defects or external interference
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[0022] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.
[0023] According to a method for identifying intermittent defect signals of electric equipment provided by the present invention, the method includes the following steps:
[0024] Step 1, signal characteristic spectrum analysis;
[0025] Step 2, intermittent analysis;
[0026] Step 3, noise sensor analysis;
[0027] Step 4, pulse localization analysis.
[0028] According to a method for identifying intermittent defect signals of power equipment provided by the present invention, a partial discharge d...
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The invention relates to an intermittent flaw signal recognition method for electrical equipment. The intermittent flaw signal recognition method is characterized by comprising the following steps that a plurality of local discharge sensors are mounted on the electrical equipment, and an electrical equipment local discharge detector is used for receiving local discharge signals generated inside the electrical equipment and detected by the local discharge sensors; a plurality of noise sensors are mounted at the external space of the electrical equipment, and the electrical equipment local discharge detector is used for receiving noise signals transmitted from the external space and detected by the noise sensors; and each local discharge sensor is judged and identified by sequentially usingthe following 1-4 steps of 1, signal feature spectrum analysis, 2, intermittent analysis, 3, noise sensor analysis and 4, pulse positioning analysis. According to the intermittent flaw signal recognition method for the electrical equipment, the source of intermittent signals can be comprehensively judged, the intermittent flaw signals and external interference signals are effectively distinguished, and the reliability of electrical equipment flaw diagnosis is improved.
Description
technical field [0001] The invention relates to a method for identifying intermittent defect signals of electric equipment. Background technique [0002] Main power transformation equipment such as transformers, GIS, and transformers are affected by factors such as power equipment structure, operating status, and external environment, and intermittent defects often occur. Due to the uncertainty of the occurrence time of defect signals and the uncertainty of defect characteristics in intermittent defects, it is usually impossible to effectively judge whether the detected signal comes from intermittent defects or from external interference. Contents of the invention [0003] The object of the present invention is to provide a method for identifying intermittent defect signals of electric equipment, which can effectively distinguish intermittent defect signals and external interference signals, and improve the reliability of electric equipment defect diagnosis. [0004] A me...
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IPC IPC(8): G01R31/12
CPCG01R31/1209
Inventor 马飞越丁培王博朱洪波吴旭涛黎炜刘威峰田禄周秀马波李奇超何宁辉刘世涛倪辉伍弘牛勃李秀广魏莹
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY