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Inference signal prevention method in converter transformer partial discharge detection experiment

A technology for partial discharge detection and converter transformers, applied in the direction of testing dielectric strength, etc., can solve problems such as no solution yet, unable to effectively suppress interference signals, etc., to achieve the effect of improving accuracy and reliability, and suppressing interference signals

Active Publication Date: 2014-08-27
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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Problems solved by technology

For complex on-site interference signals, various methods have certain limitations, and a single method cannot effectively suppress on-site interference signals, and no effective solution has been proposed so far

Method used

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  • Inference signal prevention method in converter transformer partial discharge detection experiment
  • Inference signal prevention method in converter transformer partial discharge detection experiment

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Embodiment Construction

[0015] The invention proposes a method for anti-interference signal in the partial discharge detection experiment of the converter transformer. Before the partial discharge test of the converter transformer, the conduction interference signal on the ground wire in the experimental plant and the electromagnetic interference signal in the space may be relatively large, which will affect the Subsequent partial discharge experiments of converter transformers have serious impacts; in addition, during the partial discharge test of converter transformers, when a higher voltage is applied to the converter transformer, there may be some suspended objects or some metal spikes near the converter transformer. , these suspensions and metal spikes may produce suspension discharge and corona discharge under the action of high voltage, these suspension discharge and corona discharge will have a greater impact on the partial discharge experiment of the converter transformer, in addition, the exp...

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Abstract

The invention discloses an inference signal prevention method in a converter transformer partial discharge detection experiment, and particularly provides a technology of restraining on-site interference signals by means of a two-stage anti-interference method and then ensuring accuracy and reliability of converter transformer partial discharge detection, wherein the method belongs to the technical field of converter transformer detection. The method includes the steps of restraining the interference signals in a converter transformer experimental workshop through the two-stage anti-interference technology, converting data of the detected interference signals into an atlas, conducing mode recognition on the interference signals, determining the types of the interference signals, on one hand, selectively conducting denoising through software, and on the other hand, looking for an interference source through the positioning technology and processing the interference source on site. By means of the method, the interference signals in the converter transformer experimental workshop can be effectively restrained, and reliability and accuracy of converter transformer partial discharge detection can be improved.

Description

technical field [0001] The invention belongs to the technical field of converter transformer detection, in particular to a method for anti-interference signal in a converter transformer partial discharge detection experiment. Specifically, it is a technology that uses a two-stage anti-interference method to suppress on-site interference signals to ensure the accuracy and reliability of partial discharge detection of converter transformers. Background technique [0002] The construction of a DC transmission network is inseparable from the support of DC electrical equipment. The converter transformer is a vital equipment in the DC transmission system, and it is also the core equipment connecting the converter stations and inverter stations at both ends of the AC and DC transmission systems. The running state directly affects the security and stability of the system. Based on a large amount of data statistics, the insulation of converter transformers is the main factor affecti...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
Inventor 齐波季洪鑫李成榕赵林杰孙夏青
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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