Tap switch fault detection system and method

A tap-changer and fault detection technology, applied in the direction of digital variable display, etc., can solve the problems of being susceptible to interference from other mechanical vibrations and sound waves from sound waves, equipment insulation and other performance requirements, and achieve complete electromagnetic interference immunity performance, The effect of avoiding light interference and avoiding serious accidents

Inactive Publication Date: 2021-11-19
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +2
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  • Claims
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Problems solved by technology

[0003] In related technologies, the pulse current method or ultrasonic method is mostly used for the detection of partial discharge; however, if the pulse current method is used, it is necessary to connect the conductive rod of the vacuum tube to draw the high-frequency pulse current. Insulati

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  • Tap switch fault detection system and method
  • Tap switch fault detection system and method
  • Tap switch fault detection system and method

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Example Embodiment

[0032] In order to solve the problem of collecting monitoring of the optical information generated during the discharge in order to solve the problem of highlighting performance requirements of the device in the local discharge detection method of the separating switch, collect monitoring To avoid the above problems, the optical detection method is used as a non-power detection method, not electrically signal interference, with complete electromagnetic interference immune properties, has a broad application prospect. A load-bearing switching device is a fully enclosed structure, especially for photothealing methods to monitor the working condition of the loaded tiben switch. A certain amount of fluorescent material is doped in the core of the fluorescent fiber, and has the characteristics of selectively absorb the optical signal of a particular band, and emit a fluorescent signal to the outside. This allows the fluorescent fiber to receive optical signals illuminated from the side...

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Abstract

The invention relates to the technical field of tap switches, in particular to a tap switch fault detection system and method. The system comprises fluorescent fibers arranged on the inner side of a top cover of an oil tank and used for receiving optical signals in a tap switch, a photoelectric conversion module connected with the fluorescent fiber and used for converting an optical signal received by the fluorescent fiber into an electric signal, and a high-frequency oscilloscope connected with the photoelectric conversion module and used for displaying the electric signals converted by the photoelectric conversion module, wherein when the electric signal displayed by the high-frequency oscilloscope is larger than a set value, it is judged that a fault occurs in the tap switch. Optical signals generated by partial discharge are monitored in the mode that the fluorescent fibers are arranged on the inner side of the top cover of the oil tank of the sectional switch, complete electromagnetic interference immune performance is achieved, optical interference is avoided due to the characteristic of a totally-closed structure of the on-load tap-changer, and optical signals in the on-load tap-changer can be accurately detected.

Description

technical field [0001] The invention belongs to the technical field of tap changers, in particular to a tap changer fault detection system and method. Background technique [0002] The on-load tap changer refers to the voltage regulating device used to change the tap connection position of the transformer winding under the excitation or load of the transformer. Switching, thereby changing the number of turns of the winding, and finally realizing the purpose of voltage regulation; when there are insulation defects in the oil chamber of the on-load tap changer, and the vacuum tube deteriorates to a certain extent, pulse discharge phenomenon will occur, and there is an air gap or medium and low field in the insulation structure. There is a suspended metal body in the strong area, and when the vacuum degree of the vacuum tube is insufficient, the insulation strength between the closed contact and the shield is insufficient, which will cause partial discharge, resulting in pulse ...

Claims

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Application Information

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IPC IPC(8): G01R13/02
CPCG01R13/02
Inventor 王同磊马勇许建刚谢天喜陶风波吴鹏陆云才吴益明杨景刚李建生林元棣王胜权
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST
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