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Electrification detection device of transformer

A live detection and transformer technology, applied in measuring devices, instruments, measuring electricity, etc., can solve the problems of partial discharge information detection and positioning of transformers, and achieve the effects of compact structure, strong reliability and improved work efficiency.

Inactive Publication Date: 2017-03-08
ELECTRIC POWER SCI RES INST OF STATE GRID XINJIANG ELECTRIC POWER +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention provides a live detection device for transformers, which overcomes the deficiencies of the prior art and can effectively solve the problem in the prior art that partial discharge information generated by transformer defects cannot be detected and located

Method used

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  • Electrification detection device of transformer

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Effect test

Embodiment 1

[0012] Embodiment 1: as attached figure 1 As shown, the transformer live detection device includes a three-phase transformer, an ultra-high frequency sensor, a data acquisition module, a computer processing module and a data storage module, and at least two ultra-high frequency sensors are fixedly installed on the opposite corners of the front of the transformer , at least two ultra-high-frequency sensors are fixedly installed on the opposite corners of the transformer, the ultra-high-frequency sensors are respectively electrically connected to the data acquisition module, the data acquisition module is connected to the computer processing module by communication, the computer processing module and the data storage module communication connection.

[0013] Here, the three-phase transformer is a 110kV transformer or a 220kV transformer; the ultra-high frequency sensor has the characteristics of extracting the electromagnetic wave signal generated by partial discharge in the ult...

Embodiment 2

[0017] Embodiment 2: Placing defects in a normal transformer, such as placing multiple metal protrusions outside the transformer and placing a floating potential inside the transformer, the floating potential can be a suspended copper ring, and the suspended copper ring is neither directly connected to the high voltage end, It is also not connected to the ground. After the defect is placed, the transformer is energized, and then the partial discharge signal of the transformer due to the defect is received by the ultra-high frequency sensor installed on the transformer in the present invention, and the partial discharge signal is sent to the data acquisition module. The data acquisition module collects the partial discharge signal, and sends the collected data to the computer processing module. Finally, the computer processing module calculates and analyzes the data, judges the strength and type of the partial discharge signal in the transformer, and passes The time difference o...

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Abstract

The invention relates to the technical field of local discharge detection of a transformer and provides an electrification detection device of a transformer. The electrification detection device comprises a three-phase transformer, ultrahigh frequency sensors, a data acquisition module and a computer processing module. At least two ultrahigh frequency sensors are fixedly installed on opposite corners of the front face of the transformer. At least two ultrahigh frequency sensors are fixedly installed on opposite corners of the opposite face of the transformer. The ultrahigh frequency sensors are electrically connected with the data acquisition module. The data acquisition module is in communication connection with the computer processing module. The electrification detection device is proper and compact in structure, convenient to use, high in flexibility, and capable of detecting intensity, types and positions of local discharge signals in the transformer, analyzing local discharge features and rules in case of different defects, so a local discharge signal spectrogram database of the transformer is established, effective reference is provided for application of electrification detection technology of the transformer in an electric power system, and working efficiency of workers is improved.

Description

technical field [0001] The invention relates to the technical field of partial discharge detection of transformers, and relates to a live detection device for transformers. Background technique [0002] Large transformers are widely used in the power sector, and their operating conditions are directly related to the safe operation of the power system. In recent years, insulation problems account for a large proportion of large-scale transformer accidents above 110kV in my country, and partial discharge is not only the cause of insulation degradation, but also the precursor and manifestation of insulation degradation. Moreover, due to the complex structure and uneven insulation of large transformers, when internal defects are caused by improper design, excessive local field strength, poor workmanship or external factors, partial discharges will inevitably occur in the transformer and gradually develop. Cause transformer damage, so it must be detected and solved early in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCG01R31/1227
Inventor 张小军王建庄文兵朱章甫
Owner ELECTRIC POWER SCI RES INST OF STATE GRID XINJIANG ELECTRIC POWER
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