Device for detecting partial discharge signal of insulating structure

A technology of discharge signal and detection device, applied in the direction of testing dielectric strength, etc., can solve the problems of unrecognized and unfavorable discharge signal processing and analysis, and achieve the effect of effective capture and separation, reliable data support, and simple circuit structure

Active Publication Date: 2012-07-04
SHANGHAI MOTOR SYST ENERGY SAVING ENG TECH RES CENT +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The high-frequency power supply used in the test uses the IGBT high-power switching device inverter circuit to realize the bipolar pulse square wave. The peak-to-peak output voltage of the inverter circuit is about 6000V, and the partial discharge...

Method used

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  • Device for detecting partial discharge signal of insulating structure
  • Device for detecting partial discharge signal of insulating structure
  • Device for detecting partial discharge signal of insulating structure

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Embodiment Construction

[0020] In order to make the present invention more comprehensible, a preferred embodiment is described in detail below with accompanying drawings.

[0021] like figure 2 As shown, a partial discharge signal detection device with an insulating structure provided by the present invention includes a step-up transformer, a full-bridge rectifier circuit, an H-bridge inverter circuit, an IGBT control circuit, a signal acquisition and processing board, and a computer (including a high-speed acquisition card), the full-bridge rectifier circuit is connected to the secondary side of the step-up transformer, the H-bridge inverter circuit is connected to the output end of the full-bridge rectifier circuit, and the IGBT control circuit is also connected to the output end of the full-bridge rectifier circuit, and the H-bridge The test voltage obtained from the output side of the inverter circuit is applied to both ends of the sample. One input end of the signal acquisition and processing b...

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Abstract

The invention relates to a device for detecting the partial discharge signal of an insulating structure, which is characterized by comprising a booster transformer. A full-bridge rectifying circuit is connected with the secondary side of the booster transformer; the output end of the full-bridge rectifying circuit is connected with an H-bridge inverting circuit and an IGBT (insulated gate bipolar transistor) control circuit in a bridging way; the test voltage obtained through the output side of the H-bridge inverting circuit is applied to two ends of a test sample; two input ends of a signal collecting and processing plate are connected with the output end of the H-bridge inverting circuit and the output end of the IGBT control circuit; and the output end of the signal collecting and processing plate is connected with a computer. The circuits of the device have simple structures and can effectively capture and separate the weak signal so that the weak signal can not be submerged in the peak voltage, and reliable data support is provided for the study of the partial discharge of the insulating structure.

Description

technical field [0001] The invention relates to a partial discharge signal detection device of an electric insulation structure, especially aimed at the discharge phenomenon generated under high-voltage and high-frequency pulses. Background technique [0002] PWM frequency converters have been widely used in motor drive systems. With the continuous promotion of frequency conversion speed regulation motors, a large number of frequency conversion motors have premature insulation failures. Research results at home and abroad show that the partial discharge of the insulation structure under the high-frequency square wave pulse of the frequency converter is the main reason for the premature failure of the insulation. Therefore, effectively extracting the partial discharge signal under the condition of high-frequency continuous pulse will help to analyze the damage mechanism of the insulation structure, evaluate the aging life of the insulation structure, and provide a technical b...

Claims

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Application Information

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IPC IPC(8): G01R31/12
Inventor 冯东升王涛何瑶瑶戎伟康王捷
Owner SHANGHAI MOTOR SYST ENERGY SAVING ENG TECH RES CENT
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