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A Partial Discharge Detection System for HVDC Gas Insulated Combined Electrical Apparatus

A combination technology of partial discharge detection and gas insulation, which is applied in the direction of instruments, measuring electronics, measuring devices, etc., can solve the problems of inapplicability, different recurrence mechanism, lack of phase information, etc., and achieve the effect of convenient operation and simple structure

Active Publication Date: 2022-03-11
杭州国洲电力科技有限公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the lack of phase information in DC voltage and the different reoccurrence mechanism of PD under AC voltage and DC voltage, the analysis method of PD under AC voltage is not suitable for the analysis of PD under DC voltage

Method used

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  • A Partial Discharge Detection System for HVDC Gas Insulated Combined Electrical Apparatus
  • A Partial Discharge Detection System for HVDC Gas Insulated Combined Electrical Apparatus
  • A Partial Discharge Detection System for HVDC Gas Insulated Combined Electrical Apparatus

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Embodiment Construction

[0028] refer to Figure 1 to Figure 9 The partial discharge detection system of a high-voltage DC gas-insulated combined electrical appliance shown includes a high-voltage DC voltage generating module 100, a data acquisition module 200, and a host computer module 300. The two ends of the high-voltage DC voltage generating module 100 are respectively insulated from the gas to be measured. The combined electrical appliance is connected to 400, the host computer module 300 has built-in HVDC partial discharge analysis software, and the data acquisition module 200 is connected to the HVDC voltage generation module 100 and the host computer module 300 respectively.

[0029] The high-voltage DC voltage generating module 100 includes a power frequency power supply 110, a high-voltage transformer 120, a current-limiting resistor 130, a high-voltage rectifier 140, and a charging capacitor 150. One end of the power frequency power supply 110 is connected to one end of the primary side of ...

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Abstract

The invention discloses a partial discharge detection system of a high-voltage DC gas-insulated combined electrical appliance, which includes a high-voltage DC voltage generation module, a data acquisition module and a host computer module. The high-voltage DC voltage generation module generates a high-voltage DC voltage and applies it to a gas-insulated combined electrical appliance to be tested. , the data acquisition module collects the high-voltage DC voltage signal generated by the high-voltage DC voltage generation module and the partial discharge signal generated by the gas-insulated combination device to be tested under the high-voltage DC voltage, and sends the collected signal to the host computer module, and the host computer module passes through The built-in high-voltage DC partial discharge analysis software analyzes the partial discharge characteristics; the whole system truly simulates the operating environment of the high-voltage DC gas-insulated combined electrical appliance to be tested, and detects partial discharge caused by insulation defects. The structure is simple and the operation is convenient. By detecting the partial discharge current pulse signal, Calculate the apparent discharge volume, determine the partial discharge risk factor, and realize the classification of insulation defects.

Description

technical field [0001] The invention relates to a partial discharge detection system of a high-voltage DC gas-insulated combined electric appliance. Background technique [0002] Gas-insulated combined electrical appliances have the advantages of high reliability, small footprint and small maintenance workload, and are one of the important electrical equipment in high-voltage direct current projects. During the production, transportation, installation and operation of gas-insulated combined electrical appliances, insulation defects such as high-voltage conductor protrusions, grounding shell protrusions, metal particles on the surface of the insulator, bubbles in the insulator, cracks in the insulator, free metal particles and suspended electrodes are generated; When the insulation combined electrical appliances operate at the rated voltage, partial discharges will be generated at the insulation defects, which will cause continuous deterioration of the insulation system and e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/12
CPCG01R31/1254
Inventor 王国明沈佳华刘德茂
Owner 杭州国洲电力科技有限公司
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