Portable Acoustic-Electric Combined System for Partial Discharge Detection in GIS

A portable acoustic-electric detection system for GIS partial discharge is developed. This system integrates both high and low-speed data acquisition devices, and is capable of multichannel joint detection of ultra-high-frequency and high-frequency current as well as ultrasonic signal generated during the GIS partial discharge process. The software of this system is developed based on LabVIEW. It can successively capture, acquire and store the pulse waveform of partial discharge, calculate the phase of discharge pulse and realize time-frequency analysis and amplitude-phase distribution analysis of PD signals at the same time. By calculating the time difference of multi-channel ultra-high-frequency (UHF) signals and of PD ultrasonic signals or the time difference between the two, the system is able to locate the PD source. This system has been applied to on-site partial discharge detection of 220kV and 500kV GIS substations, and the test results have verified the performance of the system.

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Development of GIS Partial Discharge Detection System Based on the New UHF Sensor Combination of Switchgear

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.635-637.666 ◽

2014 ◽

Vol 635-637 ◽

pp. 666-669 ◽

Cited By ~ 1

Author(s):

Bo Chen

Keyword(s):

Power Supply ◽

High Frequency ◽

Detection System ◽

Partial Discharge ◽

Ultra High Frequency ◽

Detection Techniques ◽

Advantages And Disadvantages ◽

Frequency Sensor ◽

Discharge Detection

In order to ensure power supply reliability and reduce a variety of power supply failure, we analyze the development status, advantages and disadvantages of partial discharge detection techniques about the various Gas -insulated Metal-enclosed Swith Gear (GIS). We put forward the application of ultra high frequency (UHF) technology for GIS partial discharge online monitoring technology methods to solve the problems of the difference of the pulse current method of anti-interference ability and ultrasonic sensitivity the problem of low. According to the deficiency of the traditional ultra high frequency sensor, we developed a new window type of ultra high frequency sensor, and compared with conventional in vitro type UHF sensor. Experimental results show that that the window-type UHF sensor sensitivity and anti-jamming capability are superior to conventional high-frequency sensor

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Present Situation and Prospect of Internal Sensors for UHF Detection in GIS

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.738-739.38 ◽

2015 ◽

Vol 738-739 ◽

pp. 38-41

Author(s):

Yu Bing Duan ◽

Hao Zhang ◽

Jun Yong ◽

Bo Yang ◽

Xiao Li Hu ◽

...

Keyword(s):

Performance Indicators ◽

High Frequency ◽

Partial Discharge ◽

Present Situation ◽

Ultra High Frequency ◽

Gas Insulated Switchgear ◽

Discharge Detection

This paper summarizes the application situation of the ultra-high frequency (UHF) method in gas insulated switchgear (GIS) partial discharge detection, as well as the differences between internal and external UHF sensors. The performance indicators of internal sensors are introduced, and five main types of internal sensors are discussed and evaluated. In addition, several problems to be solved are posed for researchers.

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