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

Abstract:

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.

• Periodical: Applied Mechanics and Materials (Volumes 303-306)
• Pages: 555-561
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.303-306.555
• Online since: February 2013
• Authors: Bin Liu, Yue Hu, Qian Chen, Wei Dong Zhang, Ling Yu Cao, Xian Feng Lu
• Keywords: Acoustic-Electric, Detection System, GIS, Partial Discharge (PD), Portable, Virtual Instrument (VI)

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