Combined application of ultrasonic and ultra high frequency techniques in the partial discharge detection and positioning of gas insulated switchgear. Issue 1 (January 2021)

• Record Type: Journal Article
• Authors: Xiao, Jing; Li, Xin; Tang, Yongming; Hu, Jinghao; Wang, Lirong; Xu, Puming; Yan, Ying; Wu, Shuifeng
• Is Part Of: IOP conference series. Volume 621:Issue 1(2020)
• Publication Date: 2021-01
• Subjects: Earth sciences -- Periodicals; Environmental sciences -- Congresses; Environmental sciences -- Periodicals; 550.5
• DOI: 10.1088/1755-1315/621/1/012002
• Languages: English
• ISSNs: 1755-1307

Abstract

Abstract: Partial discharge live detection of GIS can effectively find internal defects, but it is often interfered by surrounding environmental noise, which affects the correct identification and judgment of defect signals. This paper introduces the application of AE and UHF technique in the live detection of GIS, which successfully recognizes the external interference signal, analyzes the cause of abnormal partial discharge signal based on signal characteristics, and uses the method by calculating time difference to locate the source of the signal. An internal checking on the equipment were conducted based on the test results while the equipment were stopped, and verified the existence of floating fault inside GIS.