Analysis of a Partial Discharge Defects in GIS Support Insulator
- Resource Type
- Conference
- Authors
- Ding, Ran; Teng, Yun; Zhao, Ke; Ma, Jingtan; Zhuang, Tianxin; Li, Yujie; Xiao, Hanyan
- Source
- 2021 IEEE 2nd China International Youth Conference on Electrical Engineering (CIYCEE) Electrical Engineering (CIYCEE), 2021 IEEE 2nd China International Youth Conference on. :1-6 Dec, 2021
- Subject
- Power, Energy and Industry Applications
Robotics and Control Systems
Transportation
Partial discharges
Uncertainty
Air gaps
Fault location
Inspection
Insulators
Discharges (electric)
Gas-insulated switchgear
partial discharge
ultra-high frequency
partial discharge locating
partial discharge diagnosis
- Language
The support insulator is one of the components with high probability of failure in GIS equipment, and the along-surface flashover and air gap defects are serious threats to the safe operation of GIS equipment. The paper proposes a method of GIS internal defect diagnosis and location based on UHF signal. Combined with the online monitoring system, the paper introduces its application process in the detection and locating of the air gap discharge of the GIS support insulator in operation. The partial discharge type is distinguished by the phase resolved partial discharge pattern recognition, and the locating of partial discharge is based on the time difference method. The disassembly analysis of GIS equipment verifies the effectiveness of the above method used by the GIS online monitoring system and avoids further development of partial discharge leading to unplanned busbar outages or serious accident. The application characteristics of partial discharge technology are analyzed in conjunction with the case study to provide reference for insulation monitoring of GIS equipment.