Photon count technique as a potential tool for insulation micro-defect detection: Principles and primary results

被引：12
作者：
Fan, Xianhao [1 ]
Luo, Hanhua [1 ]
Liang, Fangwei [1 ]
Hu, Jun [1 ]
Liu, Weidong [1 ]
Li, Chuanyang [1 ]
He, Jinliang [1 ]
机构：
[1] Tsinghua Univ, Dept Elect Engn, Beijing 100084, Peoples R China
来源：
IENERGY | 2023年 / 2卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Gas-insulated equipment; epoxy insulation; defect detection; partial discharge (PD); electroluminescence (EL); CHARGE-TRANSPORT; POLYMERS; ELECTROLUMINESCENCE;
D O I：
10.23919/IEN.2023.0036
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
The requirements for the construction of a new power system inevitably pose significant challenges and changes to the operation and maintenance of the power grid. To ensure the safe and stable operation of ultra-high voltage (UHV) transmission equipment, this work reports on the principles and preliminary results of using electroluminescence (EL)-based photon counting (PC) methods for early detection of micro-defects in GIS/GIL insulation spacer. In this study, the impact of voltage, gas pressure, and gas composition on the photon response of insulation is examined. Furthermore, the corresponding relationship between defect status and photon response characteristics is explored, along with the discussion of the EL mechanism and its evolution induced by defects. The research results demonstrate that PC measurement exhibits high sensitivity to variations in millimeter-scale defect size, position, and morphology at lower electric fields before partial discharge (PD) initiation. With this regard, this paper reveals promising prospects for the early detection of micro-defects in UHV transmission equipment using PC measurement-based methods.
引用
收藏
页码：258 / 263
页数：6
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