基于激光超声检测技术的GIS盆式绝缘子故障分析

2021 IEEE 4th Advanced Information Management, Communicates, Electronic and Automation Control Conference (IMCEC) Pub Date : 2021-06-18 DOI:10.1109/IMCEC51613.2021.9482147

Wen Wang, Yibin Gao, Gang Yang, Zhumao Lu, Guodong Li, Yuan Ren, Dawei Wang

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引用次数: 0

摘要

GIS设备在电网中应用广泛，其可靠性直接影响电网的安全稳定运行。本文对一起220kV GIS盆式绝缘子击穿故障进行了深入分析。根据故障记录图、SF6气体分解产物等故障特征确定故障气室位置。结合激光超声检测仪和现场崩解检测，对GIS母线槽绝缘子击穿的原因进行了综合分析。确认盆型绝缘子有裂纹是由于法兰两侧螺母拧紧力矩不均匀和法兰间隙受潮所致。电场在裂纹处发生畸变，导致沿表面放电。最后，根据故障发生的原因，提出了该类故障的后续处理措施。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Fault Analysis of GIS Basin Insulator Based on Laser Ultrasonic Detection Technology

GIS equipment is widely used in power network and its reliability directly affects the safe and stable operation of power network. In this paper, a case of breakdown fault of 220kV GIS basin insulator is analyzed deeply. The fault gas chamber position is determined according to the fault recording diagram, SF6 gas decomposition products and other fault characteristics. Combined with laser ultrasonic testing instrument and spot disintegration inspection, the reasons for breakdown of GIS busbar basin insulator are analyzed comprehensively. It is confirmed that the basin insulator has cracks caused by uneven tightening torque of nuts on both sides of flange and damp flange gap. The electric field is distorted at the crack, causing the discharge along the surface. Finally, according to the cause of the fault, the follow-up measures for this kind of fault are put forward.

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2021 IEEE 4th Advanced Information Management, Communicates, Electronic and Automation Control Conference (IMCEC)

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