Influence of Metal Particles on Surface Charge Accumulation Characteristics of GIL Spacer in SF6/N2 Mixture
Wang Han1, Xue Jianyi1, Chen Junhong1, Deng Junbo1,2, Wan Baoquan2, Zhang Guanjun1
1. State Key Laboratory of Power Equipment and Electrical Insulation Xi’an Jiaotong UniversityXi’an 710049 China;
2. State Key Laboratory of Power Grid Environmental Protection China Electric Power Research Institute Wuhan Branch Wuhan 430074 China
The surface charge distribution of spacer with metal particles attached in 0.5MPa 20%SF6/N2 mixture was measured by an electrostatic probe and calculated with an inverse algorithm, and the influence of applied voltage type and metal particle length were studied. The results show that metal particles can increase the surface charge accumulation and greatly distort the local electric field. Under DC voltage the surface charge distribution can be divided into three different patterns, including the homo-charges by electrode injection, bipolar charges around the metal particles and random charges. However, under lightning impulse voltage, there are just bipolar charges around the metal particles and random charges existing. When the metal particle is longer than 5mm, under DC voltage, the accumulated charge near the metal particles will decrease for the existing of charge injection region, and under lightning impulse voltage, the existing of randomly distributed charge will result in the same phenomenon.
王涵, 薛建议, 陈俊鸿, 邓军波, 万保权, 张冠军. SF6/N2混合气体中金属微粒对GIL盆式绝缘子表面电荷积聚特性的影响[J]. 电工技术学报, 2018, 33(20): 4663-4671.
Wang Han, Xue Jianyi, Chen Junhong, Deng Junbo, Wan Baoquan, Zhang Guanjun. Influence of Metal Particles on Surface Charge Accumulation Characteristics of GIL Spacer in SF6/N2 Mixture. Transactions of China Electrotechnical Society, 2018, 33(20): 4663-4671.
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