Influence of Tiny Metal Particles on Charge Accumulation Phenomena of GIS Model Spacer in High-pressure SF6 Gas
Influence of Tiny Metal Particles on Charge Accumulation Phenomena of GIS Model Spacer in High-pressure SF6 Gas
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DOI：
10.1109/tdei.2013.6633722
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发表时间：
2013-10-01
影响因子：
3.1
通讯作者：
Takei, Masafumi
中科院分区：
文献类型：
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作者：
Iwabuchi, Hiroyuki;Matsuoka, Shigeyasu;Takei, Masafumi
在0.5-MPa（绝对压力）下测量了由环氧树脂制成的小型GIS盘形间隔件的电荷密度分布。SF6气体将直流电压施加到间隔物，并且使用静电探针测量表面上的电荷密度。在不打开密封室的情况下进行电压施加和电荷测量，在施加60 kV电压后，间隔物上出现径向电荷图案。在施加电压后，在间隔物上观察到尺寸小于0.1mm的微小金属颗粒。间隔物上的金属颗粒可引起本实验中的径向电荷积累：如果金属颗粒粘附在间隔物上，则金属颗粒附近可发生局部放电，并且负电荷可沿着间隔物的表面前进。
The charge density distribution of the downsized GIS disc spacer made of epoxy resin was measured in 0.5-MPa (abs.) SF6 gas. A dc voltage was applied to the spacer, and the charge density on the surface was measured using an electrostatic probe. Voltage application and charge measurement were conducted in a sealed chamber without opening it. After the voltage application of 60 kV, radial charge patterns appeared on the spacer. Tiny metal particles whose size is smaller than 0.1 mm were observed on the spacer after the voltage application. Metal particles on the spacer may cause the radial charge accumulation in this experiment: if a metal particle adheres on the spacer, partial discharge may occur near the metal particles and negative charges may progress along the surface of the spacer.