一种调节表面电荷分布以减轻表面闪络的部分高导电性涂层

2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE) Pub Date : 2022-09-25 DOI:10.1109/ICHVE53725.2022.10014475

Binbin Li, Jie Huang, Shenglong Zhu, Yabin Ma, Shaorui Qin, J. Xue, Zhu Zhang, L. Ding

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引用次数: 0

摘要

高压直流输电解决了大容量电力的远距离输送问题。在直流励磁运行过程中，不可避免地会在绝缘表面积聚大量电荷，对表面绝缘性能造成危害。如何有效地控制表面电荷积累仍然是我们必须面对的挑战。本研究提出了一种局部高导电性涂敷方法来调节间隔片表面电荷分布。得到了HV涂层、GND涂层、MID涂层和$\mathbf{HV}+\mathbf{GND}$涂层四种局部涂层在直流激励后的表面电荷行为。并对这四种涂覆隔离片的直流闪络性能进行了测试。揭示了相应的电荷输运和闪络机理。希望本研究能为直流电力设备的绝缘结构设计提供有价值的参考。

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A partially high conductive coating adjusting surface charge distribution for mitigating surface flashover

High voltage direct current (HVDC) energy transmission has solved the problems of deliverying electric power of large capacity over long distances. During the operation of DC excitation, large amounts of charges inevitabley accumulate on insualtion surface, posing a hazardous effect on surface insulation performance. How to effectively control surface charge accumulation still remains as a chanllenge that we must face. In this study, a partially high conductive coating method for regulating surface charge distribution on spacers is proposed. The surface charge behavior after DC excitation is obtained on four kinds of partial coating, namely HV coating, GND coating, MID coating and $\mathbf{HV}+\mathbf{GND}$ coating. The DC flashover performance on this four kinds of coated spacers is also measured. The corresponding charge transport and flashover mechanism are revealed. It is hoped this research could provide valueable referances for designing insulation structure of DC power equipment.

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2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)

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