Influence of electrode structure on breakdown characteristics of trigatron switch
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摘要: 基于600 kV触发管型SF6气体开关，设计了三种具有典型电场分布的电极结构，计算分析了各个场分布特点，在-600 kV/400 ns脉冲电压下对不同电极结构进行了击穿特性实验，分析了场分布对开关击穿特性的影响。实验结果表明:三种结构中平头形电极触发击穿模式与其欠压比相关，触发抖动较小；球头形电极自击穿电压抖动最小，能够稳定工作于长时间触发击穿模式；锥头形电极击穿模式较不稳定，可能与其两个间隙击穿特性较相近有关。Abstract: Three types of electrode structures with typical electric field distribution are designed based on 600 kV SF6 trigatron switch. The breakdown characteristics of each structure are obtained on -600 kV / 400 ns pulse generator. With analyzing electric field uniformity of each structure, it is shown that the trigger breakdown mode of the planar electrode is related to the switch work ratio, and this structure has a small trigger jitter. Spherical electrodes jitter of selfbreakdown voltage is little, and it can stably work under longtime trigger breakdown mode. Conical electrode has a very unstable trigger mode, it is possibly because of is likely to be the close breakdown characteristics of the two gaps.
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Key words:
- trigatron /
- gas switch /
- electrode structures /
- breakdown characteristics
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