液氮温区超导复合绝缘材料沿面放电特性

随着超导输电技术的不断发展，对各种超导设备中使用复合绝缘材料的绝缘特性提出了更高要求。复合绝缘的放电击穿往往发生在固体绝缘材料和液氮2种工作介质的交界面。而在液氮温度下，绝缘材料又有着相对独特的放电特性。针对这种情况，设计了极不均匀沿面电场，研究了3种不同的固体绝缘材料在液氮环境中沿面放电的特性，包括其放电起始电压、放电随电压发展过程、击穿电压等特性，并进一步分析3种材料差异的原因，为实际应用提供了参考。

Characteristics of Surface Discharge on the Interface of Solid Insulation and Liquid Nitrogen in Superconducting Applications

Advances in superconducting transmission technology require better insulation materials. The breakdown in composite insulation system mostly occurs on the interface between solid insulation material and liquid nitrogen. Under liquid nitrogen temperature, insulation material discharge behaviors differ a lot from those in room temperature. An electrode system is designed to generate severe non-uniform electric field on surface of solid dielectrics and liquid Nitrogen. The discharge behavior of three different solid dielectrics are tested and analyzed. The results can be used in real engineering applications.