户外干式空心电抗器表面树枝状放电试验研究

Test of Tree Discharge on Surface of Dry-type Air-core Reactors

针对户外干式空心电抗器表面树枝状放电现象，进行包封绝缘材料电击穿特性试验、电抗器模型表面放电试验、绝缘结构电场数值计算、电抗器表面放电检测与防护的试验研究。分析并提出环氧树脂与玻璃纤维复合材料的电击穿机理、电抗器表面树枝状放电机理、表面放电检测方法及评价指标体系，以及表面放电防护措施。

Analysis on tree discharge on the surface of dry-type air-core reactors is made through a series of characteristic tests on breakdown of epoxy resin compound insulation, surface discharge test on reactor model, electric field calculation Of insulation structure and study on monitoring and prevention of surface discharge on reactors. The paper presents the breakdown mechanism and characteristics of epoxy resin compound and glass fiber and the mechanism and preventive measures of tree discharge on dry--type reactor surface.