中文摘要：

研究结果表明，在带电情况下覆冰绝缘子表面冰棱并未完全桥接，在覆冰绝缘子串两端的伞裙之间存在一定的空气间隙。为了研究这种空气间隙对放电发展的影响，提出了冰棒-冰板空气间隙模型。设计了紫外线成像仪CoroCAM IV＋和基于虚拟仪器LabVIEW相结合的电晕测量系统。通过对冰棒-冰板空气间隙电晕放电脉冲的测量，证明该测试系统性能良好，能够满足试验测试要求。同时为下一步深入开展覆冰电极系统内空气间隙电晕放电的机理研究提供了试验平台。

英文摘要：

One of the most evident phenomena found for ice accretion on energized insulators is the frequent presence of air gaps near to HV terminal. In this paper, in order to investigate the influence of air gap existence on discharge development, an icicle to iced-plate model is designed and experimental methods are represented briefly. The measure systems include CoroCAM IV＋ and one current sensor designed as well as one measurement system based on WINDOWS and Lab VIEW platforms. By testing, these systems indicate perfect properties enough to satisfy the further testing requirements for deeply investigating corona discharge and advancing us an overall understanding about flashover developmental processes on ice-covered insulators.