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中文摘要：
棒-板间隙击穿电压往往比其它形式间隙低,因此,用棒-板间隙模拟盐雾对输电外绝缘影响的最严重情况具有参考意义。首先设计搭建了人工雾室,然后进行了棒-板间隙盐雾条件下的交直流电压击穿试验和相关的模拟仿真计算分析。结果表明,盐雾及水雾的存在影响间隙击穿电压大小,其改变程度主要受间隙距离影响,且在交直流电压下存在一定差异。间隙距离小于6 cm时,雾的存在使得间隙交流击穿电压降低最高达16.1%,直流击穿电压降低幅度达49.6%;长间隙下雾对击穿电压影响较小,均在4%以内。研究结果可为实际运行中盐雾所引发的高压输电线路空气绝缘击穿等事故的分析与防范措施的制定提供较好地支持。
英文摘要：
Since rod-plane gap generally has lower discharge voltage than the gaps of other forms, using it to simulate the most severe condition of salty mist affecting the external insulation in power transmission systems is meaningful. There- fore, we designed and built an artificial mist chamber to conduct AC/DC breakdown tests on a rod-plane gap under salty mist conditions; we also conducted numerical simulation and analysis of the tests accordingly. The results show that salt fog and mist do have influence on the gap＇s breakdown voltage, and this influence is determined by the gap length mainly, and it slightly differs between AC and DC voltages. For gaps shorter than 6 cm, fog can decrease the AC breakdown vol- tage by up to 16.1% and the DC breakdown voltage by up to 49.6%. Meanwhile, for longer gaps （10 cm）, fog only slightly influences the breakdown voltage, which varies within 4%. The results can be used as references for analyzing air insulation breakdowns in high voltage transmission lines caused by salt mist and formulating according to preventive measures.
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