脉冲电流与工频电流短路分流研究  

Research on short circuit shunt of pulse current and power frequency current

作　　者：李洪阳 孙涌 Li Hongyang;Sun Yong(Beijing Leishan Testing Service Center of Lightning Protection Facilities,Beijing,102299)

机构地区：[1]北京市雷闪防雷设施检测服务中心,北京102299

出　　处：《电子测试》2021年第19期102-104,共3页Electronic Test

摘　　要：针对脉冲电流与工频电流的路径与分流问题,使用四个罗氏线圈同时采集四通道电流。通过采集脉冲与工频电流的路径与电流值,两种频率电流分流趋势基本一致,但由于高频下趋肤效应产生了细微的变化。通过趋肤效应穿透深度计算可得出不同频率下最佳的横截面积与导体规格,10kHz下约占测试铜排横截面积的约82%。受高频影响线路分流中会有一定的偏差。通过研究脉冲电流短路下的节点分流路径问题,了解到输入和输出端连接在正中和较正中间的位置中能更平均的起到分流的作用。在工程建设,接地系统与设备制造中给出设计建议。Aiming at the problem of path and shunt of pulse current and power frequency current,four Rogowski coils are used to collect four channels of current at the same time.By collecting the path and current value of pulse and power frequency current,the current splitting trend of the two frequencies is basically the same,but the skin effect at high frequency has a slight change.By calculating the penetration depth of skin effect,the best cross-sectional area and conductor size at different frequencies can be obtained,which accounts for about 82%of the test copper bar cross-sectional area at 10kHz.Affected by high frequency,there will be a certain deviation in line shunt.By studying the node shunt path problem under pulse current short circuit,it is found that the input and output terminals connected in the middle and middle position can play a more average role in shunt.Design suggestions are given in engineering construction,grounding system and equipment manufacturing.

关 键 词：脉冲 工频 分流 趋肤效应 

分 类 号：TM862[电气工程—高电压与绝缘技术]