电晕笼中无线电干扰低压侧测量结果的校准方法研究  

Research on the Calibration Method of Radio Interference Measurement Result at the Low-voltage Side of Corona Cage

作　　者：王文倬[1] 郭剑[2] 张波[1] 何金良[1] 

机构地区：[1]清华大学电机工程与应用电子技术系,北京100084 [2]中国电力科学研究院,北京100192

出　　处：《高电压技术》2015年第3期1042-1048,共7页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2011CB209402-4);国家自然科学基金(51237004)~~

摘　　要：电晕笼是研究输电线路无线电干扰时的重要测量工具。由测量结果计算激发函数时,需要对测量结果进行校准,为了研究低压侧测量结果的校准方法,设计了两种方法获取校准系数,第1种是以高频电源作为电流注入源获取校准系数的试验方法,第2种是通过理论分析,建立电晕笼的分布参数等效电路,计算校准系数。结果表明:以6×LGJ-720/50导线为例,试验得到的校准系数为0.03,计算得到的为0.033,两者仅相差10%,这表明所提出的校准方法是可行的。还分析了导线参数对校准系数的影响,得出在特高压直流电晕笼中,特高压直流线路常用导线的校准系数相差不超过7%。Corona cage is an important measurement tool which is well used in the research of the electromagnetic environment of transmission lines. Since there is a need for calibration when the measurement results are used to calculate the excitation function, we proposed two calibration methods, and studied the calibration method of the measurement result. The first one is an experiment method which uses the high frequency source as a current source. The second method is a calculating method which is based on the theoretical analysis. A distributed parameter equivalent circuit is established to calculate the calibration factor. Bundled conductors of 6×LGJ-720/50 are used in the comparison of the experiment method and calculation method. The experimental result of calibration factor is 0.03 and the calculation result is 0.033, showing that the error of these two methods is only 10%. The comparison result indicates that the methods proposed in this paper are feasible. Finally, the impact of the conductor parameters on the calibration factor is analyzed. The result indicates that the calibration factor errors of different conductors used in HVDC transmission lines are no more than 7%.

关 键 词：电晕笼 无线电干扰 特高压 校准方法 校准系数 激发函数 电晕电流 

分 类 号：TN972[电子电信—信号与信息处理]