电晕笼中无线电干扰高压侧测量结果的校准方法  

Calibration Method of Radio Interference Measurement Result in High-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》2014年第9期2855-2861,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的重要手段,使用电晕笼高压侧的测量结果计算激发函数时,需要对测量结果进行校准,因此对校准方法进行了研究。首先根据激发函数理论和传输线理论推导了高压侧校准系数的公式,并在几种常用接线方式下对其进行了简化。然后,提出了2种获得校准系数的方法:一种是在校准系数公式的基础上,通过数值计算确定相关参数,进而计算出校准系数;另一种是测量校准曲线,再根据校准曲线计算校准系数。以6×LGJ-720/50导线为例对2种方法进行了对比,计算所得校准系数为1.7 dB,根据试验所得校准系数为2.2 dB,2者相差不大,能够互相验证。最后通过计算分析了导线参数对校准系数的影响,结果表明在我国特高压直流电晕笼中,导线参数对校准系数的影响可以忽略不计。Corona cage is one of the key measures for researching the radio interference （RI） of transmission lines. However, calibration is needed when the measurement result at the high-voltage side is used to calculate the excitation function. Hence we have studied the calibration methods. Firstly, a formula of the calibration factor is developed based on the excitation function theory and the transmission line theory, and some simplifications of the formula are made for different situations. Then, we propose two calibration methods, and one determines the parameters in the calibration factor formula through numerical calculation and then calculates the calibration factor, the other determines the calibration fac- tor based on the measured calibration curves. Taking the 6×LGJ-720/50 conductor as example, its calculated calibration factor is 1.7 dB and the result gained by the calibration curve is 2.2 dB. The two results are close to each other. In addition, the impact of the conductor parameters on the calibration factor is analyzed, and the result indicates that this impact can be ignored in the HVDC corona cage in China.

关 键 词：电晕笼 无线电干扰 输电线路 电磁环境 校准系数 激发函数 电晕电流 

分 类 号：TM835[电气工程—高电压与绝缘技术]