基于电容电流的高准确度CVT谐波测试系统研制及运用  

Research and Application of High Accurate Harmonic Measurement System Based on Capacitive Current Testing of CVT

作　　者：王昕 刘清蝉 曹敏 赵艳峰 沈鑫 林聪 

机构地区：[1]云南电力试验研究院(集团)有限公司电力研究院,昆明650217 [2]南方电网公司电能计量重点实验室,昆明650217

出　　处：《电子器件》2014年第6期1221-1227,共7页Chinese Journal of Electron Devices

基　　金：云南电网公司科技项目(云电生〔2011〕244号)

摘　　要：长期以来电容式电压互感器(CVT)因其频率特性影响,无法直接开展准确的谐波测量,成为公认的一大技术难题,以此为出发点,设计并研制了基于电容电流与加Blackman-Harris窗和相位差校正的谐波分析算法相结合的CVT谐波测试系统,通过与传统谐波测试方法的测试结果以及电网实际谐波的对比验证了本系统设计的正确性和有效性,并且将其应用到了云南电网电压谐波的测试中,结果表明,本系统完全满足电压谐波测试仪的要求。For a long time,Capacitor Voltage Transformer（ CVT） can not be made directly the accurate harmonic measurement because of the influence of its frequency characteristic,which is an accepted difficult problem. In order to solve the problem,a voltage harmonic measurement system based on capacitive current testing method was designed,which combined with Blackman-Harris window and Phase difference correction method. And correctness and accurateness of the measurement system was confirmed in practical test and comparison. What＇s more,the system is used in Yunnan power grid for voltage harmonic measuring. The results show that the system fully meets the requirements of voltage harmonics measurement.

关 键 词：CVT 电容电流 BLACKMAN-HARRIS窗 相位差校正 电压谐波 测试系统 

分 类 号：TM935[电气工程—电力电子与电力传动]