200 kV阻容分压式直流电压互感器阻抗匹配  

Impedance matching of 200 kV DC voltage transformer based on resistance-capacitance divider

作　　者：李登云 熊前柱 柴永峰 雷民 莫石 LI Deng-yun;XIONG Qian-zhu;CHAI Yong-feng;LEI Min;MO Shi(Research Institute of Metrology,China Electric Power Research Institute Co.Ltd.,Wuhan 430074,China;School of Electrical and Electronic Engineering,Huazhong University of Science&Technology,Wuhan 430074,China)

机构地区：[1]中国电力科学研究院有限公司计量研究所,武汉430074 [2]华中科技大学电气与电子工程学院,武汉430074

出　　处：《沈阳工业大学学报》2022年第5期496-501,共6页Journal of Shenyang University of Technology

基　　金：国家重点研发计划项目(2017YFF0205701);国家电网有限公司总部科技项目(JL71-17-005).

摘　　要：为了研究200 kV阻容分压式直流电压互感器内部的阻抗匹配情况,分析了阻容分压式直流电压互感器的工作原理,基于实际参数建立了互感器的MATLAB仿真模型.互感器内部阻抗匹配效果不佳,不能完全消除振荡,需增加更有效的阻抗匹配措施.采用低通滤波器作为有效阻抗匹配的措施,并通过对比分析不同滤波器的阻抗匹配效果.结果表明,与RC无源滤波器相比,二阶巴特沃斯滤波器滤波特性更优,性能更稳定,是更可靠、有效的阻抗匹配措施.In order to study the internal impedance matching of 200 kV DC voltage transformer based on resistance-capacitance divider,the working principle of DC voltage transformer based on resistance-capacitance divider was analyzed,and the MATLAB simulation model for the transformer was established in terms of actual parameters.The internal impedance matching effect of transformer was not good,the oscillation could not be completely eliminated,and more effective impedance matching measures are necessary.A low-pass filter was proposed as an effective impedance matching measure,and the impedance matching effect of different filters was analyzed through comparison.The results show that the second-order Butterworth filter has better filtering characteristics and more stable performance,which can be a more reliable and effective impedance matching measure compared with RC passive filters.

关 键 词：电压互感器 阻容分压器 阻抗匹配 电缆传输 MATLAB仿真模型 Butterworth低通滤波器 信号失真 直流电压互感器 

分 类 号：TM451[电气工程—电器]