基于电场逆问题的双差分式D-dot过电压传感器研究  

Research on Dual-differential D-dot Overvoltage Sensor Based on the Inverse Problem of Electric Field

作　　者：汪金刚[1] 赵鹏程[1] 王谦 周茂 黄昊 WANG Jingang;ZHAO Pengcheng;WANG Qian;ZHOU Mao;HUANG Hao(State Key Laboratory of Power Transmission Equipment and System Security(Chongqing University),Shapingba District,Chongqing 400044,China;Chongqing Electric Power Research Institute,Chongqing Electric Power Company,Yubei District,Chongqing 401123,China;State Grid Chongqing Electric Power Company,Yuzhong District,Chongqing 400014,China)

机构地区：[1]输配电装备及系统安全与新技术国家重点试验室(重庆大学),重庆市沙坪坝区400044 [2]国网重庆电力公司电力科学研究院,重庆市渝北区401123 [3]国网重庆电力公司,重庆市渝中区400014

出　　处：《中国电机工程学报》2020年第16期5363-5372,共10页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51677009);重庆市科技计划项目(cstc2017jcyjAX0181)。

摘　　要：通过测量电场获取电力系统遭受的过电压,对于电力系统故障分析、绝缘配合设计以及过电压的特性研究具有指导作用。为此,该文设计一种双差分式D-dot过电压传感器,以实现对过电压信号快速精确地测量。首先,介绍该传感器的基本测量原理;其次,通过仿真对传感器进行仿真论证和参数优化设计;最后,根据仿真结果制作传感器实物,并搭建试验平台对设计的传感器进行稳态性能和暂态性能试验。结果表明:双差分式D-dot过电压传感器具有良好的稳态和暂态特性,相位和幅值误差小,测得的雷电波上升时间的相对误差在±1.65%以内,对雷电波峰值的测量相对误差小于±1.85%。Obtaining the overvoltage of the power system by measuring the electric field has important guiding significance for power system malfunction analysis, insulation coordination design and overvoltage characteristics study. Therefore, in order to achieve faster and more accurate measurement of overvoltage signals, we designed a dualdifferential D-dot overvoltage sensor. First of all, the basic measurement principle of the sensor was introduced. Secondly, we conducted feasibility study and parameter optimization design for the sensor by simulation. Finally, according to the simulation results, the physical model of the sensor was made and the test platform was built to test the steady state performance and transient performance of the designed sensor. The results show that the dual-differential D-dot overvoltage sensor has good steady-state and transient characteristics with small phase and amplitude errors. The relative error of the lightning wave rise time measured by the sensor is within ±1.65%, and the relative error of the measured lightning wave peak is less than ±1.85%.

关 键 词：过电压测量 D-DOT 双差分 电场逆问题 传感器 

分 类 号：TM933[电气工程—电力电子与电力传动]