基于电场逆问题的高压输电线电压传感器技术与试验研究.pdf

第42 卷 第21 期 电力系统保护与控制 Vol.42 No.21 2014 年 11 月 1 日 Power System Protection and Control Nov. 1, 2014 基于电场逆问题的高压输电线电压传感器技术与试验研究 高 参，汪金刚，范禹邑，朱丽云 (重庆大学输配电装备及系统安全与新技术国家重点试验室，重庆 400044) 摘要：提出了一种高压电网中电压测量的新方法，通过电场逆问题计算，采用电荷感应原理研制了一种电子式高压输变电设 备的新型电压传感器。对工频电场逆问题进行了推导，给出了电压计算流程并设计了传感器初步模型，并在无线长直输电线 下进行了电场畸变影响误差分析。最后，在搭建的高压试验平台下对所研发的传感器进行了电场畸变影响的误差分析试验和 交流电压测量对比试验。结果表明，在长直导线下的电压传感器受电场畸变影响较小，测得的电压有效值具有较高的精度， 传感器测量电压波形失真度小，相位和幅度误差较小。 关键词：高压输电线；电子式传感器；电场逆问题；非接触 Experiment and research of voltage sensor of high-voltage transmission line based on inverse problem of electric field GAO Can, WANG Jin-gang, FAN Yu-yi, ZHU Li-yun (State Key Laboratory of Transmission Distribution Equipments and Power System Safety and New Technology, Chongqing University, Chongqing 400044, China) Abstract: This paper proposes a new approach of voltage measurement in high voltage (HV) grid. A new electronic voltage sensor used for HV transmission and transformation equipment is manufactured based on charge induction calculated by inverse problem of electric field. Inverse problem of power frequency electric field is deduced, while voltage calculated flow is reported and primary sensor model is designed. The error influenced by electric field distortion is analyzed and validated by the actual experiments. Experimental results show that the effective value of detected voltage is precise and the distortion of voltage shape is small. The proposed sensor is suitable for detecting voltage of HV transmission and transformation equipment and mildly influenced by electric field