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

Experiment and research of voltage sensor of high-voltage transmission line based on inverse problem of electric field

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。

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 distortion.