基于电场传感器阵列的输电线路电压非接触式测量方法  

Non-contact Voltage Measurement Method of Transmission Line Based on Electric Field Sensor Array

作　　者：冯迪 刘灏[1] 李嘉贤 毕天姝[1] FENG Di;LIU Hao;LI Jiaxian;BI Tianshu(State Key Laboratory of Aternate Electrical Power System with Renewable Energy Sources,North China Electric Power Univer-sity,Beijing 102206,China;State Grid Jibei Electric Power Research Institute,Beijing 100054,China)

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206 [2]国网冀北电力有限公司电力科学研究院,北京100054

出　　处：《高电压技术》2024年第1期292-301,共10页High Voltage Engineering

基　　金：国家重点研发计划(2022YFB4202303)。

摘　　要：电压作为表征线路运行状态的重要参量,实现其灵活准确的测量对保证电力系统稳定运行至关重要。传统的接触式电压测量方法,因电压互感器体积较大、会产生电磁谐振和高频振荡、额外测量需断电安装等问题,对于海量化测量并不便利。相比较而言,非接触式测量不接触导线,更加安全和便捷,将成为未来电压测量的发展方向。文中提出了基于电场传感器阵列的输电线路电压非接触式测量方法,该方法为了解决导线位置信息未知的问题,设计了与导线方向垂直排列的电场传感器阵列;求解了含导线未知信息量的方程组;构建了比例系数矩阵,反推出导线电压瞬时值;分析了电场传感器对测量的影响;最后,进行了10 kV电压等级电压瞬时值仿真验证,结果显示最大测量误差为2.219%。Voltage is an important parameter for characterizing the operating status of power lines,and achieving flexible and accurate voltage measurements is crucial for ensuring the stable operation of the power system.Traditional con-tact-based voltage measurement methods have drawbacks such as large size of voltage transformers,electromagnetic resonance and high-frequency oscillations,and the need for power outage during installation,making it inconvenient for massive measurements.In contrast,non-contact measurement,which does not require direct contact with the conductors,offers improved safety and convenience,and is considered as the future direction for voltage measurement.This paper presents a non-contact voltage measurement method for transmission lines based on an array of electric field sensors.To address the issue of unknown conductor position information,the method employs an electric field sensor array arranged perpendicularly to the direction of the conductors.By solving the equations involving unknown conductor information,a coefficient matrix is constructed to estimate the instantaneous values of conductor voltages.The influence of electric field sensors on the measurement is analyzed.Finally,a simulation verification of instantaneous voltage values at the 10 kV voltage level is conducted,demonstrating a maximum measurement error of 2.219%.

关 键 词：非接触式电压测量 电压瞬时值 模拟电荷法 电场传感器阵列 比例系数矩阵 

分 类 号：TM75[电气工程—电力系统及自动化] TP212[自动化与计算机技术—检测技术与自动化装置]