一种新型非接触式电压测量装置研究  

Research on A New Non-Contact Voltage Measuring Device

作　　者：陈旭 张超 张浩淼 程志强 闫瑜 欧龙 CHEN Xu;ZHANG Chao;ZHANG Hao-miao;CHENG Zhi-qiang;YAN Yu;OU Long(State Grid Ningxia Marketing Service Center(State Grid Ningxia Metrology Center),Yinchuan 750000)

机构地区：[1]国网宁夏营销服务中心(国网宁夏计量中心),银川750000

出　　处：《环境技术》2024年第8期139-144,共6页Environmental Technology

基　　金：国网宁夏营销服务中心群创项目,项目编号:5229YX230003。

摘　　要：为消除配电网中非接触式电压测量面临的耦合电容导致的误差影响,本文设计了一种新型电压测量装置。装置专门设计了导电海绵材质的电压测量探头,确保与导线紧密贴合,建立稳定的耦合电容环境,为精准测量奠定了基础。通过建立串联电容模型,运用单片机程序控制电容分压电路的自动优化切换,将2次测量的电压数值带入模型进行计算,有效消除了耦合电容变量变动带来的影响。北侧电压信号经由高阻放大器、滤波器和移相器进行信号调理,最终传输至精密计量芯片,不仅增强了信号质量,还实现了数据的即时显示,提升了用户体验。样机测试验证了该装置的出色性能,测量误差低至0.5%以下,能够满足现场校验对高精度的要求;该新型非接触式电压测量装置操作便捷和实用性强,为配电网的电压和功率监测提供了强有力的技术支持。In order to mitigate the error caused by coupling capacitance in non-contact voltage measurement of distribution network,a novel voltage measurement device is proposed in this study.The voltage measuring probe is specifically designed with conductive sponge material to ensure a secure connection with the wire and establish a stable coupling capacitance environment,thereby laying the groundwork for accurate measurement.By establishing a series capacitance model and employing a single chip computer program to control automatic optimal switching of capacitor voltage division circuit,the measured voltage values are input into the model for calculation,effectively mitigating the impact of variable changes in coupling capacitance.The voltage signal on the north side is conditioned through high-resistance amplifiers,filters,and phase shifters before being transmitted to the precision metering chip,enhancing signal quality while enabling real-time data display and improving user experience.Prototype testing confirms excellent device performance with a measurement error of less than 0.5 %,meeting high precision requirements for field calibration.This new non-contact voltage measuring device offers convenience in operation and practicality while providing robust technical support for distribution network voltage and power monitoring.

关 键 词：配电网 非接触式电压测量 耦合电容 单片机控制 样机测试 

分 类 号：TM932[电气工程—电力电子与电力传动]