非接触式交流电压探头设计与电压测量方法  

Non-Contact AC Voltage Probe Design and Voltage Measuring Method

作　　者：李嘉贤 刘灏 付宇 毕天姝 LI Jiaxian;LIU Hao;FU Yu;BI Tianshu(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China;Electric Power Research Institute of Guizhou Power Grid Co.,Ltd.,Guiyang 550002,China)

机构地区：[1]新能源电力系统全国重点实验室(华北电力大学),北京102206 [2]贵州电网有限责任公司电力科学研究院,贵阳550002

出　　处：《南方电网技术》2023年第11期120-129,共10页Southern Power System Technology

基　　金：国家自然科学基金资助项目(52377098)。

摘　　要：实时、准确的电压量测数据是构建透明电网的基础,非接触式测量技术具备安全、便捷、成本低的优点,成为了广泛布点的现实基础。设计了基于电容耦合原理的柔性电压探头,分析了探头接入采样电路后的分压情况,提出了利用双探头差异输出逆向求解待测电压的方法。仿真与实验结果表明,所提方法能够在不破坏导线绝缘层的情况下实现电压测量。在实验室环境中,稳态工频电压幅值测量误差小于2%,相角测量误差小于0.2°。Real-time and accurate voltage measurement data is the basis for constructing a transparent power grid.The non-contact measurement technology has the advantages of safety,convenience and low cost,and has become a realistic basis for widespread deployment.A flexible voltage probe based on the principle of capacitive coupling is designed in this paper,and the sampling circuit’s impact on the probe voltage division is analyzed,and a method using 2 probes to figure out the wire voltage to be measured utilizing the different output is proposed.The simulation and experimental results show that the proposed method can measure the wire voltage without damaging the insulation sheath.In laboratory environment,the amplitude measurement error of steady power frequency voltage is less than 2%,and the phase measurement error is less than 0.2°.

关 键 词：非接触式电压传感 电容式电压探头 绝缘导线电压测量 同步相量测量 

分 类 号：TM933.2[电气工程—电力电子与电力传动]