基于电压互感器的宽频电压测量方法研究综述  

Review of Research on Wideband Voltage Measurement Methods Based on Voltage Transformer

作　　者：杨鸣[1] 朱豪帅 邹滨阳 司马文霞[1] 冯宇 赵晓林 张宇 Yang Ming;Zhu Haoshuai;Zou Binyang;Sima Wenxia;Feng Yu;Zhao Xiaolin;Zhang Yu(State Key Laboratory of Power Transmission Equipment Technology,Chongqing University,Chongqing,400044,China;State Grid Chongqing Electric Power Research Institute,Chongqing,401121,China;Wuhan Branch of China Electric Power Research Institute,Wuhan,430074,China;China Electric Power Research Institute,Beijing,100192,China;State Grid Hubei Electric Power Research Institute,Wuhan,430071,China)

机构地区：[1]输变电装备技术全国重点实验室(重庆大学),重庆400044 [2]国网重庆市电力公司电力科学研究院,重庆401121 [3]中国电力科学研究院有限公司武汉分院,武汉430074 [4]中国电力科学研究院有限公司,北京100192 [5]国网湖北省电力有限公司电力科学研究院,武汉430071

出　　处：《电工技术学报》2025年第7期2247-2266,共20页Transactions of China Electrotechnical Society

基　　金：国家电网公司总部科技项目(5108-202218280A-2-347-XG)和国家自然科学基金(52337007)资助。

摘　　要：随着高比例的新能源和电力电子设备接入电网,电力系统中会出现具有宽频带、高幅值的宽频电压,对电力系统的安全稳定运行造成严重威胁。电压互感器作为变电站中应用最广泛的电压测量装置,其在测量宽频电压时存在较大误差,无法为宽频振荡相关研究提供准确的电压信息。鉴于此,该文首先介绍了宽频电压传感原理,并将现有宽频电压测量方法分为物理空间直接测量法和数字空间间接测量法;然后,阐述了电压互感器测量特性,并从传感原理、研究进展、适用范围等方面介绍了基于电压互感器的结构改造法和反演补偿法;最后,对两种宽频电压测量方法的优缺点进行对比与总结,并展望了未来电网宽频电压测量方法的研究方向。With a high proportion of new energy and power electronic equipment access to the power grid,the ability of the power grid to regulate voltage is weakened.The wideband voltage with a wide frequency band and high amplitude has appeared in the power system,posing a serious threat to the power system.As the most widely used voltage measuring device in substations,voltage transformers have high precision when measuring power frequency voltage.However,the wideband voltage in the power system is far beyond the effective measuring range of the voltage transformer,voltage transformers have significant errors when measuring the wideband voltage,which cannot provide accurate voltage information for studying propagation,suppression,and tracing of the wideband voltage.Firstly,this paper describes the principle and process of wideband voltage sensing,including the forward voltage sensing problem(primary voltage conversion to secondary voltage)and the inverse voltage sensing problem(secondary voltage conversion to primary voltage).On this basis,the existing wideband voltage measurement methods are divided into the direct measurement methods in physical space and the indirect measurement methods in digital space.Then,after introducing the structure and measurement principle of the voltage transformer,the measurement distortion mechanism of the voltage transformer is analyzed.The distortion of the secondary voltage waveform of the voltage transformer is divided into nonlinear distortion and frequency response distortion,the former is caused by the nonlinear magnetizing characteristics of the core,and the latter is caused by the capacitor effect and eddy current effect.Secondly,according to the measurement principle,the existing wideband voltage measurement methods based on voltage transformer are divided into the structural transformation methods and the inverse compensation methods.Among them,the structural transformation methods expand the measurement frequency band of the voltage transformer by installing capacitors or curren

关 键 词：宽频电压测量 电压互感器 电压传输特性 电压波形重构 

分 类 号：TM451[电气工程—电器]