电容分压型电子式电压互感器传感特性研究  

Research on Sensing Properties of Electronic Voltage Transformer Based on Capacitive Voltage Divider

作　　者：曹敏[1,2] 林中爱 林聪[1,2] 杨明[1,2] 刘清蝉[1,2] 李宽[3] 李川[3,4] 

机构地区：[1]云南电网有限责任公司电力科学研究院,昆明650217 [2]中国南方电网公司电能计量重点实验室,昆明650217 [3]昆明理工大学信息工程与自动化学院,昆明650500 [4]昆明理工光智检测科技有限公司,昆明650093

出　　处：《江西科学》2017年第1期136-139,共4页Jiangxi Science

基　　金：国家自然科学基金项目(KKGD201503106);云南电网有限责任公司电力科学研究院项目(2015-000303JL00018)

摘　　要：建立集中和分布参数模型,分析了杂散电容对电容分压型电子式电压互感器的影响,并以10 kV CEVT的基本特性为参数建模,利用MATLAB和MULTISIM仿真比较不同参数和有杂散电容影响下的传感特性。实验表明,二次分压电阻的取值越小,其带宽越大、传变特性越好。通过合理选择R,可以较好地修正CEVT的暂态特性。此外,存有杂散电容会使得二次端输出电压减小。In this paper, The influence of the stray capacitance on the capacitive voltage transformer is analyzed by the lumped and distributed parameter model, l0 kV CEVT is modeled according to the basic characteristics, and sensing characteristics are simulated and compared using MATLAB and MULTISIM and considering the effects of different parameters and the stray capacitance. The simula- tion results show that the better the transmission characteristics and the larger the bandwidth is when the resistance in secondary side becomes smaller. By choosing R reasonably, the transient character- istics of CEVT can be adjusted better. In addition, the output voltage should become smaller owing to the effect of the stray capacitance.

关 键 词：电容分压型电子式电压互感器 集中参数模型 分布参数模型 传感特性 影响量分析 

分 类 号：TM45[电气工程—电器]