电容式电压互感器谐波模型建立及测试分析

frequency Model Establishment and Test Analysis of CVT

对电容式电压互感器谐波测试精度所受的影响进行研究,考虑杂散电容、耦合电容对电容式电压互感器的影响,建立电容式电压互感器谐波数学模型,分析一次侧和二次侧的函数关系.对110 kV的电容式电压互感器进行现场谐波测量试验,基于实测数据的对比分析,获得了电容式电压互感器幅频特性曲线和相频特性曲线.

This paper focuses on the influence of CVT harmonic test accuracy,considering the effects of stray capacitance and coupling capacitance,establishes the CVT harmonic mathematical model,analyzes the function relation of primary side and secondary side,the field harmonic measurement test is carried out for a type of 1 1 0 kV CVT,based on the comparison and analysis of measured data,obtains the frequency characteristic curve and phase frequency characteristic curve of CVT.