摘要
电容式电压互感器(capacitor voltage transformer,CVT)已广泛应用在电力系统中,但由于其结构中含有电容和非线性电感等,无法对谐波进行准确测量。综合考虑CVT制造参数和杂散电容等因素,建立CVT谐波阻抗模型并推导其完整的传递函数,并通过模型仿真结果与实测CVT谐波试验结果的对比,验证了模型的准确性;在此基础上仿真分析了CVT的关键参数对其谐波传递特性的影响。对CVT准确测量谐波和CVT设计、生产制造以及工艺优化提供一定的参考借鉴。
The capacitor voltage transformer（CVT） has been widely used in the power system;However,it is hard to measure correctly the system harmonic with CVT because of its structure containing capacitors and non-linear inductors.This article describes a harmonic impedance model of CVT and derives its complete transfer function,considering the CVT manufacturing parameters and stray capacitance and other factors.The accuracy of the model was verified by comparing the CVT model simulating results and measured results of harmonic,then the impact of key parameters of CVT on its harmonic transfer characteristics was analyzed by simulation.Also,certain reference function is provided for accurate measurement of CVT harmonics,CVT design,manufacturing and process optimization.
出处
《电网技术》
EI
CSCD
北大核心
2014年第11期3153-3159,共7页
Power System Technology
基金
国家电网公司科技项目(kj2012-112):电能质量高级分析关键技术研究及应用~~
关键词
电容式电压互感器
谐波
模型
关键参数
杂散电容
capacitor voltage transformer
harmonic
model
key parameters
stray capacitance
