电网技术Issue(8)：2143-2150,8.
PWM变流器分段平均模型中的纹波估计方法
A Ripple Estimation Method for Piecewise Averaged Model of PWM Converters
摘要
Abstract
Averaged models of PWM converters are widely used in the research on system stability and control strategy of power grids. However, it may lead to incorrect results of power system transient simulation and analysis while only the average components of state variables are considered and their ripples are neglected. A general method to estimate the ripples in state variables of the piecewise averaged model of PWM converters is proposed and approximate expression for ripples is attained. The influence of ripples on the accuracy of simulations using the piecewise averaged model is analyzed. Simulation results of three-phase PWM AC-DC converter and boost copper show that the proposed ripple estimation method can give accurate approximate expression of actual ripples, thus the accuracy of the piecewise averaged models of PWM converter can be improved remarkably.关键词
PWM变流器/平均模型/电磁暂态/纹波估计Key words
PWM converter/averaged model/electromagnetic transient/ripple estimation分类
信息技术与安全科学引用本文复制引用
许寅,陈颖,陈来军,杨阳..PWM变流器分段平均模型中的纹波估计方法[J].电网技术,2013,(8):2143-2150,8.基金项目
国家863高技术基金项目(2012AA050217)。Project Supported by The National High Technology Research and Development of China 863 Program (2012AA050217) （2012AA050217）
