南方电网技术2016，Vol.10Issue(2)：18-23,6.DOI:10.13648/j.cnki.issn1674-0629.2016.02.003
VIENNA整流器网侧电流过零点波形畸变抑制方法
A Method for Inhibiting Grid Side Current Waveform Distortion at Zero-Crossing Point for VIENNA Rectifier
摘要
Abstract
VIENNA three level rectifier is widely used in wind turbine systems,UPS systems,etc. To improve its power quality,the mathmatical model and multi-loop control structure are built under d-q synchronous coordinate system,based on the important requir-ment for grid side currents and rectifier side voltage in unit power factor operation condition,the reason for currents distortion at zero-crossing point by using multi-loop control and conventional carrier-based PWM method under d-q rotating coordinate system is deeply studied To reduce the total harmonic distortion rate of grid side currents,the way to add compensation component to three-phase refer-ence modulation voltage to eliminate the area that disobey the important limiting condition is applied,the currents distortion around ze-ro-crossing point is inhibitted and the power quality is improved. The rectifier model is built in Saber simulation system,the correct-ness of theory analysis is proved by comparing the value of currents total harmonic distortion before and after compensation component is added in carrier-based PWM method.关键词
VIENNA整流器/单位功率因数/重要限制条件/d-q旋转坐标系/基于载波PWM调制方法Key words
VIENNA rectifier/unit power factor/important limiting condition/d-q rotating coordinate system/carrier-based PWM method分类
信息技术与安全科学引用本文复制引用
罗异,刘和平,程章格..VIENNA整流器网侧电流过零点波形畸变抑制方法[J].南方电网技术,2016,10(2):18-23,6.基金项目
输配电装备及系统安全与新技术国家重点实验室自主研究项目（2007DA10512713302）。@@@@Supported by the Independent Research Program of State Key Laboratory＆Distribution Equipment and Power System Safety and New Technology （2007DA10512713302）． （）
