可再生能源2012，Vol.30Issue(5)：10-13,17,5.
基于交替单相PWM控制的三相光伏并网系统
Three-phase PV grid-connected system based on alternating single-phase PWM control
李小燕 1张代润 1李媛 1许扬1
作者信息
- 1. 四川大学 电气信息学院,四川 成都 610065
- 折叠
摘要
Abstract
A novel alternating single-phase PWM control method, which can be applied to multi-string three- phase PV grid-connected inverter, is proposed. In the alternating single-phase PWM method, the inverter has six switching modes in one power frequency period. Only one of the three-phase legs is switching based on PWM control in each switching mode. Therefore, the switching loss of the power devices is reduced effectively. The system efficiency is improved further under the condition that multi -string PV grid-connected construction can improve energy conversion efficiency. Current hysteresis PWM tracking control can easily realize sinusoidal output current of inverter with good tracking performance.United power factor of grid -connected current can be obtained and the system has good stabilization. The current total harmonic distortion (THD) is lower and acceptable. The results of Matlab simulation prove the validity of the control method proposed.关键词
光伏并网/逆变器/滞环PWM控制/开关损耗/多支路Key words
PV grid-connected/ inverter/ hysteresis PWM control/ switching loss/ multi-string
分类
能源科技引用本文复制引用
李小燕,张代润,李媛,许扬..基于交替单相PWM控制的三相光伏并网系统[J].可再生能源,2012,30(5):10-13,17,5.
