三相PWM并网逆变器在幅相控制下的启动性能改善  

Improvement of Starting Performance for Three-Phase PWM Grid-Connected Inverter Based on Phase and Amplitude Control

作　　者：李杰[1] 宋文祥[2] 马祎炜[1] 陈国呈[1] 王得利[1] 

机构地区：[1]上海大学上海市电站自动化技术重点实验室,上海200072 [2]上海交通大学电气工程系,上海200030

出　　处：《电工技术学报》2009年第4期152-156,共5页Transactions of China Electrotechnical Society

基　　金：上海市教委重点科研基金(06ZZ03);教育部博士学科点专向科研基金(20060280018)资助项目

摘　　要：阐述了三相PWM并网逆变器幅相控制中的相量调节原理,针对系统启动时并网冲击电流大和动态响应较慢的问题,提出了开启电压预测控制和电流前馈控制两种方法,利用直流母线电压变化率推导出起动时刻理想初始参数和电流前馈调节量,有效地改善了系统在幅相控制下启动并网时刻的动态性能。通过15kW的三相PWM并网逆变器样机的实验结果证实了文中所提控制策略的正确性。In this paper, the vector regulating principle of the phase and amplitude control for three-phase PWM grid-connected inverters is represented. To solve the problem of heavy impact current and slow dynamic current response when the system starts up, the start voltage prediction control and the current feed-forward control are proposed, and the ideal parameter of starting time and the value of feed forward adjustment are calculated by using the rate of the change of DC link voltage. The two methods improve the dynamic performance of the system in the phase and amplitude control. The experimental results carried out on a three-phase PWM grid-connected inverter prove the validity of proposed methods.

关 键 词：三相PWM并网逆变器 幅相控制 开启电压预测控制 电流前馈控制 

分 类 号：TM461[电气工程—电器]