摘要
单周控制具有结构简单、控制精度高、响应速度快等优点,三相并网逆变器的单周控制模型,将一个周波分为六个区间,每个区间只有两个开关器件处在高频开关状态下,大大减小了器件的开关频率,降低了并网电流的谐波畸变率,实现了单位功率因数输出。在此基础上提出一种基于单周控制的防"孤岛"效应策略,有效的抑制了"孤岛"效应的产生,最后通过仿真验证了此方法的正确性。
One-cycle control has the merits of simple structure, high precision and quick response. A three phase grid-connected inverter is proposed in this paper, it is based on one-cycle control, and it achieves unity-power-factor for a standard six-switch bridge inverter. During each 60 degree of each line cycle, only two switches are operated in switching frequency. Low switching losses is achieved. The effectiveness of the proposed scheme is demonstrated by simulation results.
出处
《微计算机信息》
2009年第5期290-291,207,共3页
Control & Automation
基金
基金申请人:梁志珊
项目名称:高效节能环保原油混沌脉冲电脱水器产业化关键技术研究
基金颁发部门:国家863计划(2007AA03Z230)
关键词
单周控制
并网逆变器
孤岛效应
One-cycle Control
Grid-Connected Inverter
Islanding
