摘要
本文介绍了并网逆变用LCL输出滤波器的设计步骤和基于电网电压矢量定向的并网逆变系统直接电流控制方案的基本原理与推导过程,利用数字信号处理器TMS320F2812设计了一台原理样机。仿真和实验结果表明:网侧电流比逆变器侧电流高次谐波得到更好地衰减,并网电流与电网电压保持同相位,系统以单位功率因数向电网馈送电能。
A design procedure for LCL filter used in grid-connected inverter is presented; fundamentals and derivations of the direct current control strategy based on grid voltage vector orientation are described, and a prototype is designed using digital signal proces- sor TMS320F2812. The simulation and experiment results show that the high-order harmonics in the grid side current are attenuated more effetely compared with the inverter side one, at the same time, the grid side current is sinusoidal with the same phase as grid voltage, power is energized to the grid with an unity power factor.
出处
《变频器世界》
2011年第4期52-55,共4页
The World of Inverters
基金
电机系统功率变换器的EMI机理研究与抑制
项目编号:RC2007XK007004
哈尔滨市科技创新人才研究专项资金资助
关键词
可再生能源
分布式发电
并网逆变
Renewable energy Distributed generation Grid-connected inverter
