摘要
针对传统的并网逆变器存在的谐波含量高,正弦波失真度大等问题,提出了一种新的交流PI控制器,即准PR控制器,它能在不增加控制器复杂程度的基础上,实现对交流信号的无误差跟踪,有效抑制并网电流中的谐波分量,改善并网电能质量。搭建硬件环境,通过对比准PR调节器与传统PI调节下的单相逆变器波形的谐波含量,验证了该方法的有效性。
Concerning that the problems of traditional single-phase grid-connected inverter such as the high harmonic content and sine wave distortion, a new kind of PI controller which is quasi PR controller is proposed in this paper. It can not increase the controller complexity but achieve no error tracking on ac signal, effectively restrain the grid current harmonic component, improve the grid power quality. Comparing the harmonic content of single-phase inverter under traditional PI controller and quasi PR controller based on hardware environment, experiment results have verified validity of this method.
出处
《自动化技术与应用》
2014年第1期12-15,31,共5页
Techniques of Automation and Applications
关键词
单相逆变器
PR调节器
谐波抑制
并网
single-phase inverter
PR controller
harmonic restrain
grid-connected
