【作者】 卢秀和； 黄进；

【Author】 Lu xiuhe;Huang jin;Changchun university of technology Institute of electrical and electronic engineering;

【机构】 长春工业大学电气与电子工程学院；

【摘要】 LCL滤波器与传统的L滤波器相比,有着更好的滤波效果,但LCL滤波器同时会产生谐振问题,影响了系统的稳定性。为了抑制这种谐振特性,对无源阻尼法和虚拟电阻法这两种控制策略进行了研究和对比分析,并将虚拟电阻法运用到光伏并网逆变器中,最后通过仿真结果对比表明,虚拟电阻法可以有效地抑制LCL滤波器的谐振峰,并降低谐振频率处输出电流的谐波,使系统的稳定性得到了增强。更多还原

【Abstract】 Compared with traditional L filter, LCL filter has better filtering effect, but the LCL filter can produce resonance problem at the same time and influence the stability of the system,in order to suppress the resonant characteristics, through studying and comparing with these two kinds methods of the passive damping method and virtual resistance method, the virtual resistance method used into photovoltaic grid inverter,lastly by compared with the simulation results,it shows that the method of virtual resistance can effectively inhibit the resonance peak of LCL filter, and reduce the resonant frequency of the output current harmonic, the stability of the system has been enhanced.更多还原