多逆变器并网系统的谐振抑制方法

Resonance Suppression Method of Multi-inverter Grid-connected System

多逆变器并网系统的谐振会导致电网中谐振频率的信号迅速放大,给电网带来不可忽视的电能质量问题,因此需要对多逆变器并网系统的谐振进行抑制。此处在已检测出谐振频率的前提下,提出了一种基于准谐振控制器的多逆变器并网系统谐振抑制方法,通过抑制逆变器输出谐振频率电流的方法,抑制多逆变器并网系统的谐振。实验结果表明,该方法能够抑制多逆变器并网系统的谐振。

The resonance of the multi-inverter grid-connected system will lead to the rapid amplification of the reso-nance frequency signal in the power grid,which will bring a non-negligible power quality problem to the power grid.So it is necessary to suppress the resonance of the multi-inverter grid-connected system.On the premise that the reso-nance frequency has been detected,a resonance suppression method based on the quasi resonance controller is pro-posed for the multi-inverter grid-connected system.By suppressing the output current of the resonance frequency of the inverter,the resonance of multi-inverter grid-connected system is suppressed.The experimental results show that the proposed method can suppress the resonance of the multi-inverter grid-connected system.