弱电网下光伏并网逆变器谐振抑制方法综述OA北大核心CSTPCD

Under the background of"carbon peak and carbon neutrality"goals,the power system has formed a"double-high"(high proportion of renewable energy and high proportion power electronic equipment)development trend,resulting in a weak grid characteristic of the power grid.Real-time changes in grid impedance under weak grid lead to stability issues such as resonant frequency offset of photovoltaic(PV)grid-connected inverters,and multiple resonant peaks in inverter clusters.Aiming at the fact that the latest resonance suppression methods for PV grid-connected inverters in weak grid have not been systematically summarized,this article summarizes the hot spot control methods in the field of PV grid-connected inverter resonance suppression in"double-high"power systems from the perspectives of inverter unit resonance suppression methods and inverter cluster resonance suppression methods under weak grid.The development direction of improving the stability of PV grid-connected inverters is pointed out.