Simulation of LLCL filter based on active damping weighted current control strategy

Grid-connected inverters is the core component of distributed generation system, and filter inverters. When inverter works, can effectively suppress high-frequency harmonics in output current side, so as to ensure stability power grid improve working effect whole connected system. The a high order underdamped LLCL Filter also has resonance peak. In this paper, weighted method based on active damping used. method, side are with reasonable proportion feedback quantity, outer loop, LC series branch inner loop. system reduced first theoretically, which makes up for under problem suppresses peak Through simulation experiment, feasibility verified.