摘要：Active rectifiers are widely employed in three-phase electric drive or renewable energy resource
systems because of the bidirectional power flow and the power factor correction. This paper
proposes a systematic method to determine the parameters for the PI current controllers in
active rectifier systems using LCL filter under unbalanced grid faults. The parameters of PI
regulators are designed in frequency domain and taking into account the full model of the LCL
filter as well as the time delay in control system, which improves the system stability and
reliability. The simulation results in MATLAB and hardware-in-the-loop experimental
simulation using the HIL 402 device of Typhoon validate the robust and capability of active
rectifier in stabilizing the system under different non-ideal conditions of grid voltage.
关键词：Active filters; current controllers; LCL filters; unbalanced grid voltage.
