Flicker transfer for three-phase voltage source converter in distribution network

Flicker transfer is significantly affected by the dynamic impedance of the three-phase voltage source converter (VSC) in the distribution network. A methodology to determine the flicker transfer coefficient in a distribution system with a VSC is proposed. The formula of VSC dynamic impedance in the phase domain is derived based on the linearisation model of the VSC with the inner-loop current control and outer-loop power control as well as the phase-locked loop block taken into consideration.