Parallel Control Strategy for Multiple VSGs Based on the Adaptive Virtual Impedance
Many inverters in microgrid employs parallel control mode for virtual synchronous generators(VSG).The difference in line impedance and load variation of each inverter leads to uneven power distri-bution of each VSG and even produces circulation damage to system components.In this paper,an adaptive virtual impedance control strategy for multi-VSG parallel was proposed to realize the dynamic adjustment of virtual impedance and to compensate the deviation caused by the difference of line impedance through the reactive voltage regulation loop,so as to achieve the effect of reasonable equal distribution of VSG output reactive power and reduce the circulation.Matlab/Simulink simulation results verify the effectiveness and feasibility of the control strategy.
virtual impedance control strategymicrogridmulti-VSG paralleladaptive virtual impedancepower allocationvoltage compensation
万方数据
维普
