With the continuous increase in wind power penetration

the stability of grid-following doubly-fed induction generator (DFIG) wind turbines has become insufficient. Grid-forming DFIG wind turbines

with their outstanding voltage and frequency support capabilities

have become a research hotspot. In the microgrid scenario with multiple grid-forming DFIGs operating in parallel

differences in line impedance make it difficult to achieve uniform reactive power distribution among loads. To address this issue

this paper applies the traditional virtual impedance (VI) algorithm to the microgrid DFIGs. Analytical results demonstrate that the implementation of the VI algorithm improves the precision of reactive power sharing at the expense of reduced voltage control accuracy. To optimize the control performance of the VI algorithm

this paper further proposes a novel algorithm combining virtual impedance and virtual capacitance (VIVC). Compared with the VI algorithm

the proposed VIVC algorithm achieves a remarkable 8.6% improvement in voltage control accuracy while maintaining comparable power sharing precision. Additionally

the impact of the proposed algorithm on system stability and dynamic response performance is analyzed. Finally

the proposed strategy and the analysis process are validated on a hardware-in-the-loop platform.