Research on Unbalance Control Method of Distribution Network Based on Cascaded Single Phase Converter

In order to solve the problem of power quality degradation in power distribution area due to a large number of unbalanced loads, the unbalance control method of power distribution area based on passive devices is introduced. By connecting the unbalanced control device in the low-voltage side of the distribution area, the unbalanced load junction voltage can be monitored in real time, and the negative sequence unbalance can be effectively controlled while the DC load is supplied. The simulation results show that the unbalanced control scheme can effectively improve the symmetry of grid-connected voltage and greatly improve the power quality of distribution area.