Distributed Unbalanced Power Sharing with Voltage Distortion Suppression for Distribution Network

With the large-scale access of distributed generation in the distribution network, operation control of the distribution network faces new challenges. Unbalanced distortion has emerged as one of the critical power quality problems for the distribution network, which has escalated especially due to the high application of unbalanced loads. This paper first quantitatively analyzes the relationship between the sharing of negative current and sensitive node VUF suppression and proposes a distributed control strategy that can share unbalanced power among VCM and CCM inverters accurately and suppress sensitive node VUF effectively. The strategy does not need to know the line parameters and is robust to load changes. Finally, the proposed method is verified through the simulation results based on MATLAB/Simulink.