Development of multi-level cascaded dstatcom for real-time load balancing and power factor correction of three-phase power distribution system

This paper proposes a distribution level static synchronous compensator (DSTATCOM) based on multi-level full H-bridge (FHB) inverter with delta configuration for real-time load balancing and power factor correction of unbalanced loads in three-phase power distribution systems. Use of cascaded FHB inverters for the main circuit of the DSTATCOM are suitable for high-voltage and high-power applications. First, use of the symmetrical components method derives the compensation algorithm of the delta-connected DSTATCOM. The DSTATCOM is built and simulated with the MatLab/SimuLink program for preliminarily verification. Finally, a hardware prototype is constructed for testing. Experimental results verify the function of the proposed DSTATCOM.