A new power flow controller using six multilevel cascaded converters for distribution systems

This paper proposes a new power flow controller consisting of six multilevel cascaded converters for stabilizing and regulating the line voltages in distribution networks. Each cascaded converter is composed of series connection of H-bridge converters, and connected between one phase in the sending end and the other phase in receiving end. While each cascaded converter control only reactive power through itself, the active and reactive power flows are controllable. Using multilevel cascaded converter topology, this power flow controller is expected to be applied to more high-voltage and high-power applications and to have fault ride through capabilities. Experimental results are shown to verify the operating principle of the proposed power flow controller and demonstrates the quick and stable power flow control performance.