Verification of Control Method for a Loop Distribution System using Loop Power Flow Controller

To use distribution networks effectively and ensure the smooth introduction of distributed generations, we proposed a loop or mesh structure for distribution systems using a loop power flow controller (LPC) at the opened switch that can connect the adjoining feeder. A LPC offers optimal control for distribution systems from the viewpoints of reducing voltage rise, voltage fluctuation and loss minimum power flow control, and so on, having first ascertained the state of the distribution systems. To adapt to areas that cannot use communication systems, from the viewpoints of power quality for the transition phenomena, we also required distributed control using local voltage information for the LPC control. The purposes of this paper are to show power flow and reactive power control for a LPC, and propose a method of determining control coefficients using the optimal operation pattern of LPC and local voltage information. The distributed control using these control coefficients was verified by a 6.6 kV 100 kVA BTB (back to back) type LPC and distribution system testing facility at CRIEPI