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In recent years, the power conversion capability of grid-connected power supplies using the photovoltaic generation system have been introduced rapidly. The power conditioning system (PCS) of PV generation system operates the reactive and active power flow control in accordance with the line voltage regulation level. The reactive power flow control by using the PCS and/or SVC can effectively decrease the line voltage level, however, the voltage imbalance of high voltage distributed line become the cause that results simultaneously. This paper describes the novel power flow controller which is installed near by the pole transformer, to maintain the voltage level the grid-connected distribution line and the voltage imbalance compensation at the high voltage distribution line. Simulation results using the Matlab/Simulink are demonstrating the effectiveness of the proposed power flow converter system. キーワード:太陽光発電連系,無効電力制御,電圧不平衡

Study on suppressing rising of voltage of distribution system with PV system by power control converter