SYSTEM FOR IMPROVING POWER FACTOR OF DISPERSED GENERATION GRID-CONNECTED INVERTER

摘要

A system for improving power factor of a dispersed generation grid-connected inverter is provided to reduce THD(Total Harmonic Distortion) of an output current by regularly maintaining output power factor of an inverter. A dispersed power detecting part(101) detects an output of a dispersed power. A grid power measuring part(102) measures a phase and a frequency of a grid power. A phase control part(103) and a frequency control part(104) perform synchronization with the grid power. An inverter converts a DC power of the dispersed power into an AC power according to a control of an inverter control part(105). An output filter(106) supplies the AC power to a grid(107). A power factor controller(108) calculates a reactive power and an active power in order to control a power factor of the output power. An active power generating part(109) and a reactive power generating part(110) output the active power and the reactive power to the inverter control part.