SYSTEM INTERCONNECTION OPERATING METHOD FOR HYBRID POWER SUPPLY SYSTEM INVOLVING PHOTOVOLTAIC POWER GENERATION AND WIND POWER GENERATION

摘要

PROBLEM TO BE SOLVED: To increase the utilization factor and availability factor of a hybrid power supply system involving photovoltaic power generation and wind power generation and lengthen the lives of batteries. SOLUTION: When the voltage of a battery 3 is lower than a given value, a change-over switch 8 is opened to isolate a hybrid power supply system. A photovoltaic power generation device 1 interconnects an inverter 4 to a system power supply 6 by maximum power follow-up control, and a wind power generation device 2 is used only for charging the battery 3. When the voltage of the battery 3 exceeds the specified value, the change-over switch 8 is closed to direct-current-link the photovoltaic power generation device 1 and the wind power generation device 2. Thus power discharged from the battery 3 and power generated from the photovoltaic power generation device 1 and the wind power generation device 2 is interconnected with the system power supply 6 by controlling the inverter 4 through a fixed power command.