Battery Charging Equipment in Tidal Power Generation System by Darrieus Turbine

This paper describes a charging equipment to follow maximum efficiency of the water turbine. It charges a battery with electric power by tidal power generation at Kanmon Straits. The generator is counter-rotating three-phase one and is driven by Darrieus turbine in parallel. The generator output is converted to direct current and the battery is charged. The methods of charging are floating charge and charging current control. We confirmed that floating charge of simple equipment charged 2.7 kWh at a large tidal range period. The charging current control was able to follow the maximum efficiency under more than 0.8 m/s current speed.