A method for harvesting energy from one or more internal energy sources of a wind turbine of a wind farm during an off-grid state includes collecting energy from the one or more internal energy sources locally at the wind turbine during the off-grid state....

The system (1) has an electricity generation unit (2) e.g. wind wheel or solar module, and a power supply (4) feeding electrical energy to a charging module (5) i.e. charging cabinet, which is coupled with the power supply. The power supply is connected to...

An instantaneous response component representing the actual amount of power generation by a wind-driven electricity generator (1) is detected, and a charge/discharge control section (14) controls charge and discharge of a storage battery (4) according to v...

When power management processing is started (S101), it is determined whether setting of calculation of a power generation output upper limit target candidate value is automatic or manual (S102). When it is not automatic calculation, the power generation ou...

A power storage apparatus (2) installed with a power generation system (1) using natural energy generation, power of which changes with time, for relieving change of power generation of the power generation system by executing charge and discharge, delays ...