Method and apparatus for storing and depleting energy

摘要

A method to control storage into and depletion from multiple energy storage devices. The method enables an operative connection between the energy storage devices and respective power converters. The energy storage devices are connectible across respective first terminals of the power converters. At the second terminals of the power converter, a common reference is set which may be a current reference or a voltage reference. An energy storage fraction is determined respectively for the energy storage devices. A voltage conversion ratio is maintained individually based on the energy storage fraction. The energy storage devices are stored individually with multiple variable rates of energy storage through the first terminals. The energy storage is complete for the energy storage devices substantially at a common end time responsive to the common reference.

主权项

1. A method comprising:
transferring power from an electrical network to a plurality of energy storage devices using a plurality of power converters such that the energy storage devices reach predetermined charge values at a common charging end time; and transferring power from the plurality of energy storage devices to the electrical network using the plurality of power converters, such that the energy storage devices reach predetermined depletion values at a common discharging end time, the plurality of power converters each having first terminals that connect the plurality of power converters one-to-one to the plurality of energy storage devices, and the plurality of power converters each having second terminals connected to the electrical network.