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US 10,483,870 B2Granted
Power conversion method using variable potential energy storage devices
AssigneeOffshore Renewable Energy Catapult
InventorsChong Hwa Ng, Paul McKeever, Michael Edward Smailes
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Abstract
A power conversion method comprising: charging a plurality of energy storage devices of a power converter from an input power source; and sequentially coupling and decoupling energy storage devices of the plurality of energy storage devices to an output. Charging the plurality of energy storage devices comprises maintaining at least two of the plurality of energy storage devices at substantially different potentials.
Claims18
A power conversion method, comprising:
- charging a plurality of energy storage devices of a power converter from an input power source, wherein the power converter comprises at least one branch including a first arm connected between an AC terminal and a first DC rail and a second arm connected between the AC terminal and a second DC rail;
- and
- sequentially coupling and decoupling energy storage devices of the plurality of energy storage devices to an output, wherein
- charging the plurality of energy storage devices comprises maintaining at least two of the plurality of energy storage devices at substantially different potentials, and wherein
- a plurality of energy storage devices in each arm are grouped into sets of at least two energy storage devices, and a control unit is arranged to control charging of the energy storage devices, within each set, to a substantially equal potential, and the energy storage devices in each set of an arm are charged to a significantly different potential from all other sets of said arm.
2 more elements
A power converter comprising:
- at least one branch including a first arm connected between an AC terminal and a first DC rail and a second arm connected between the AC terminal and a second DC rail;
- and
- a plurality of energy storage devices and a control unit, said control unit arranged to control charging of the energy storage devices by an input power source, and said control unit is further arranged to control a sequential coupling and decoupling of the energy storage devices to an output of the converter, wherein
- charging the plurality of energy storage devices comprises maintaining at least two of the plurality of energy storage devices at substantially different potentials, and wherein
- a plurality of storage devices in each arm are grouped into sets of at least two energy storage devices, and the control unit is arranged to control charging of the energy storage devices, within each set, to a substantially equal potential, and the energy storage devices in each set of an arm are charged to a significantly different potential from all other sets of said arm.
2 more elements
Dependencies are inferred from the claim text.