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US 12,706,467 B2Granted
Controlling an energy storage device
AssigneeSiemens Gamesa Renewable Energy A/S
InventorsPaul Brian Brogan, Thyge Knueppel
Life of this patent
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Abstract
Provided is a method of controlling an energy storage device arranged to provide frequency support for an AC power system, the method including: setting an amount of energy stored in the energy storage device depending on a power system frequency of the AC power in the AC power system.
Claims12
A method of controlling an energy storage device arranged to provide frequency support for an AC power system, the method comprising:
- setting an amount of energy stored in the energy storage device depending on a power system frequency of the AC power in the AC power system,
- wherein the energy storage device comprises an energy storage capacitor,
- wherein setting the amount of energy stored in the energy storage capacitor depending on the power system frequency comprises setting a voltage of the energy storage capacitor depending on the power system frequency,
- wherein an energy supply device comprises an AC-DC converter connected to the AC power system and a DC-link,
- wherein the energy supply device further comprises a DC-DC converter connected to the DC-link, the DC-DC converter being connected to the energy storage capacitor, and wherein the AC-DC converter and/or the DC-DC converter is controlled by a control signal, and wherein setting the amount of energy stored in the energy storage device comprises:
- deriving a charging or discharging action depending on the power system frequency and a charging state indicating signal of the energy storage device, wherein deriving the charging or discharging action comprises:
- deriving the control signal depending on the power system frequency and the charging state indicating signal;
- and
- controlling the energy supply device, connected to exchange energy with the energy storage device, based on the control signal.
6 more elements
An arrangement for controlling an energy storage device arranged to provide frequency support for an AC power system, the arrangement comprising:
- a processing module adapted to set an amount of energy stored in the energy storage device depending on a power system frequency of the AC power in the AC power system,
- wherein the energy storage device comprises an energy storage capacitor,
- wherein setting the amount of energy stored in the energy storage capacitor depending on the power system frequency comprises setting a voltage of the energy storage capacitor depending on the power system frequency,
- wherein an energy supply device comprises an AC-DC converter connected to the AC power system and a DC-link,
- wherein the energy supply device further comprises a DC-DC converter connected to the DC-link, the DC-DC converter being connected to the energy storage capacitor, and wherein the AC-DC converter and/or the DC-DC converter is controlled by a control signal, and wherein the amount of energy stored in the energy storage device comprises:
- a charging or discharging action derived from the power system frequency and a charging state indicating signal of the energy storage device,
- wherein the charging or discharging action comprises:
- the control signal derived from the power system frequency and the charging state indicating signal;
- and
- wherein the energy supply device is controlled, connected to exchange energy with the energy storage device, based on the control signal.
7 more elements
Dependencies are inferred from the claim text.