Energy storage module with DC voltage intermediate circuit
First Claim
1. An energy storage module for reversibly storing electrical energy in the form of mechanical rotation energy, comprising a plurality of flywheel storage units, at least one control system and at least one module control unit, wherein the flywheel storage units are connected electrically in parallel by means of a common DC voltage intermediate circuit and the at least one control system is connected to the common DC voltage intermediate circuit by way of an output side of the at least one control system and to at least one external voltage grid by way of an input side of the at least one control system, wherein the at least one module control unit is provided for transmitting suitable pre-specified torques to the flywheel storage units for emitting or absorbing energy to/from the common DC voltage intermediate circuit, and the at least one control system is designed to control a DC voltage in the common DC voltage intermediate circuit such that the DC voltage remains substantially constant between an upper threshold value and a lower threshold value when energy is emitted into the at least one external voltage grid and when energy is absorbed from the at least one external voltage grid, where the at least one control system is provided to control the energy flow between the connected at least one external voltage grid and the flywheel energy storage units in order to execute control and system tasks in the at least one external voltage grid in a manner provided by the at least one module control unit.
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Accused Products
Abstract
An energy storage module is provided for reversibly storing electrical energy in the form of mechanical rotation energy. The energy storage module comprises a plurality of flywheel storage units, at least one control system and at least one module control unit, wherein the flywheel storage units are connected electrically in parallel by means of a common DC voltage intermediate circuit, and the control system or systems is/are connected to the common DC voltage intermediate circuit by way of the respective output side and to at least one external voltage grid by way of the respective input side, wherein the module control unit is provided for transmitting suitable prespecified torques to the flywheel storage units for emitting or absorbing energy to/from the DC voltage intermediate circuit, and at least one of the control systems is designed to control the DC voltage in the DC voltage intermediate circuit.
6 Citations
24 Claims
- 1. An energy storage module for reversibly storing electrical energy in the form of mechanical rotation energy, comprising a plurality of flywheel storage units, at least one control system and at least one module control unit, wherein the flywheel storage units are connected electrically in parallel by means of a common DC voltage intermediate circuit and the at least one control system is connected to the common DC voltage intermediate circuit by way of an output side of the at least one control system and to at least one external voltage grid by way of an input side of the at least one control system, wherein the at least one module control unit is provided for transmitting suitable pre-specified torques to the flywheel storage units for emitting or absorbing energy to/from the common DC voltage intermediate circuit, and the at least one control system is designed to control a DC voltage in the common DC voltage intermediate circuit such that the DC voltage remains substantially constant between an upper threshold value and a lower threshold value when energy is emitted into the at least one external voltage grid and when energy is absorbed from the at least one external voltage grid, where the at least one control system is provided to control the energy flow between the connected at least one external voltage grid and the flywheel energy storage units in order to execute control and system tasks in the at least one external voltage grid in a manner provided by the at least one module control unit.
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13. A method for controlling an energy storage module for reversibly storing electrical energy in the form of mechanical rotation energy, comprising a plurality of flywheel storage units, at least one control system and at least one module control unit, wherein the flywheel storage units are connected electrically in parallel by means of a common DC voltage intermediate circuit and the at least one control system is connected to the common DC voltage intermediate circuit by way of an output side of the at least one control system and to at least one external voltage grid by way of an input side of the at least one control system, and the at least one control system is designed to control a DC voltage in the common DC voltage intermediate circuit such that the DC voltage remains substantially constant between an upper threshold value and a lower threshold value when energy is emitted into the at least one external voltage grid and when energy is absorbed from the at least one external voltage grid, where the at least one control system is provided to control the energy flow to the connected at least one external voltage grid in order to execute control and system tasks in the at least one external voltage grid in a manner provided by the at least one module control unit, comprising:
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transmitting a pre-specified torque for accelerating the flywheel control units by means of the at least one module control unit to the flywheel units in response to an energy flow from the at least one external voltage grid into the common DC voltage intermediate circuit or; transmitting a pre-specified torque for braking the flywheel storage units by means of the at least one module control unit to the flywheel storage units in response to an energy flow from the common DC voltage intermediate circuit into the at least one external voltage grid or; and no transmission of pre-specified torques for the flywheel storage units in response to no energy flow into or from the common DC voltage intermediate circuit. - View Dependent Claims (14, 20, 21, 22, 23, 24)
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Specification