Management of battery capacity
First Claim
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1. A method for providing selective electricity grid modulation from a backup battery system for a facility which is connected to the grid, comprising:
- providing one or more batteries in the backup battery system;
providing a converter for converting from AC to DC for charging the batteries from the grid, and an inverter for converting from DC to AC to supply the facility load and to selectively supply the grid;
selectively connecting the inverter AC output to the grid and modulating to provide grid regulation;
designating at least one of the one or more batteries for use as both a backup supply for said facility and for grid regulation;
designating a first part of a capacity of said batteries for use as a backup supply;
designating a second part of the capacity of said batteries for use for grid regulation; and
selectively charging the second part from the grid via the converter, or selectively discharging the second part via the inverter to the grid, a peak power available to the second part is less than a peak facility load such that a total rectifier power always appears as a load from the grid connection, allowing participation in load management schemes.
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Accused Products
Abstract
Disclosed is a battery cell system, which provides regulation service to the grid, as well as the battery being used as part of an uninterruptible power supply (UPS). Part of the capacity of the storage batteries may be used for regulation service, while maintaining a reserve of battery capacity to provide the UPS supply if required. An advantage is that the battery installation can be more effectively monitored as it is more regularly being charged and discharged.
9 Citations
16 Claims
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1. A method for providing selective electricity grid modulation from a backup battery system for a facility which is connected to the grid, comprising:
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providing one or more batteries in the backup battery system; providing a converter for converting from AC to DC for charging the batteries from the grid, and an inverter for converting from DC to AC to supply the facility load and to selectively supply the grid; selectively connecting the inverter AC output to the grid and modulating to provide grid regulation; designating at least one of the one or more batteries for use as both a backup supply for said facility and for grid regulation; designating a first part of a capacity of said batteries for use as a backup supply; designating a second part of the capacity of said batteries for use for grid regulation; and selectively charging the second part from the grid via the converter, or selectively discharging the second part via the inverter to the grid, a peak power available to the second part is less than a peak facility load such that a total rectifier power always appears as a load from the grid connection, allowing participation in load management schemes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for providing selective electricity grid modulation from a backup battery system for a facility which is connected to the grid, comprising:
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providing one or more batteries in the backup battery system, the facility having a facility load and the system having a peak battery recharging power; providing a converter for converting from AC to DC for charging the batteries from the grid, and an inverter for converting from DC to AC to supply the facility load and to selectively supply the grid; selectively connecting the inverter AC output to the grid and modulating to provide grid regulation; designating at least one of the one or more batteries for use as both a backup supply for said facility and for grid regulation; designating a first part of a capacity of said batteries for use as a backup supply; designating a second part of the capacity of said batteries for use for grid regulation, the grid regulation function requires a frequency regulation power, the frequency regulation power plus the facility load is selected to be less than or equal to the peak battery recharging power so that frequency regulation service and battery recharging needs following a power outage are exclusive, allowing the connection power requirements to be minimised; and selectively charging the second part from the grid via the converter, or selectively discharging the second part via the inverter to the grid. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification