Electric utility system with superconducting magnetic energy storage
First Claim
1. A voltage recovery device for connection to a utility power network including a transmission line which carries a nominal voltage and a distribution line network connected to the transmission line network, the distribution line network carrying a distribution voltage less than the nominal voltage on the transmission line network, the voltage recovery device comprising an energy storage unit connected in shunt to the distribution line network and configured to transfer real and reactive power between the utility power network and voltage recovery device at a level and for a duration to recover the voltage on the utility power network to within a predetermined proportion of the nominal voltage, following a fault condition detected on the utility power network.
1 Assignment
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Accused Products
Abstract
a voltage recovery device is configured to provide real and reactive power to a utility power network at a sufficient level and for a sufficient duration to recover the voltage on the utility power network within a predetermined proportion of the nominal voltage, following a fault condition detected on the utility power network. Moreover, the voltage recovery device reduces the overall transmission losses in a utility power system.
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Citations
29 Claims
- 1. A voltage recovery device for connection to a utility power network including a transmission line which carries a nominal voltage and a distribution line network connected to the transmission line network, the distribution line network carrying a distribution voltage less than the nominal voltage on the transmission line network, the voltage recovery device comprising an energy storage unit connected in shunt to the distribution line network and configured to transfer real and reactive power between the utility power network and voltage recovery device at a level and for a duration to recover the voltage on the utility power network to within a predetermined proportion of the nominal voltage, following a fault condition detected on the utility power network.
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10. A method of stabilizing a utility power network including a transmission line which carries a nominal voltage and a distribution line network connected to the transmission line network, the distribution line network carrying a distribution voltage less than the nominal voltage on the transmission line network, the method comprising:
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electrically connecting in shunt a voltage recovery device having an energy storage unit to the distribution line network, detecting a fault condition on the utility power network; and
operating, in response to detecting the fault condition, the voltage recovery device to transfer real power and reactive power to the distribution line network at a level and for a duration to recover the voltage on the utility power network to within a predetermined proportion of the nominal voltage. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A method of stabilizing a utility power network wherein the utility power network includes a transmission network and a distribution network, the method comprising:
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electrically connecting in shunt plural voltage recovery devices, each having an energy storage unit, to the distribution network, detecting a fault condition on the utility power network; and
operating, in response to detecting the fault condition, the voltage recovery devices to transfer real power and reactive power to the utility power network at a level and for a duration to recover the voltage on the transmission network to within a predetermined proportion of a nominal voltage. - View Dependent Claims (19, 20, 21)
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22. A utility power network comprising:
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a transmission line network carrying a nominal voltage;
a plurality of distribution line networks, each connected to the transmission line network, each of the distribution line networks carrying a distribution voltage less than the nominal voltage on the transmission line network; and
a plurality of voltage recovery devices, each connected in shunt to at least one of the distribution line networks, and each of the plurality of voltage recovery devices is configured to transfer real and reactive power between the distribution line network and the voltage recovery device at a level and for a duration to recover the voltage on the utility power network to within a predetermined proportion of the nominal voltage of the transmission line network, following a fault condition detected on the utility power network. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29)
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Specification