Protection system for power distribution systems
First Claim
Patent Images
1. A protection system for a power distribution system, comprisinga central computer;
- a plurality of data modules each in communication with a different circuit breaker of the power distribution system; and
a data network communicating between said central computer and said plurality of data modules, wherein said central computer sends an instruction to said plurality of data modules over said data network, each of said plurality of data modules adjusting a sample period based on said instruction to aid in synchronization of sampling of a power condition at said plurality of data modules.
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Abstract
A protection system for a power distribution system is provided. The protection system includes a central computer, a plurality of data modules, and a data network. The data modules are each in communication with a different circuit breaker of the power distribution system. The data network communicates between the central computer and the plurality of data modules. The central computer sends an instruction to the plurality of data modules over the data network to aid in synchronization of sampling of a power condition at the plurality of data modules.
289 Citations
29 Claims
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1. A protection system for a power distribution system, comprising
a central computer; -
a plurality of data modules each in communication with a different circuit breaker of the power distribution system; and a data network communicating between said central computer and said plurality of data modules, wherein said central computer sends an instruction to said plurality of data modules over said data network, each of said plurality of data modules adjusting a sample period based on said instruction to aid in synchronization of sampling of a power condition at said plurality of data modules. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of protecting a power distribution system, comprising:
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sending a synchronization instruction to a plurality of data modules; running a phase-lock-loop algorithm on each of said plurality of data modules; sampling a power condition from the power distribution system based upon said phase-lock-loop algorithm as adjusted by said synchronization instruction, each of said plurality of data modules being in communication with a different set of separable contacts in the power distribution system; transmitting a first message containing said power condition from each of said plurality of data modules to a central computer; determining a second message in said central computer based upon said first message; and transmitting said second message to each of said plurality of data modules so that one or more of said plurality of data modules operates said different set of separable contacts in response to said second message. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A method of protecting a power distribution system, comprising:
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sending a synchronization instruction to a plurality of data modules; running a phase-lock-loop algorithm on each of said plurality of data modules; sampling a power condition from the power distribution system based upon said phase-lock-loop algorithm as adiusted by said synchronization instruction, each of said plurality of data modules being in communication with a different set of separable contacts in the power distribution system; transmitting a first message containing said power condition from each of said plurality of data modules to a central computer; determining a second message in said central computer based upon said first message; and transmitting said second message to each of said plurality of data modules so that one or more of said plurality of data modules operates said different set of separable contacts in response to said second message, wherein said second message includes at least a portion of said synchronization instruction.
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21. A method of protecting a power distribution system, comprising:
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sending a synchronization instruction to a plurality of data modules; running a phase-lock-loop algorithm on each of said plurality of data modules; sampling a power condition from the power distribution system based upon said phase-lock-loop algorithm as adiusted by said synchronization instruction, each of said plurality of data modules being in communication with a different set of separable contacts in the power distribution system; transmitting a first message containing said power condition from each of said plurality of data modules to a central computer; determining a second message in said central computer based upon said first message; and transmitting said second message to each of said plurality of data modules so that one or more of said plurality of data modules operates said different set of separable contacts in response to said second message, wherein said central computer performs all protection decisions, control decisions, and monitoring decisions of the power distribution system.
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22. A power distribution system comprising:
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a processing unit; a first power bus for powering a first branch circuit through a first circuit breaker and a second branch circuit through a second circuit breaker; a first data module configured to operate said first circuit breaker and to sample a first parameter from said first branch circuit; a second data module configured to operate said second circuit breaker and to sample a second parameter from said second branch circuit; and a data network linking said first and second data modules to said processing unit, said processing unit performing all primary power distribution functions for the power distribution system based on said first and second parameters, wherein said processing unit communicates a synchronization signal to said first and second data modules so that said first and second data modules sample said first and second parameters, respectively, with in a predetermined time-window. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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29. A power distribution system comprising:
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a processing unit; a first power bus for powering a first branch circuit through a first circuit breaker and a second branch circuit through a second circuit breaker; a first data module configured to operate said first circuit breaker and to sample a first parameter from said first branch circuit; a second data module configured to operate said second circuit breaker and to sample a second parameter from said second branch circuit; a data network linking said first and second data modules to said processing unit, said processing unit performing all primary power distribution functions for the power distribution system based on said first and second parameters, wherein said processing unit communicates a synchronization signal to said first and second data modules so that said first and second data modules sample said first and second parameters, respectively, within a predetermined time-window; a first main breaker for providing power from a first power feed to said first power bus; a first main data module configured to operate said first main circuit breaker and to sample a first main parameter from said first power feed, wherein said processing unit communicates said synchronization signal to said main data module, said main data module sampling said first main parameter based in part based on said synchronization signal, and said main data module sending said first main parameter to said processing unit; a second main breaker for providing power from a second power feed to a second power bus; a second main data module configured to operate said second main circuit breaker and to sample a second main parameter from said second power feed; a tie breaker for providing power between said first and second power buses; and a tie breaker data module configured to operate said tie breaker and to sample a tie parameters from said first and/or second power buses, wherein said first main, second main, and tie data modules sample said first main, said second main, and said tie parameters, respectively, and send said first main, said second main, and said tie parameters, respectively, to said processing unit so that said central control processing unit can perform all primary power distribution functions for the power distribution system.
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Specification