ON DEMAND ELEVATOR LOAD SHEDDING
First Claim
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1. A method of operating an elevator system, the method comprising:
- receiving a request from a power utility to reduce electrical demand of a building;
reducing power received by an elevator system from a power distribution system for delivering power from the power utility;
connecting a secondary power source to the elevator system to provide power to the elevator system during a period in which the request to reduce electrical demand of the building continues; and
increasing power received by the elevator system from the power distribution system when the request to reduce electrical demand ends.
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Abstract
Upon request from a power utility to reduce the electrical demand of a building, an elevator system is automatically disconnected from power being delivered by the power utility (or remains connected but receives limited power from the power utility), and a secondary power storage device is connected to the power bus of the elevator system. The secondary power storage device provides power to the elevator system during a period in which the request to reduce electrical load of the building is in effect. When the request end, the elevator system is automatically reconnected to the power delivered by the power utility and can potentially work in a hybrid mode.
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Citations
20 Claims
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1. A method of operating an elevator system, the method comprising:
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receiving a request from a power utility to reduce electrical demand of a building; reducing power received by an elevator system from a power distribution system for delivering power from the power utility; connecting a secondary power source to the elevator system to provide power to the elevator system during a period in which the request to reduce electrical demand of the building continues; and increasing power received by the elevator system from the power distribution system when the request to reduce electrical demand ends. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system comprising:
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an energy management system for receiving a request from a power utility to reduce electrical demand of a building on a power distribution system; a secondary power source; and an elevator system that, in response to the request received by the energy management system, operates using power from the secondary power source alone or in conjunction with reduced power from the power distribution system. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification