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Application US20190079473
Published 2019-03-14
Building Energy System With Stochastic Model Predictive Control And Demand Charge Incorporation
A building energy system includes equipment configured to consume, store, or discharge one or more energy resources purchased from a utility supplier. At least one of the energy resources is subject to a demand charge. The system further includes a controller configured to determine an optimal allocation of the energy resources across the equipment over a demand charge period. The controller includes a stochastic optimizer configured to obtain representative loads and rates for the building or campus for each of a plurality of scenarios, generate a first objective function comprising a cost of purchasing the energy resources over a portion of the demand charge period, and perform a first optimization to determine a peak demand target for the optimal allocation of the energy resources. The peak demand target minimizes a risk attribute of the first objective function over the plurality of the scenarios. The controller is configured to control the equipment to achieve the optimal allocation of energy resources.
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- 1. A building energy system configured to serve energy loads of a building or campus, the system comprising:
equipment configured to consume, store, or discharge one or more energy resources purchased from a utility supplier, wherein at least one of the energy resources is subject to a demand charge; and a controller configured to determine an optimal allocation of the energy resources across the equipment over a demand charge period, the controller comprising a stochastic optimizer configured to:
obtain representative loads and rates for the building or campus for each of a plurality of scenarios;
generate a first objective function comprising a cost of purchasing the energy resources over a portion of the demand charge period; and
perform a first optimization to determine a peak demand target for the optimal allocation of the energy resources, wherein the peak demand target minimizes a risk attribute of the first objective function over the plurality of the scenarios;
wherein the controller is configured to control the equipment to achieve the optimal allocation of energy resources.
- 13. A method for managing equipment in a building energy system over a demand charge period, the method comprising:
operating the equipment to consume, store, or discharge one or more energy resources purchased from a utility supplier, wherein at least one of the energy resources is subject to a demand charge; obtaining representative loads and rates for the building or campus for each of a plurality of scenarios; generating a first objective function comprising a cost of purchasing the energy resources over a portion of the demand charge period; and performing a first optimization to determine a peak demand target for an optimal allocation of the energy resources, wherein the peak demand target minimizes a risk attribute of the first objective function over the plurality of the scenarios.
