BUILDING ENERGY SYSTEM WITH STOCHASTIC OPTIMIZATION

A building energy system includes equipment operable to consume, store, or discharge energy resources purchased from a utility supplier to satisfy energy loads and a controller configured to allocate the energy resources across the equipment over a prediction horizon by performing a stochastic optimization of an objective function. The objective function includes a first cost of purchasing the energy resources based on first decision variables to satisfy a first alternative set of energy loads over the prediction horizon and a second cost of purchasing the energy resources based on second decision variables to satisfy a second alternative set of energy loads over the same prediction horizon. The controller performs the stochastic optimization to determine values of the first and second decision variables subject to corresponding constraints based on the first and second alternative sets of energy loads and controls the equipment based on a result of the stochastic optimization.