Optimal Control of Energy Systems in Net-Zero Energy Buildings Considering Dynamic Costs: A Case Study of Zero Carbon Building in Hong Kong

Abstract

Net-zero energy buildings coupled with multiple energy demands on the load side, which utilize renewable energy to a larger extent, are an effective way to consume distributed capacity in situ and need to face the operational challenges brought by the uncertainty of renewable energy while meeting different energy demands. To this end, this paper proposes a Dynamic Cost Interaction Optimization Model (DCI-OM) with Electric Vehicle Charging Station (EVCS) based on dynamic cost (i.e., oil price, electricity price) and considers a larger proportion of renewable energy capacity to be consumed. In this model, the optimized electricity and cooling demand dispatch scheme is given with daily operating cost as the objective function. Using the Zero Carbon Building in Hong Kong, China, as an example, simulations are performed for typical days (i.e., 21 March, 21 June, 22 September, and 21 December) in four seasons throughout the year. The results show that the electric and cooling load demand response scheme given by DCI-OM achieves peak and valley reduction according to the dynamic cost and reduces the original operating costs while ensuring that the customer’s comfort needs are within acceptable limits. The optimized scheduling scheme meets the demand while reducing the daily operating cost.