Robust Optimization of Integrated Energy System Considering Multiple Thermal Inertia and Wind Power Uncertainty

Abstract

Due to a large winter heat load demand and the long heating time in the ‘Three North’ area, the combined heat and power system can effectively improve the energy utilization efficiency. At the same time, the wind energy resources of this area are abundant, but the wind abandonment phenomenon is serious because of the uncertainty of wind output. The multiple thermal inertias of the heating system can improve wind power consumption under the condition of uncertain wind power output. In order to improve the absorbing ability of the system under the condition of uncertain wind power output, a comprehensive energy system robust optimization model considering the multiple thermal inertias of the thermal system and the uncertainty of wind power is proposed. Firstly, the thermal inertia model of heating pipe network and heat load side of the thermal system is established. Then a robust optimization strategy of integrated energy system considering multiple thermal inertia and wind power output uncertainty is proposed to minimize the operation cost and promote wind power consumption. Finally, the effectiveness of the proposed model and method is verified by a calculation example, and the effect of heating network and thermal load inertia on improving wind power consumption under the condition of uncertain wind power output is analyzed.