Abstract:This paper builds the basic grid structure of the park-type integrated energy system,establishes the mathematical models of heat pump units,cogeneration units,heat storage tanks,electric boilers,electric refrigerators,and waste heat absorption refrigerators,and constructs a double-layer optimal configuration model considering the constraints of the park's energy supply network constraint.The upper layer of the model aims to minimize the annual comprehensive investment cost of the energy station in the park,and the lower layer of the model aims at the lowest annual operating cost of the system.Based on the Distflow second-order cone model of the distribution network and linear heat network equation the energy supply network model is established.In the process of planning and solving,the second-order cone relaxation technology is introduced to perform convex optimization relaxation on the power flow constraints of the model.At the same time,linear heat network equations are used to improve the solvability and calculation speed of the model.Finally,an example is analyzed in the modified IEEE-33-node distribution network and 8-node heating network system.The results prove that the system optimization configuration model constructed improves the economy of the park-type integrated energy system to a certain extent,and verifies the effectiveness of the proposed model.