Optimal Operation of Multi-energy Complementary Microgrid with Cooling, Thermal and Electricity Load

Abstract

With the rapid development of microgrid (MG), the optimal operation of MG is one of the key technologies researched in the power field currently. The optimal operation is very important to the management of microgrid. This paper proposes a complementary microgrid that inputs solar energy and natural gas energy, supplying three types of loads: cooing, heat, electricity. Based on establishing a mathematical model for device in the microgrid, a model for optimizing operation of the complementary microgrid considering the different loads in different seasons is proposed. This model considers the multiple demands for three types of loads, and aims at the lowest total operation and maintenance cost of the multienergy complementary microgrid. During the operation, the optimization strategy of “Follow Electricity Load” is adopted to solve the mismatching of multiple loads. Finally, through the case study of the complementary microgrid based on the student dormitory, the energy consumption and total operation and maintenance cost are compared with separate supply system for cooling, thermal and electricity load, which verifies the feasibility and economy of the proposed model for optimizing operation.