A power flow analysis method for the integrated electricity-heat system in distribution network based on forward/backward iterations

As an efficient way for improving utilization efficiency of energy sources and reducing the environmental pollutions, integrated energy system has gained rapid development. Meanwhile, traditional power flow calculation methods, which are focused on the electric power system, may fail to satisfy the need of analyzing coupled energy flow. In this paper, an integrated electricity-heat power flow method in distribution network is proposed. Firstly, models of electricity and heat networks are established in this paper. On this basis, an integrated electricity-heat power flow matrix is built, which is based on thermal model and a direct load flow method. Moreover, forward/backward iterations are utilized to solve the integrated electricity-heat power flow problem. The feasibility and effectiveness as well as accuracy, efficiency and robustness are simulated on a real distribution network.