Power flow calculation method for electric heating combined system considering multiple losses of heat supply pipe network

The invention discloses an electricity and heat combined system load flow calculation method considering multiple losses of a heat supply network, and belongs to the field of comprehensive energy system operation and control. The electricity and heat combined system load flow calculation method comprises the following steps that 1, resistance borne by hot water when the hot water flows in a pipeline is analyzed, and a heat supply network hydraulic load flow model is established; 2, various heat exchanges carried out on the heat supply pipeline are analyzed, and a heat supply network heat power flow model is established; 3, establishing a power flow model of the power system; 4, establishing a coupling element power flow model according to the power characteristics of the coupling element; 5, the models established in the step 1, the step 2, the step 3 and the step 4 are simultaneously established; and 6, carrying out load flow calculation on the electric heating combined system by using a distributed sequenti