Study on steady-state power flow optimization of cold-heat-electricity integrated energy system

The steady-state power flow optimization of the integrated energy system (IES) is the basis of planning and design of the integrated energy system. Based on a typical structure of the cold-heat-electricity integrated energy system, this paper constructs a steady-state power flow model of the cold-heat-electricity integrated energy system for system planning, and takes the power balance and power flow balance of power subsystem, thermal subsystem and the cold-heat-electricity coupling link as constraints, and takes the lowest cost of system investment and construction and the lowest cost of pollution control as the objective function, the steady-state power flow optimization of the integrated energy system is carried out. The calculation results show that the system has stable energy supply and complementary collocation of cold, hot and electric energy; however, the system has a large dependence on power energy demand and relatively high power grid energy loss; the pipeline flow and water supply temperature in the thermal subsystem are also high, which increases the construction cost of the thermal network management channel.