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Research on Integration Optimization of Integrated Energy System Planning and Operation Based on Model Linearization

In response to the needs of park-level integrated energy planning, this paper establishes the linearization input and output models of energy conversion components for photovoltaic, wind generations, electric heating boilers, heat pumps, refrigerators, CCHP (combined cooling, heat and power), gas boilers, and energy storage components for electric energy storage, heat storage, and cooling storage. The multi-energy flow coupling input and output matrix for electricity, cooling, heat and gas is put forward to describe the coupling relationship of conversion, distribution and storage for multi-energy flows. Taking economic optimization as objective, equipment capacity and operation boundaries as constraints, a bi-level iterative mixed integer optimization planning method for integrated energy planning and operation is proposed. The case study shows that the method proposed in this paper is able to support the optimal planning of the integrated energy system planning and operation.