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A Novel Source-grid-load-storage Coordinated Power System Expansion Planning Model: A Case Study on China's Power system Transition

Since power sector will play a crucial role in energy transition, it is necessary to have a reasonable power system planning model that can figure out the optimal development pathway from the perspective of the whole system. Traditionally, power systems consist of three part, generation source, transmission grid and load demand. In the future, energy storage will also become an indispensable part in power systems, since more flexibility is required to render the systems optimal operation with high penetration of variable energy resources. This paper proposes a novel source-grid-load-storage coordinated power system planning model, in which all the resources in power source side, grid side, load side and storage side are considered simultaneously. All the relations among them are reflected in the mathematical formulas in the model. Based on this model, a case study is carried out on China's national power system. The optimal development pathway of various power sources, interregional grids, load side resources and energy storages till 2050 is worked out, which may be referable for China's power sector transition.