A Source-Load-Storage Integrated Planning Model for Power System with High Proportion of Renewable Energy

Under the vision of high proportion renewable energy power system in the future, the renewable energy (RE) such as wind power/PV with variation and uncertainty, as the main energy supplier, brings great flexibility demand to the power system. Typical model considering only one type of flexible resource and the power planning method based on the net load envelope will no longer applicable in such new complex scenarios. This paper introduces flexibility index to quantitatively evaluate the regulatory potential of the source-load-storage multi-type flexible resources and incorporate into the planning model as an optimal decision variable. Thus, a high-proportion RE planning model with the goal of minimizing the cost of full-cycle investment is established. And through three process modules of production simulation, flexibility evaluation and power investment decision making, the optimal power planning scheme of best flexibility performance can be realized. Finally, case study is proceed basing on the 2050 long term planning of a provincial power grid in Northeast China, and above model and algorithm is verified.