The Capacity Joint Optimization of Energy Storage and Renewable Generation Based on Simulation

In the power grid with high penetration of renewable energy (RE), energy storage plays an important role in reducing the curtailment quantity of RE. In the future, the coordinated operation of multi-energy will become the development direction of the power system. The suitable capacity of energy storage to obtain the best economic benefit is related to the capacity of the renewable energy in the system. For a multi-energy complementary system with high penetration of RE, a long-term planning model to co-optimize the capacity of energy storages and renewable generation based on the time sequence simulation method (TSSM) is proposed. A typical multi-energy system is investigated in the paper. Besides the conventional constraints, the operation constraints of charge-discharge properties of the battery energy storage, the curtailment rate of RE and the features of concentrating solar power (CSP) all are taken into consideration. The proposed model can ensure the annual power balance with renewable power generation at different period of time. the results verify the rationality of the proposed model and the correctness of the theoretical analysis, which is instructive for the capacity planning of the energy storage and renewable generation in the system with high penetration of RE.