Research on New Power System Planning Considering Electrochemical Energy Storage

Electrochemical energy storage has the characteristics of rapid response, bidirectional adjustment, small-scale, and short construction period. Its large-scale application is the key to support the construction of new power system. Combined with the development status of electrochemical energy storage and the latest research results from both China and overseas, this paper analyzes the typical application scenarios of energy storage on power grid side, power supply side, and user side. On this basis, a new power system energy storage planning method was proposed, which comprehensively considers system flexibility, new energy consumption and economic requirements, and an optimization model of power network planning including electrochemical energy storage was established. At the same time, in order to measure the effect of energy storage configuration on suppressing the volatility of new energy, the corresponding stability evaluation indicators are put forward as optimization constraints. Finally, taking a 200GW-level power system as an example, the proposed planning algorithm, typical scenario applications and configuration principles are verified through calculation examples, and the corresponding energy storage configuration scheme is proposed as well. The calculation results show that the method proposed in this paper is feasible and effective, that can provide a new technical means for the preparation of the "14th Five-Year" power plan.