Equivalent model-based simulation method and device of energy storage system

Abstract

The invention relates to an equivalent model-based simulation method and device of an energy storage system. The method comprises the steps of acquiring dispatching demand and power generation data ofa power grid, and calculating a charge state of a battery pack in each energy storage unit at a next moment; and substituting the dispatching demand, the power generation data of the power grid and the charge state of the battery pack in each energy storage unit into an equivalent model which is built in advance for calculation, and obtaining running data of an energy storage sub-system until simulation is ended. The equivalent energy storage units are combined by the equivalent model, the external characteristic of an energy storage power station is enabled to be approximate to a detailed model as well as the complexity of the simulation model in the energy storage system is reduced, so that the simulation effectiveness is ensured.

Description

technical field [0001] The invention relates to the field of new energy power generation, in particular to a method and device for simulating an energy storage system based on an equivalent model. Background technique [0002] With the continuous development of new energy technologies, solar energy and wind energy have become representatives of new energy sources due to their clean, pollution-free and renewable advantages. The emergence of large-scale energy storage systems has not only promoted the development of photovoltaic and wind power generation; it can also cooperate with photovoltaic and wind turbines to achieve smooth output, peak shaving and valley filling, and tracking of planned output, which increases the controllability of power generation and reduces The randomness and volatility of the power generation system are eliminated, and the grid-connected capacity of wind and wind power generation is improved. However, when a large-scale battery energy storage syst...

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Problems solved by technology

However, when a large-scale battery energy storage system is running, the network structure system is complex, and the number of battery packs and energy storage converters is large, it will be difficult to obtain simulation results in a short time, which is not conducive to the research and development of energy storage systems. Some parameters of each energy storage unit in the energy system will gradually approach during the operation process. During the simulation process of the energy storage system, there are unnecessary repeated calculations for energy storage units with similar parameters, which reduces the simulation efficiency.

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