A method and device for simulating an energy storage system based on an equivalent model
An equivalent model and energy storage system technology, applied in circuit devices, AC network load balancing, AC network circuits, etc., can solve unfavorable research and development of energy storage systems, reduce simulation efficiency, battery packs and energy storage converters A large number of problems, to achieve the effect of simple structure, reduce complexity, and reduce the amount of calculation
Active Publication Date: 2022-07-26
CHINA ELECTRIC POWER RES INST +1
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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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[0063] In order to better understand the present invention, the content of the present invention will be further described below with reference to the accompanying drawings and examples.
[0064] In this embodiment, a method and a device for simulating an energy storage system based on an equivalent model are provided. Based on the VSG (virtual synchronous generator) technology, the energy storage system can be controlled to be connected to the grid and the energy storage converter can be controlled to a certain extent. The operation characteristics of the synchronous generator are simulated on the above, so that the grid-connected energy storage converter has excellent performance even surpassing that of the synchronous generator. On the premise that the energy storage system is divided into multiple energy storage units, the power of each energy storage unit is reasonably distributed and the virtual synchronous machine control method is adopted at the same time. Equivalent c...
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A method and device for simulating an energy storage system based on an equivalent model, comprising: collecting dispatching demand, grid power generation data, and calculating the state of charge of a battery pack in each energy storage unit at the next moment; The data and the state of charge of the battery pack in each energy storage unit are substituted into the pre-built equivalent model for calculation, and the operation data of the energy storage subsystem is obtained until the end of the simulation. The invention combines the equivalent energy storage units through the equivalent model, which reduces the complexity of the simulation model in the energy storage system and ensures that the external characteristics of the energy storage power station are close to the detailed model, thereby ensuring the effectiveness of the simulation.
Description
technical field [0001] The invention relates to the field of new energy power generation, in particular to a method and a device for simulating an energy storage system based on an equivalent model. Background technique [0002] With the continuous development of new energy technology, solar energy and wind energy have become the representatives of new energy with the advantages of clean, non-polluting and renewable. The emergence of large-scale energy storage systems not only promotes the development of photovoltaic and wind power generation, but also can cooperate with photovoltaic and wind turbines to achieve smooth output, peak shaving and valley filling, and tracking planned output, which increases the controllability of power generation and reduces The randomness and volatility of the power generation system are improved, and the grid-connected capability of wind and solar power generation is improved. However, when a large-scale battery energy storage system is runni...
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IPC IPC(8): H02J3/32
CPCH02J3/32H02J2203/20
Inventor 李相俊孙楠贾学翠王上行杨水丽马会萌毛海波李建林惠东刘超群何泽家
Owner CHINA ELECTRIC POWER RES INST