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Battery energy storage frequency modulation technology, do you really understand?

Battery energy storage frequency modulation technology, do you really understand?

2021-06-07

2018 has been a hot year for China's energy storage market. In the energy storage industry, the most popular market is undoubtedly the user-side energy storage market and the energy storage frequency modulation service market. 


On the one hand, the government continues to pay attention to and support the field of energy storage frequency modulation, and the participation of energy storage combined generator sets in power auxiliary services has begun to rise; On the other hand, the economy of energy storage assisted frequency modulation is much better than peak clipping and valley filling. 


At present, thermal power energy storage combined frequency modulation projects surge to more than 20, there is a spark that can start a prairie fire. In the future, the frequency modulation mode of "thermal power + energy storage" will appear more frequently.

From the perspective of radiation scope, the planned FM auxiliary service market covers two major regions in North China (Shanxi, Beijing, Tianjin and Tangshan) and Guangdong. At the same time, the regional market is also spreading rapidly from North China Power Grid to Mongolia-West Power Grid and China Southern Power Grid.


With the increase of users' demand for the FM auxiliary service market, the main body of investment and profit-sharing model are increasingly diversified. At present, fire storage joint frequency modulation projects have been carried out or landed in Jiangsu, Shandong, Inner Mongolia (part of North China Power Grid), Guizhou, Xinjiang, Guangdong, Hunan and other provinces.


Do you really understand the hot battery energy storage frequency modulation technology?

It is well known that the frequency stability of a power system is determined by the balance of energy supply and demand. In the energy structure of the traditional power system, the short-term energy balance is mainly regulated by the traditional units (including hydropower, thermal power, etc.) by responding to the AGC signal.


At present, there is still a gap between the AGC frequency modulation performance of domestic thermal power units and the regulation expectation of the power grid.


With the adjustment of industrial structure, the proportion of wind, light, and other new energy sources connected to the power grid is gradually increasing, the equivalent load of the power system changes sharply in the short term, and the demand for frequency modulation of the power grid increases sharply. Battery energy storage technology, as a kind of high-quality frequency modulation resources, can effectively assist frequency modulation, and significantly improve the power system regulation ability and operational flexibility.

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