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1 Bulletin of the Polish Academy of Sciences. Technical Sciences

1 2024

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Simulation study of flywheel energy storage assisted coal-fired unit frequency regulation

Song Shunyi, Qiao Tianshu, Zhang Rui, Liang Shuangyin, Liu Yibing

Bulletin of the Polish Academy of Sciences. Technical Sciences

2024

Vol. 72, nr 6

art. no. e151951

With the increasing proportion of renewable energy power generation, its accompanying intermittency and volatility problems are becoming increasingly prominent, and the frequency fluctuation of the power system is becoming increasingly severe. Participation in frequency regulation services can be economically rewarding for generating units. The flywheel energy storage system can effectively improve the frequency regulation capability of coal-fired units. In this paper, the improvement of the FM capability of coal-fired units in the operation of a two-area interconnected power system containing wind power is investigated, and a model of a two-area interconnected power system comprising a turbine generator, wind power, and flywheel energy storage is established. The enhancement of the FM capability of coal-fired units by adding a flywheel energy storage system is analyzed. The simulation results show that adding the flywheel energy storage system improves the FM capability of the coal-fired unit to a considerable extent, and the coal-fired unit can decide the flywheel capacity it needs to be equipped with through detailed economic calculations.