Performance evaluation of flywheel energy storage participating in primary frequency regulation of power grid

The thoroughness of the primary frequency modulation function is a critical measure of grid security for power plants connected to the grid and plays an essential role in maintaining grid frequency stability. This paper establishes a simulation model for flywheel energy storage to take part in primary frequency modulation and creates a performance evaluation index system for primary frequency modulation that encompasses detailed indicators such as response delay time, stability time, frequency regulation response amplification, rotational speed inequality, and frequency regulation contribution index. Utilizing the entropy weight method and the osculating value method, the performance of flywheel storage involved in primary frequency modulation under various frequency regulation modes is thoroughly assessed.