A Control Strategy for Electric Vehicles Participating in Frequency Regulation Considering User Demand and Battery Longevity

Large-scale electric vehicle access provides a strong guarantee for power grid frequency regulation, but less consideration is given to the single-vehicle battery differences and different needs of users in the frequency regulation process. This paper addresses the above problems, considers the communication delay, and designs an auxiliary frequency regulation control method for electric vehicles based on vehicle information feedback. Firstly, the operation of the vehicle is divided according to the vehicle information. Secondly, considering the communication delay, the high-frequency component of the frequency regulation signal is allocated to the electric vehicle through a filter. Besides, the auxiliary frequency regulation of the electric vehicle is realized by using capacity allocation and adaptive sag control. Finally, the simulation verification is carried out by taking the three-area interconnected power system connected to the grid of wind power generation as an example. The results show that the designed frequency regulation control method effectively suppresses the fluctuation of frequency deviation when wind power is gridconnected while taking into account the vehicle’s individual information, and also has a significant effect on suppressing the frequency deviation under the random perturbation of load.