Control method for large-scale energy storage battery to participate in frequency modulation of multi-region power system

The invention discloses a control method for a large-scale energy storage battery to participate in frequency modulation of a multi-region power system. The method comprises the following steps: establishing a frequency modulation optimization target model of the multi-region power system under the installation constraint of the energy storage battery, inputting the adjustment power of the energy storage battery into the model, outputting frequency deviation and tie line power deviation, and performing frequency modulation control on the multi-region power system. According to the method, the energy storage battery capacity is distributed to different areas based on the optimization model of the minimization area control error, the energy storage battery control parameters of the different areas are optimized, and energy storage battery cluster regulation and control under a novel electric power system with new energy as a main body can be conveniently guided. According to the method, the energy storage batte