Configuration method of energy storage system considering grid frequency support demand under high wind power penetration

A configuration method of energy storage system considering the grid frequency support demand under high wind power penetration is proposed. The frequency change rate and the frequency deviation are taken as the restricted conditions to establish the relationship between the maximum power increment that the new energy system can withstand and the known parameters such as equivalent inertia constant, adjustment coefficient, wind power permeability, and so on. The capacity and control parameters of the energy storage system under the control strategy of the third-order virtual synchronous generator are quantitatively configured to improve the ability of different wind power penetration system for absorbing unbalanced power. Taking the unit power regulation contributed by the energy storage system as a reference, the frequency response contribution, frequency modulation output ratio and output power characteristics of the configuration method are described and analyzed when different power increments are generated. The simulative results show that the energy storage system under this configuration method has strong controllability, which can provide the active power regulation required by the grid more accurately, so as to effectively improve the wind power grid environment. © 2021, Electric Power Automation Equipment Press. All right reserved.