Adaptive Coordinated Control of Fault Voltage Ride-through for Wind Turbine Based on Energy Storage

In order to solve the problem of required large energy storage capacity during wind turbine voltage ride-through and ensure the grid-connected stability of wind turbines, an adaptive coordination control method of voltage ride-through for wind turbines based on energy storage is proposed. The proposed control method configures the energy storage at the point of common coupling. According to the power margin of energy storage and rotor adjustment power, an adaptive coordination coefficient is introduced, and the compensation power of energy storage and adjustment power of the rotor inertia are distributed in real time. Thus, the coordination between the wind turbine and energy storage can be implemented. During the fault, the rotor can respond in time and adjust the speed within the allowable range, which is beneficial for the wind turbine to withstand long-term continuous voltage ride-through. Meanwhile, compared with the non-coordinated control and the fixed proportional coefficient coordinated control, the proposed control method can further reduce the required compensation power and capacity of the energy storage during the fault. Finally, the doubly-fed induction generator model and permanent magnetic synchronous generator model are built, and the comparative simulation of continuous voltage ride-through is carried out. Meanwhile, a hardware-in-loop experimental platform is built for the experimental verification. Simulation and experimental results demonstrate the effectiveness of the proposed adaptive coordinated control strategy. © 2023 Automation of Electric Power Systems Press. All rights reserved.