Coordinated self-tuning frequency support control strategy for wind turbine and energy storage battery against time-varying operating conditions
Year: 2025
Type: article
Abstract: Constrained by the rotor speed limit of Wind Turbines (WTs), high wind power penetration grids present the phenomenon of secondary drop in frequency regulation, and the steady-state deviation is rather significant. While Energy Storage Batteries (ESB) installed in wind farms can provide long-term frequency regulation services, the coordination mechanisms between ESB and WTs remain underexplored. This paper investigates the root cause of secondary frequency drop induced by insufficient rotor kinetic energy reserves. By analyzing the propagation of frequency disturbance signals through WT and ESB control loops, a coordinated control framework integrating DC-link ESB with WTs is developed to mitigate secondary frequency drop from an energy-balance perspective. Furthermore, to address the critical need for matching source-side support capabilities with system frequency regulation demands under time-varying operating conditions, this paper proposes a self-tuning droop-inertia parameter control method. This method dynamically adapts to operating conditions, thereby enhancing the coordinated frequency regulation capacity of WTs and ESB across diverse source-side states. Simulation results indicate that the proposed method enhances the frequency nadir, alleviating the secondary frequency drop and contributing to the secure operation of the system.
Source: Journal of Energy Storage
Authors: Zenghui Li, Qi Wang, Yifu Luo, Feiyu Chen, Xiangqun Wang
Language: English
Topic: Wind Turbine Control Systems
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,560
OpenAlex ID: W4415316542