Wind Power Plant Dispatch for Power Grid Frequency Dynamics Improvement: A Surrogate Model-Based Method

Abstract

Frequency regulation support (FRS) from wind power plants (WPPs) is critical for enhancing the frequency stability of modern power systems. To preserve WPP FRS capabilities, it is essential to account for the frequency response dynamics of each wind turbine generator (WTG) in the WPP-level dispatch process. However, incorporating these dynamics into dispatch algorithms is complex due to the intricate WTG control strategies required for varying wind conditions. To overcome this challenge, this paper first examines detailed WTG dynamics models to capture key frequency response characteristics. A surrogate modeling approach is then proposed, providing an analytical model that accurately represents WTG FRS dynamics. Leveraging this surrogate model, a short-term WPP dispatch framework is developed, ensuring both precise dispatch command tracking and the preservation of FRS capabilities. Additionally, an efficient solving strategy is introduced to enhance the computational performance of the dispatch model. Case studies demonstrate the effectiveness and robustness of the proposed method, offering a significant advancement in integrating WPPs into frequency regulation frameworks.