Equivalent Modeling and Typical Scenario Screening of Wind Farms for the Stability Control Strategy Verification

Abstract

This paper proposes a novel equivalent modeling framework for wind farms, specifically designed for the ``grid simulation with physical security and stability control device'' co-simulation environment. As the scope of stability control expands from the farm level to individual feeders and turbines, conventional equivalent models are inadequate for validating advanced strategies. To address this issue, a framework is proposed that integrates the architecture and operational principles of security and stability control systems. Within the scope of centralized renewable energy transmission grids, a technical route for equivalent modeling of wind farms that incorporates stability control actions is presented, adopting a five-machine equivalent method. Furthermore, a typical scenario selection method based on two-dimensional Kernel Density Estimation (2D-KDE) is developed, utilizing the active power recovery characteristics of the equivalent model. The efficacy of the proposed method is validated on an extended IEEE 10-machine 39-bus system.