Identification and Verification of Key Parameters for the Transient Synchronous Stability of Doubly - Fed Induction Generators Based on Trajectory Sensitivity Analysis

With the wide application of wind power generation, the problem of transient synchronous stability of doubly - fed induction generators (DFIGs) under grid faults has become increasingly prominent. This paper studies the transient synchronization process of DFIGs under grid faults based on the key parameter identification method of trajectory sensitivity analysis (TSA). By constructing a detailed nonlinear model of the doubly-fed wind turbine, the transient synchronization characteristics of DFIGs are revealed, and the key parameters affecting the system stability are identified using the TSA method. The trajectory sensitivity method can effectively quantify the impact of parameters on the system's dynamic behavior and is suitable for the stability analysis of high - order systems. The simulation results verify the effectiveness of the identified key parameters. The research of this paper provides new ideas for the transient synchronous stability analysis of DFIGs and a theoretical basis for optimizing control strategies, which has important engineering application value.