A Coordinated Optimal Strategy for Voltage and Reactive Power Control with Adaptive Amplitude Limiter Based on Flexible Excitation System

The flexible excitation system (FES) is a kind of novel with two channels for damping control. Besides the basic functions traditional systems, systems can provide reactive power support terminal voltage, and large-capacity FES improve voltage stability power-angle synchronous generator units. However, increase in capacity complication control objectives, difficulty controller design will be increased. randomness fluctuation new energy resources such as photovoltaic wind turbines may cause disturbance fault to system, which requires coordinated strategy achieve angle. In this paper, characteristics are analyzed, mathematic model single machine infinite bus (SMIB) based on derived. decoupling stator rotor proposed according optimal objectives stability, linear (LOEC) adopted adaptive amplitude limiter (AAL) determined by fuzzy rules. MATLAB/Simulink platform established results verify superiority LOEC + AAL large working conditions, showed better robustness. provides an effective solution industrial application performance improvement FES.