Research on Active Disturbance Rejection Control for Load Coordination System of Supercritical Thermal Power Units

Enhance the flexibility and adaptability of peak shaving and frequency regulation for thermal power units is a crucial for the stable operation of new energy generation and power grids. This paper proposes an Improved Linear Active Disturbance Rejection Control (ILADRC) method for the load coordination system of thermal power units to improve stability and flexibility under multi-condition peak shaving modes. Bandwidth parameterization is employed to reduce the complexity of ILADRC parameter tuning. A feedforward compensation mechanism is introduced to overcome the impact of large delays on the boiler side on dynamic performance. Combined with an extended state observer (ESO) to estimate and compensate for internal and external total disturbances in real-time. Compared with PID control, ILADRC demonstrates certain advantages in dynamic response speed, disturbance rejection capability, and crossworking-condition adaptability, significantly enhancing the system's applicability across multiple operating conditions and robustness under varying conditions.