Control system of renewable energy connected grid based on the auto-disturbances rejection control technology
基于自抗扰技术的光伏发电并网控制系统

Renewable energy generation system connected to the single-phase grid is nonlinear.Affected by grid and environment,the strong disturbance exists.To deal with this characteristics,the auto-disturbances rejection control(ADRC) is used to improve the system's performance.Based on ADRC extended state observer(ESO) to get the model uncertainty and external interference of the system,the system shows good adaptability to noise and model uncertainty.A nonlinear exponential function is applied to ESO and nonlinear state error feedback(NLSEF) controller,and it makes the system realize easier operation.Simulation tests show that the system has good robustness and dynamic performance and the system is feasible.