1. Fujian Torch Electron Technology Co., Ltd, Quanzhou, Fujian 362055; 2. Quanzhou Institute of Equipment Manufacturing, Haixi Institutes, Chinese Academy of Sciences, Quanzhou, Fujian 362216; 3. National and Local Joint Engineering Research Center for Electrical Drives and Power Electronics, Quanzhou, Fujian 362216
Abstract：Aiming at the deficiency of parameter sensitivity of existing model predictive control, and the problem of poor adaptability of fixed gain of traditional disturbance observer for LCL inverters control, a model-free predictive power control strategy based on adaptive linear extended state observer is proposed. Firstly, an ultra-local model based on power prediction is established to replace the traditional method that relies on accurate physical modeling, which can effectively reduce the sensitivity of the control system to the circuit parameters. Secondly, a linear extended state observer with adaptive bandwidth adjustment function is introduced to optimize the response speed of the observer in real time and compensate the dynamic changes of the system in real time, thus improving the control accuracy. An experimental test platform is built to carry out comparative analysis. Experimental results show that the proposed method can reduce the total harmonic current and enhance the dynamic response speed.
2025, Vol. 26 
