光伏系统最大功率跟踪技术的研究

Study of maximum power point tracking technologies for photovoltaic power systems

基于传统的滑膜控制算法,本文采用一种改进的指数趋近律方法,来实现最大功率跟踪,使得控制输出变量可以为连续变量,再通过调制器得到开关管的控制信号,实现控制,以弥补传统方法的参数灵敏度、适用范围受限制等方面的缺陷。通过对传统算法和改进算法的仿真比较,得出了改进的滑模控制法能够快速地跟踪最大功率点,振荡幅度较小,鲁棒性较好。

Based on the traditional synovial control algorithm, this paper uses an improved index reaching law approach to achieve maximum power point tracking, so that the control output variables as continuous variables can then be controlled by a switch signal modulator to achieve control to make up the traditional methods of parameter sensitivity, scope and other aspects of the restricted defects. By comparing the traditional simulation algorithm and improved algorithm, the improved algorithm can quickly track the maximum power point, the oscillation amplitude is small, better robustness.