二重积分滑模控制最大功率点的研究

Study about Maximum Power Point Tracking of the Double Integral Sliding Mode Control

针对最大功率点滑模控制器中存在跟踪电压误差、抖震和瞬态响应缓慢等问题,在一个独立光伏系统中,提出了一种新型的基于双积分滑模控制最大功率点跟踪,为此二重积分滑模控制器采用跟踪电流误差项的滑动面来消除稳态误差。实验结果表明:与滑模控制器和积分滑模控制器控制过程相比较,采用二重积分滑模控制器极大地削减了输出电压稳态抖震,使输出电压值更为精确。在光伏系统中,使用MATLAB仿真软件可以有效的验证所提出的二重积分滑模控制器。

This paper proposes a new maximum power point tracker for a stand - alone photo - voltaic system u- sing the double integral sliding mode controller. Since there still exist some problems about the sliding mode con- troller of maximum power point tracker, such as tracking voltage error, chattering shaking and slow transient re- sponse, the double integral sliding mode controller used a sliding surface tracking current error term to eliminate the steady state error. The results show that： compared with the sliding mode controller and integral sliding mode controller of control process, the use of double integral sliding mode controller can greatly reduce the steady - state output voltage of chattering shaking for more accurate output voltage. In photo - voltaic systems, the use of MATLAB simulation software can effectively verify the proposed double integral sliding mode controller.