摘要
研究了光伏阵列的非线性功率输出特性,讨论了几种常用的最大功率点跟踪(MPPT)的控制方法,在此基础上设计了基于模糊控制的自适应PID控制器,该模糊控制器能快速响应外界环境的变化,使光伏发电系统始终工作在最大功率点(MPP);同时PID控制能有效地消除在MPP附近的振荡现象,提高系统的稳定性。在Matlab软件的Simulink下进行系统的建模和仿真,结果表明,该方法能够快速准确地跟踪MPP的变化,有着优越的稳态性能。
Study was made on non-linear power output characteristics of photovoltaic array. Discussion was made to several kinds of frequently used maximum power point tracking （MPPT） control methods. On the basis of this, the fuzzy adaptive PID controller was designed. The fuzzy controller could quickly response to the changes of outside environment, keeping the photovoltaic genera- tion system working at maximum power point （MPP） all the time. In the meantime the PID control can effectively eliminate the power oscillation around MPP to raise stability of the system. Software modeling and simulation were carried out in simulink of Matlab. The result shows that the method can quickly and correctly track changes of MPP with excellent stability performance.
出处
《电工电气》
2010年第11期35-39,55,共6页
Electrotechnics Electric
