针对目前光伏发电研究中传统最大功率跟踪(Maximum Power Point Tracking,MPPT)控制算法存在受外界环境变化大而不能实现最大功率跟踪的不足,提出了一种基于RMPPT/PID双模控制的光伏发电MPPT研究方法。该方法能够实时响应外界环境变化,同传统方法相比,可以有效的缩短追踪时间,同时PID自适应控制的加入可减少输出功率附近的功率振荡。系统仿真表明,该控制方法在外界环境变化时能快速实现最大功率跟踪,并有效消除最大功率点处的震荡,整个系统运行可靠性高,响应速度快。
英文摘要:
In view of the shortcomings of the traditional maximum power point tracking (MPPT) control algorithm in current photovoltaic power generation research, which is unable to achieve maximum power tracking because of the great changes in the external environment, a research method of photovoltaic power generation MPPT based on RMPPT/PID dual-mode control is proposed in this paper. This method can respond to the external environment in real time, and can effectively shorten the tracking time compared with the traditional methods. Simultaneous interpreting of the PID adaptive control can reduce the power oscillation near the output power. System simulation shows that the control method can quickly realize maximum power tracking when the external environment changes, and effectively eliminate the oscillation at the maximum power point. The whole system has high reliability and fast response speed.