基于改进电导增量法的光伏发电系统MPPT控制研究

Research of Photovoltaic System MPPT Control Based on Improved Conductance Increment Method

提出了一种改进的电导增量法,该方法在远离最大功率点时采用在线固定参数法,而在最大功率点处采用电导增量法.通过仿真试验证明,该方法可以根据外部环境的变化,快速、准确地跟踪到最大功率点,并能有效地减少最大功率点处的功率振荡现象.

In order to quickly and stably track to the maximum power point of the photovoltaic cell, a photovoltaic cell maximum power point tracking method is put forword which based on Conductance Increments method on the photovoltaic power generation system. This method uses Constant Parameter method away from the maximum power point, uses Conductance Increment method at the maximum power point. Through simu- lation studies, this method can quickly and accurately find the maximum power point according to the rapid changes in the external environment, and reduce the power oscillation phenomeno at the maximum power point, has a good practicability.