用于无线传感器节点的太阳能MPPT算法研究

摘要

In order for wireless sensor nodes to make efficient use of the energy provided by solar cells, a fuzzy sliding mode control algorithm is designed to track the maximum power point of solar cells. The advantage of this algorithm is that its sliding mode is absolutely self-adaptive to the outside interference of the solar power supply system. The error of the output power used by system to construct the sliding mode function and to blur it, and then the rapid, precise control of the solar cell's nonlinear system is realized by using the fuzzy approximation method, and the smoothness of the tracking is increased. Comparison with the sliding mode control algorithm show that the algorithm has fast tracking speed and good stability, which will enable solar panels to maximize their benefits and increase life cycles for nodes.%为使无线传感器节点能够高效地利用太阳能电池供应的能量,设计一款模糊滑模控制算法追踪太阳能电池的最大功率点.该算法的优势在于其滑动模态对加给太阳能供电系统的外界干扰具有自适应性.系统首先利用输出功率的误差构建滑模函数并且对其模糊化,再利用模糊逼近方法实现对太阳能电池非线性系统的快速、稳定控制,并增大跟踪的平滑性.与单独的滑模控制算法对比和仿真实验均表明,该算法的追踪速度快、稳定性好,这将使太阳能电池板发挥最大效益并为节点增加生命周期.