模糊控制在光伏水泵灌溉系统中的应用

摘要

在水泵灌溉系统中利用太阳能作为动力,可解决边远地区能源动力缺乏难题.考虑到光伏电池的输出特性随负载及外界环境的变化而变化,在灌溉器的控制模块中引入模糊控制技术.通过DC/DC变换器通流率的变化量随模糊规则可变的控制,使太阳电池阵列始终处于最大功率输出状态,提高光伏器件的效能、获得最大扬水量.仿真实验结果显示,该系统具有比用功率比较法捕捉太阳电池阵列最大功率点更快且脉动小的特点.%The application of solar energy taken as a driving foece in water pump irrigation systems can make up the lack of energy source in remote areas. The fuzzy control technology is introduced into the control modules of irrigation systems in consideration of the variation of PV module output characteristics with module temperature, sunlight intensity and loads. By controlling the variation of flow rate of DC/DC converter with the fuzzy rules, the solar cell array is always kept in the state of maximum power output so as to improve the efficiency of PV modules and obtain the maximum irrigation amount. The experimental results show that the fuzzy control technology can catch the maximum power point of solar cell array more rapidly and has less impulse than the power comparative method