基于环境因素与模糊识别的太阳自动跟踪控制策略  

Solar auto-tracking control strategy based on environmental factors and fuzzy identification

作　　者：王林军[1,2] 门静[1,2] 许立晓 张东[2] 邓煜[1,2] 吕耀平[1,2] 陈艳娟[1,2] 

机构地区：[1]兰州理工大学机电工程学院,兰州730050 [2]兰州理工大学西部能源与环境研究中心,兰州730050

出　　处：《农业工程学报》2015年第9期195-200,共6页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金(51166008)

摘　　要：提高太阳自动跟踪控制系统的运行稳定性和跟踪精度,需要考虑外界环境因素对系统的影响及选择适当的跟踪方式。目前,太阳自动跟踪系统普遍采用光电跟踪和程序跟踪相结合的混合跟踪方式,将光强值与光强阈值的差值作为切换跟踪方式的依据。当光强值趋近光强阈值时,会造成跟踪方式频繁的切换,该文针对该问题,以外界光强大小、光强变化和风速大小为特征目标,利用MATLAB中的模糊识别方法归类总结了天气情况和系统运行情况,建立了一种基于环境因素判断的模糊识别系统,通过仿真验证,得到了天气类型和系统的运行情况,仿真结果完全符合推理条件,并与计算所得结果基本一致。该研究为太阳自动跟踪系统的启停和跟踪方式的切换提供了可靠的理论支持,且具有较高的实用性和可行性。Exploring and making full use of new energy resources can solve the problem of the energy shortage and environmental pollution, so many people focus on the use of solar energy which has the advantages of cleanliness, reuse, and economy, etc. Solar power, as the ideal use of solar energy, is the generation of electricity from sunlight. Either PV generation system or solar thermal power generation system have great extensive use, the formal usually use solar cells as the device to convert solar energy directly into electricity by the photovoltaic effect, and photovoltaic technology can＆nbsp;meet the demand of different uses which need power supply by solar cells in different sizes, The latter has large scale, it focuses the solar energy to boil water and the heat energy is used to provide power. The solar thermal power generation system can be divided into three types： dish solar thermal power generation, groove type thermal power generation, and tower solar thermal power generation. Dish solar thermal power generation has higher efficiency. Considering that the disadvantages of solar energy are ever-changing solar radiation direction and unstable solar energy, dish solar thermal power generation uses an auto-tracking system to improve the utilization ratio of solar energy for an solar automatic tracking system can keep the incident sunlight parallel to the collector. A dish solar thermal power generation system works out of doors, environmental factors have a great influence on the system’s running stability and tracking accuracy, and affects the choice of tracking mode. The auto-tracking modes can be classified into：program tracking mode, photoelectric tracking mode, and hybrid tracking mode. Program tracking mode uses a computer to calculate the sun’s azimuth and latitude, can work under all-weather condition, and has high adaptability, but it has a cumulative error in the tracking process. The photoelectric mode has higher tracking accuracy for it has feedback information. It works well in the sunny d

关 键 词：太阳能 跟踪 模糊系统 环境因素 模糊推理规则 MATLAB 光电传感器 

分 类 号：TM615[电气工程—电力系统及自动化]