太阳能逆变提灌系统的设计.doc

太阳能逆变提灌系统的设计 学生姓名： 学生学号： 院（系）： 电气信息工程学院 年级专业：电子信息工程 指导教师： 助理指导教师： 二〇一五年五月  摘 要 20世纪70年代后，传统的燃料能源正在一天天减少，这时全世界都把目光投向了可再生能源，这之中太阳能以其独有的优势而成为人们重视的焦点。太阳能光伏发电技术可以用于任何需要电源的场合，上至航天器，下至家用电源，大到兆瓦级电站，小到玩具，光伏电源无处不在。而提灌系统在农田灌溉、城镇绿化、居民生活、生态环境等生产生活中起着重要的作用，并且在一些电力缺乏地区人可有效解决人畜饮水困难及灌溉用水不足的问题。太阳能逆变提灌系统正是由太阳能发电系统及提灌系统组成。随着新型清洁能源的不断发展和利用，太阳能逆变提灌系统的发展前景将十分广阔。 整个系统由太阳能电池板、蓄电池、逆变器、控制器和水泵构成。其中逆变器是整个系统的关键部分，在逆变器环节采用推挽电路、频升压电路和电路。在PWM波形产生环节采用脉宽调制芯片SG3525为核心。最后将220V、50Hz的交流电输出给一个用额定功率为8W的水泵代替提灌系统的大功率水泵，实现抽水功能，模拟提灌系统实际情况下的大扬程抽水功能关键词 光伏发电，逆变器，SG3525  ABSTRACT In twentieth Century, after 70 years, the traditional fuel energy is reducing day by day, the whole world is focused on renewable energy, the solar energy with its unique advantages and become the focus of attention. Solar photovoltaic power generation technology can be used for any power supply, to the spacecraft, to household power, large megawatt power plant, small toys, photovoltaic power everywhere. The irrigation in irrigation system, urban greening, residents living, ecological environment, production and life plays an important role, and in some areas the lack of power can effectively solve the problem of drinking water and irrigation water shortage. The solar inverter system is composed of irrigation and irrigation system of solar power generation system. With the continuous development of new clean energy and utilization, development prospect of solar inverter irrigation system will be very broad. The whole system consists of solar panel, battery, inverter, controller and water pump. The inverter is the key part of the whole system, the push-pull circuit, high-frequency step-up circuit and full bridge inverter circuit in inverter. Link generated by pulse width modulation chip SG3525 as the core in the PWM waveform. At the same time, the design and battery charging control, through the microcontroller to achieve the battery overcharge pro