（毕业论文）太阳能功率优化器升压系统的研究与实现.docx

I 摘要近年来, 我们现在正广泛使用的石油、天然气还有煤炭等这些不可再生资源的存储量正在逐渐减少并且使用这些资源所带来的环境污染现象日益严重。清洁的可再生的太阳能成为人们关注的焦点。但是,如何提高太阳能光伏发电系统的转换效率成为一项重要挑战。最大功率点跟踪法,从本质上来讲就是在太阳能电池板和负载之间加入最大功率点跟踪器,就可以使太阳能电池板时刻保持最大功率输出。本文首先介绍了几种传统的 MPPT 算法,对这些算法的原理和特点进行了分析, 进而提出了一个改进型扰动观察法,该算法不仅可以保留了传统扰动观察法的优点还可以有效的解决传统扰动观察法的缺陷,可以实现高效稳定的跟踪。本系统对升压式 DC-DC 变换器进行了改进,采用以 2-ph 交错式升压变换器为主电路,其后面所接的 H 桥 LLC 谐振级可以使电路中的初级和次级之间完全隔离。 TMS320F28035 微控制器通过脉宽调制( PWM )来改变占空比,从而使内外电路实现匹配,最终就可以使太阳能电池板输出的功率达到最大。关键词: MPPT 改进型扰动观察法 TMS320F28035 2-ph 交错式升压变换器 II Research and Implementation of the Solar Power Optimizer Booster System ABSTRACT In recent years, we are now widespread use of these non-renewable resources such as oil, natural gas and coal storage is gradually reduced, and the phenomenon of environmental pollution brought by the use of these resources is ing more and more serious. Therefore, clean and renewable solar energy has e the focus of attention. However, how to improve the conversion efficiency of solar photovoltaic power generation system has e a major challenge. Maximum Power Point Tracking, essentially, that is between the solar panels and the load added maximum power point tracker, then you can make solar panels keep the maximum power output. This paper introduces several traditional MPPT algorithms, the principles and characteristics of these algorithms are analyzed, and then I put forward an improved Perturbation and Observation method, the algorithm can not only retain the advantages of the traditional Perturbation and Observation method, also can effectively solve the defects of the traditional method, so as to realize efficient and stable tracking. The boost DC-DC converter is improved in this system. The main circuit is 2-ph interleaved boost converter, and the H bridge LLC resonant stage after it pletely isolated between the primary and the secondary in the circuit. The TMS320F28035 microcontroller changes the duty cycle by the Pulse Width Modulation (PWM), so as to realize the matching between inner circuit and o