摘要光伏发电是当前最有发展前景的可再生能源技术之一。提高光伏发电的技术水平对改善能源结构，构建能源安全体系具有重大意义。本论文以太阳能发电系统为研究对象，以最大限度利用太阳能为主要目标，开展了太阳能光伏发电系统最大功率点跟踪控制的理论和试验研究[17]。65008

最大功率点跟踪(MPPT)方法是光伏发电系统中提高系统效率的重要手段。本文在系统研究光伏阵列输出特性的基础上，运用 Matlab/Simulink 建立光伏阵列仿真模型，分析对比了多种常见最大功率点跟踪（MPPT）的方法和原理。在此基础上，针对固定步长扰动观察法存在的问题，研究了改进的自适应变步长思想[24]。并对此算法运用Matlab/Simulink 进行仿真。仿真结果表明：改进的变步长扰动观察 MPPT 方法能够稳定、高效地跟踪光伏阵列最大功率点；同时，在日照强度、环境温度等系统参数扰动的情况下，能快速寻找新的工作点，保持系统稳定，表现出很好的动态特性。在光伏发电系统的设计中，具有重要的理论意义和实用价值。

毕业论文关键词   光伏电池   Matlab/Simulink   MPPT  扰动观察法

毕业设计说明书（论文）中文摘要

 毕业设计说明书（论文）外文摘要

Title  The Technology Research of Maximum Power Point    Tracking of Photovoltaic Power Generation System  Based on Perturbation and Observation Method                            

Abstract

Photovoltaic power generation is currently the most promising renewable energy technologies. Improve the level of technology of photovoltaic power generation to improve the energy structure, building energy security system is of great significance. In this thesis, solar power systems for the study, in order to maximize the use of solar energy as the main objective, to carry out a solar photovoltaic system maximum power point tracking control of theoretical and experimental research .

Maximum Power Point Tracking (MPPT) method for photovoltaic systems an important means to improve system efficiency. This paper studies the PV array output characteristics of the system, based on the use of Matlab / Simulink simulation model to establish the PV array, analysis and comparison of a variety of common maximum power point tracking (MPPT) methods and principles. On this basis, for a fixed-step problems interfere with observation method to study the improved adaptive variable step thinking . And this algorithm uses Matlab / Simulink simulation. Simulation results show that: the improved variable step size MPPT method can interfere with observation stable and efficient tracking photovoltaic array maximum power point; Meanwhile, in the sunshine intensity, ambient temperature and other system parameters perturbations in the case, can quickly find a new operating point, keeping the system is stable, showing good dynamic characteristics. In the design of photovoltaic systems has important theoretical significance and practical value.

Keywords  Photovoltaic array  Matlab / Simulink  MPPT P&O

目   次  

1 绪论 1

1.1  光伏发电技术 1

1.2  课题国内外研究现状 1

2 光伏电池 1

2.1  光伏电池的数学模型 1

2.2光伏电池的电气特性 1

2.3  光伏电池的建模仿真及电气特性验证