PLC太阳能跟踪控制系统的设计+梯形图
毕业论文关键词：PLC；太阳能自动跟踪；光电跟踪；光敏传感器
Abstract At present, the energy shortage is a major problem facing the world, so theresearch and development of new clean energy is imminent. Development of solarenergy as a promising new clean energy, and can be regenerated, which makes it thescientists has been highly valued.Theoretical studies show that the energy absorptionrate tracking solar power generation unit 37.8% higher than fixed solar powergeneration device, the study of solar tracking devices become the new trend ofdomestic and foreign scholars [1].The main topic Application PLC (programmable logic controller) solar panelTwo-axis automatic tracking control, focus on the software design of the system.There are two ways to keep track of solar energy: one is the optical tracking, the otheris a Japanese visual trajectory tracking. This design uses a photoelectric tracking, itcan automatically according to the direction of sunlight to regulate the intensity of thesolar panel orientation of the solar panel to maximize solar energy received. The mainoptical tracking control process are: the light-sensitive sensor to collect light intensitysignal, enlargement processing, the faint light intensity signal into a voltage signalstronger, through digital to analog conversion, input to the internal PLC, PLC bysignal processing, rotation of the motor control.
Keywords: PLC； Automatic solar tracking；Optical tracking；Light sensors
目录
第一章 绪论1
1.1 研究背景1
1.2 国内外研究现状2
1.2.1 单轴跟踪装置2
1.2.2 双轴跟踪装置3
1.3 研究意义3
1.4 本文研究的主要内容4
第二章 光伏发电系统的组成及原理6
2.1 光伏发电系统的概述6
2.2 光伏电池的分类与基本原理8
2.2.1 光伏电池的分类8
2.2.2 光伏电池发电的基本原理9
2.3 跟踪方式的分类和对比9
2.3.1 单轴跟踪方式9
2.3.2 双轴跟踪方式10
2. 4 小结10
第三章 跟踪系统的总体设计12
3.1 太阳能跟踪系统的控制方法12
3.2 跟踪方法的比较和确定12
3.2.1 视日运动轨迹跟踪的原理12
3.2.2 光电跟踪的原理12
3.3 系统控制方案确定13
3.4 跟踪装置介绍13
3.5 RS485 通讯14
3. 6 小结14
第四章 系统硬件设计15
4. 1 光强强弱判断电路15
4. 2 太阳方位跟踪电路16
4.3 A/D 转换模块 EM23118
4.4 PLC 的 I/O 模块18
4.5 电机的驱动19
4.6 小结19
第五章 系统软件设计20
5.1 系统设计流程图20
5.2 系统实时时钟的设置与读取20
5.3 定时设置21