课程设计 独立光伏系统中蓄电池充放电控制器的设计.doc

独立光伏系统中蓄电池充放电控制器的设计
目录
摘要 2
4
§ 4
§ 4
§ 5
二、太阳能光伏发电系统 6
§ 6
§ 6
7
8
9
§ 9
9
10
10
11
11
12
§ 16
三、独立运行光伏发电系统控制器的研究与设计 17
§ 17
§ 17
§ 19
§ 21
四、独立光伏发电系统中蓄电池充放电控制器的设计 23
§ 23
§ 26
五、本课题的结论、意义及展望 29
参考文献 29
摘要
本文首先介绍了光伏发电产业的现状,接着介绍了光伏系统的基本组成,基
本原理,其中对太阳能电池的特性,蓄电池的特性,及光伏系统的配置分别进行
了讨论。然后探讨了光伏系统的一些关键技术,特别是蓄电池的监控技术。对蓄
电池的监控技术的关键是蓄电池荷电状态的检测,本文探讨了二三种检测方法:一
是基于蓄电池在线电压检测蓄电池荷电状态;二是基于蓄电池稳态开路电压检测
蓄电池荷电状态;三是公式法。本文还从理论上探讨了光伏系统控制器应具有的
功能:对蓄电池充放电的控制,对太阳方位和高度的跟踪,对太阳能电池最大功
率点的跟踪。
在此基础上介绍了研制的两种小型简单的光伏系统控制器。两种小型简单的光伏系统控制状态,另一个是通过检测蓄电池的开路电压来判断蓄电池的荷电状态,这两个控制器都是用871pc767单片机实现的。
关键词:光伏系统、电池监控、太阳能灯
Abstract
The current situation of photovoltaic systems(pv systems)is introduced at first,
and then basic concepts,theories,ponents of PV systems are discussed in this
papeE Key technology of PV system is checked,especially methods of battery
monitoring are monitoring methods of charging state are presented:
the method based on battery on—line voltage monitonng,the method based on battery
off-line voltage monitoring and the method based on formulas,The functions which
PV system controllers need to have are discussed in theory too,such as controlling of
charging and discharging,adaptation of orientation and position of solar cell,
maximum power point tracking(MPPT).On the basis of the above discussed methods,
three PV system controllers are of the three are orientated towards
simple and low—cost applications,but the third one based OR ARM core processors and
uC/OS—II embedded operating system is plex and
contr01 munication can transfer d