摘要
针对太阳能电池组件输出特性曲线的非线性特点以及传统的直接与蓄电池并联充电方式的缺点,本文进行了太阳能电池组件的最大功率点跟踪控制研究,并提出了采用变步长电压扰动观察的跟踪控制策略。由于充电系统中的蓄电池组为易损设备,因此,本文结合蓄电池的充放电特性曲线以及太阳能电源的输出特性,对蓄电池组进行了优化管理研究。在此基础上,设计了基于单片机JK3和脉宽调制芯片TL494的太阳能光伏充电系统,采用电压电流双闭环控制,有效改善了系统的跟踪效果。最后,在太阳能电池阵列模拟器上进行了太阳能电池组件的最大功率点跟踪的实验验证。实验结果证明上述控制策略具有良好的跟踪效果,有效提高了系统充电效率。
According to the nonlinear output characteristic of solar cell module and the direct parallel connection method, TMPPT control strategy of solar cell module is studied drawback of traditional a tracking control strategy is presented, which adopts variable voltage step disturbance and observation. As the batteries are the easy to be damaged devices in the charging system, the study on optimal management of the batteries is carried out, which considers the charging and discharging curve of the batteries and the output characteristic of the solar cell modules. According to above details, a photovohaic charging system was designed based on microprocessor JK3 and pulse width modulation chip TL494. The system adopts voltage and current double closed loop control to improve the tracking effect of the system. Finally, experiments on TMPPT of solar cell modules were carried out with solar cell array simulator. Experiment results verify that the proposed control strategy has good tracking effect and improves the charging efficiency obviously.
出处
《电子测量与仪器学报》
CSCD
2008年第3期11-15,共5页
Journal of Electronic Measurement and Instrumentation
基金
安徽省科技厅"十一五"科技攻关项目:家庭太阳能光伏电源的应用开发(编号:6022010)
关键词
太阳能电池
光伏充电系统
TMP胛
模拟器
solar cell, photovoltaic charging system, True Maximum Power Point Tracking （TMPPT）, simulator.
