摘要
光伏模组常受阴影影响处于失配运行状态,考虑到大部分阴影的持续时间较短,提出采用并联超级电容的策略进行补偿。在建立带并联电容的光伏模组等效电路的微分方程模型基础上,分析并联模组的工作特性和电压功率变化特性。从补偿方式和工作特性两方面,对比电容补偿方法和传统二极管补偿方法,结果显示在短时阴影情况下电容补偿方法可以更有效地改善光伏系统的输出特性,提高输出电压和稳定输出功率。探讨超级电容补偿在实际应用中所需要解决的关键问题,定义最佳工作区间和维持时间的概念,提出得到超级电容与维持时间的匹配关系的方法。
Photovoltaic modules may operate in mismatch mode because of partial shadow. Because the duration of partial shadow is normally short,it is proposed to apply the parallel super capacitor to power compensation. The differential equation model of photovoltaic module with parallel super capacitor is established,based on which,its operational features and voltage/power variation characteristics are analyzed. The contrast results between the proposed super capacitor compensation method and traditional diode compensation method in compensation mode and operational features show that,the super capacitor compensation method can improve the characteristics of the photovoltaic system,increase the output voltage and stable the output power more effectively under short-time partial shadows. Its key issues in practical application are discussed. The concept of optimal working range and maintenance time is defined and the way to obtain the matching relationship between super capacitor and maintenance time is proposed.
出处
《电力自动化设备》
EI
CSCD
北大核心
2014年第2期48-53,60,共7页
Electric Power Automation Equipment
基金
国家高技术研究发展计划(863计划)资助项目(2012AA050214)
国家自然科学基金资助项目(51377021)
江苏省自然科学基金资助项目(BK2012753)~~
关键词
光伏模组
光伏电池
失配运行方式
补偿
光照强度
维持时间
photovohaic modules
photovohaic cells
mismatch mode
compensation
light intensity
maintenance time
