摘要
针对分布式并网光伏发电系统各环节功率损耗量大、系统综合效率(PR,Performance Ratio)较低的问题,文章首先全面分析了影响光伏系统效率的各个因素,定性和定量研究其功率损耗机制,并结合项目建设经验给出各影响因子的效率损失典型值。然后从系统设计角度出发,提出各影响因素功率损耗的优化方法。最后利用PVsyst光伏系统仿真平台,按照所提出的优化策略对光伏系统直流线路设计方案进行改进。实例仿真结果表明,优化后的系统年均发电效率提高0.31%,年均发电量提高4 053 k Wh,并产生可观的经济效益。
The performance ratio of distributed grid-connected photovoltaic power generation sys- tems is rather low,because of large amount of power loss in each link. Firstly,aiming at this problem,the efficiency factors of the system are analyzed comprehensively,the mechanism of power loss is studied qualitatively and quantitatively, according to the experience of project con- struction, the typical values efficiency loss of each impact factor is given.Then,starting off the system design,the power loss optimization methods of these factors are put forward.Finally,the dc circuit design scheme is modified on the basis of optimized strategies based on PVsyst.The simu- lation results of example show that efficiency and capacity of the modified system have been im- proved by 0.3% and 4.053 kWh each year, and considerable economy benefit is produced at the same time.
出处
《可再生能源》
CAS
北大核心
2016年第2期196-202,共7页
Renewable Energy Resources
关键词
光伏发电系统
功率损耗
效率
分析
优化
photovoltaic power generation systems
power loss
efficiency
analysis
optimization
