基于差分功率处理提高光伏系统能量转换可靠性的研究  

Study on energy conversion and reliability improvement in photovoltaic systems using differential power processing

作　　者：杨舟 蒋雯倩 潘俊涛 周政雷 陈珏羽 孔祥玉[2] Yang Zhou;Jiang Wenqian;Pan Juntao;Zhou Zhenglei;Chen Jueyu;Kong Xiangyu(Guangxi Power Grid Company Limited,Nanning 530001,China;Key Laboratory of Smart Grid of Ministry of Education(Tianjin University),Tianjin 300072,China)

机构地区：[1]广西电网有限责任公司,广西南宁530001 [2]智能电网教育部重点实验室(天津大学),天津300072

出　　处：《可再生能源》2023年第7期964-970,共7页Renewable Energy Resources

基　　金：国家自然科学基金项目(51877145)。

摘　　要：光伏电站中光电能量转换的可靠性较低,在加入逆变器之后,虽然能提高光伏系统的可靠性,但也降低了整体系统的功率稳定性,最终使得光伏系统的可靠性提升并不明显。文章引入了差分功率处理,可以提高整个光伏系统的可靠性。为了分析光伏电站并网对发电系统可靠性的影响,提出了基于差分功率处理提高光伏电站系统可靠性的3种模型,运用蒙特卡洛方法对这3种模型进行了10 000次模拟,对比分析差分功率处理对光伏系统的功率稳定性的影响,并建立了3种对应的可靠性数学模型来进行定量分析。结果显示,经差分功率处理后的光伏系统可靠性提高更加明显。Although photovoltaic(PV)power plants have a long lifetime of photovoltaic panels,the reliability of energy conversion in PV power plants is low.The addition of an inverter improves the reliability of the PV system,but brings about a reduction in the power stability of the PV system,making the improvement in the reliability of the PV system insignificant.However,by introducing differential power processing,the reliability of the whole PV system can be improved.Therefore,in order to analyze the impact of grid-connected PV plants on the reliability of power generation systems,this paper proposes a model of differential power to improve the reliability of PV plant systems.By using Monte Carlo method,10000 simulations were performed and compared with the power processed by three different methods.The results show that the system reliability after differential power treatment is more obvious.

关 键 词：光伏系统 可靠性 差分功率处理 最大功率点 蒙特卡洛 

分 类 号：TK51[动力工程及工程热物理—热能工程] TM72[电气工程—电力系统及自动化]