2023.3Vol.47No.3研究与设计收稿日期:2022-08-27基金项目:国家自然科学基金项目(51907034);广西科技基地和人才专项科技项目(2020AC19010)作者简介:叶志(1998—),男,四川省人,硕士研究生,主要研究方向为光伏发电与逆变。基于对偶相切和Lagrange插值的高压光伏MPPT算法叶志,施武生,曾亚东,李凯(广西大学电气工程学院,广西南宁530004)摘要:为了提高高压光伏发电系统中最大功率点跟踪(MPPT)的速度、精度以及跟踪到最大功率点(MPP)后运行的平稳度,提出一种对偶相切与Lagrange插值相结合的改进MPPT算法。该算法利用对偶切线法的快速性和Lagrange插值法的近似拟合作用,迅速将参考电压定位到最大功率点附近,最后以极小的步长运行到MPP。仿真结果表明:所提出的改进MPPT算法与传统扰动观测法相比,能够更快速、精准地追踪到最大功率点,并以更小的波动持续地输出最大功率,有效地减少了光伏发电系统的功率损失,提高了太阳能的利用率。关键词:光伏电池;最大功率点跟踪;对偶切线;Lagrange插值中图分类号:TM914文献标识码:A文章编号:1002-087X(2023)03-0393-05DOI:10.3969/j.issn.1002-087X.2023.03.028HighvoltagephotovoltaicMPPTalgorithmbasedondualtangentandLagrangeinterpolationYEZhi,SHIWusheng,ZENGYadong,LIKai(SchoolofElectricalEngineering,GuangxiUniversity,NanningGuangxi530004,China)Abstract:Inordertoimprovethespeedandaccuracyofmaximumpowerpointtracking(MPPT),andthesmoothnessofoperationaftertrackingtothemaximumpowerpoint(MPP)inhigh-voltagephotovoltaicpowergenerationsystems,animprovedMPPTalgorithmcombiningdualtangentandLagrangeinterpolationwasproposed.ThealgorithmutilizedtherapidityofthedualtangentmethodandtheapproximatefittingeffectoftheLagrangeinterpolationmethodtoquicklylocatethereferencevoltagenearthemaximumpowerpoint,andfinallyruntotheMPPwithaverysmallstepsize.Thesimulationresultsshowthatcomparedwiththetraditionaldisturbanceobservationmethod,theproposedimprovedMPPTalgorithmcantrackthemaximumpowerpointmorequicklyandaccurately,andcontinuouslyoutputthemaximumpowerwithsmallerfluctuations,whicheffectivelyreducesthepowerofthephotovoltaicpowergenerationsystem.loss,andimprovetheutilizationrateofsolarenergy.Keywords:photovoltaiccell;maxim...