基于分区域控制法的MPPT研究与仿真
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摘要
针对变步长电导增量法响应速度慢的缺陷,提出一种新的最大功率点(MPPT)控制方法,即在不同区域可以将短路电流比例系数法、定电压跟踪法与变步长电导增量法及时切换的MPPT控制方法。通过在PSCAD/EMTDC仿真平台进行验证,无论在标准状况下还是环境突变时,该方法均能迅速准确地找到最大功率点,大大提高了MPPT的收敛速度和控制精度,减少了在最大功率点附近的震荡。
Aiming at the defect of slow respond speed in using variable step-size incremental conductance method,author proposed a new MPPT control method. That is the method that enables the short circuit current ratio coefficient method,constant voltage tracking method and the variable step incremental conductance method switching in time. Through the test on PSCAD/EMTDC simulation platform,this method can quickly and accurately find the maximum power point whether under normal conditions or environmental catastrophe. In doing so,convergence speed and control precision have been greatly improved and the shock have been reduced near the maximum power point.
Aiming at the defect of slow respond speed in using variable step-size incremental conductance method,author proposed a new MPPT control method. That is the method that enables the short circuit current ratio coefficient method,constant voltage tracking method and the variable step incremental conductance method switching in time. Through the test on PSCAD/EMTDC simulation platform,this method can quickly and accurately find the maximum power point whether under normal conditions or environmental catastrophe. In doing so,convergence speed and control precision have been greatly improved and the shock have been reduced near the maximum power point.
引文
[1]崔东君,彭宇,杨进.固定电压法与改进电导增量法结合的光伏发电系统最大功率点跟踪[J].四川电力技术,2015,38(3):78-81.CUI Dongjun,PENG Yu,YANG Jin.The MPPT algorithm combined with constant voltage method and improved incremental conductance method of photovoltaic grid-connected generation system[J].Sichuan Electric Power Technology,2015,38(3):78-81.
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[3]贺婷,龚仁喜,李畸勇.短路电流法与变步长扰动观察法结合的MPPT算法研究[J].电测与仪表,2012,49(7):6-10.HE Ting,GONG Renxi,LI Jiyong.Research on maximum-powerpoint tracking method based on the short-current combined with variable step p&o[J].Electrical Measurement and Instrumentation,2012,49(7):6-10.
[4]苏虎成,陈忠,刘晋,等.基于开路电压、短路电流的最优梯度法的光伏发电系统MPPT控制[J].电气开关,2010,48(1):17-20.SU Hucheng,CHEN Zhong,LIU Jin,et al.Photovoltaic system MPPT control based on optimum gradient method of open-circuit voltage and short-circuit current[J].Electric Switch,2010,48(1):17-20.
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[8]乔月竹,韩学军,王大伟.光伏发电系统最大功率点跟踪方法研究[J].黑龙江电力,2014,36(2):113-117.QIAO Yuezhu,HAN Xuejun,WANG Dawei.Research on MPPT method of photovoltaic power generation system[J].Heilongjiang Electric Power,2014,36(2):113-117.
[9]阿尔及瑞奇奥.光伏发电系统的优化-建模、仿真和控制[M].北京:机械工业出版社,2014.REKIOUA D.Optimization of photovoltaic power systems modelization,simulation and control[M].Beijing:China Machine Press,2014.
[10]李艳青,田建设,刘春堂.基于全局变步长电导增量法光伏阵列MPPT研究[J].黑龙江电力,2012,34(6):428-431.LI Yanqing,TIAN Jianshe,LIU Chuntang.Photovoltaic array maximum power point tracking based on global variable step size INC method[J].Heilongjiang Electric Power,2012,34(6):428-431.
[11]张峥.具有MPPT功能的单级式光伏并网发电系统仿真分析[J].黑龙江电力,2011,33(6):467-472.ZHANG Zheng.Simulation analysis of single stage grid-connected photovoltaic system with MPPT function[J].Heilongjiang Electric Power,2011,33(6):467-472.
[2]张超,何湘宁.短路电流结合扰动观察法在光伏发电最大功率点跟踪控制中的应用[J].中国电机工程学报,2006,26(20):98-102.ZHANG Chao,HE Xiangning.Short-current combined with perturbation and observation maximum-power-point tracking method for photovoltaic power systems[J].Proceedings of the CSEE,2006,26(20):98-102.
[3]贺婷,龚仁喜,李畸勇.短路电流法与变步长扰动观察法结合的MPPT算法研究[J].电测与仪表,2012,49(7):6-10.HE Ting,GONG Renxi,LI Jiyong.Research on maximum-powerpoint tracking method based on the short-current combined with variable step p&o[J].Electrical Measurement and Instrumentation,2012,49(7):6-10.
[4]苏虎成,陈忠,刘晋,等.基于开路电压、短路电流的最优梯度法的光伏发电系统MPPT控制[J].电气开关,2010,48(1):17-20.SU Hucheng,CHEN Zhong,LIU Jin,et al.Photovoltaic system MPPT control based on optimum gradient method of open-circuit voltage and short-circuit current[J].Electric Switch,2010,48(1):17-20.
[5]郭晓芸.并网型光伏发电优化控制技术及其建模仿真[D].北京:华北电力大学,2013.GUO Xiaoyun.Research on optimization control methods and simulation of photovoltaic grid-connected generation system[D].Beijing:North China Electric Power University,2004.
[6]乔月竹,韩学军,王大伟.光伏电池建模及MPPT仿真研究[J].黑龙江电力,2014,36(1):30-34.QIAO Yuezhu,HAN Xuejun,WANG Dawei.Photovoltaic cell modeling and MPPT simulation study[J].Heilongjiang Electric Power,2014,36(1):30-34.
[7]耿华,刘淳.新能源并网发电系统的低电压穿越[M].北京:机械工业出版社,2014.GENG Hua,LIU Chun.Low voltage ride-through of grid-connected photovoltic power system[M].Beijing:China Machine Press,2014.
[8]乔月竹,韩学军,王大伟.光伏发电系统最大功率点跟踪方法研究[J].黑龙江电力,2014,36(2):113-117.QIAO Yuezhu,HAN Xuejun,WANG Dawei.Research on MPPT method of photovoltaic power generation system[J].Heilongjiang Electric Power,2014,36(2):113-117.
[9]阿尔及瑞奇奥.光伏发电系统的优化-建模、仿真和控制[M].北京:机械工业出版社,2014.REKIOUA D.Optimization of photovoltaic power systems modelization,simulation and control[M].Beijing:China Machine Press,2014.
[10]李艳青,田建设,刘春堂.基于全局变步长电导增量法光伏阵列MPPT研究[J].黑龙江电力,2012,34(6):428-431.LI Yanqing,TIAN Jianshe,LIU Chuntang.Photovoltaic array maximum power point tracking based on global variable step size INC method[J].Heilongjiang Electric Power,2012,34(6):428-431.
[11]张峥.具有MPPT功能的单级式光伏并网发电系统仿真分析[J].黑龙江电力,2011,33(6):467-472.ZHANG Zheng.Simulation analysis of single stage grid-connected photovoltaic system with MPPT function[J].Heilongjiang Electric Power,2011,33(6):467-472.