光伏最大功率点跟踪变步长电导增量法的算法优化
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摘要
根据光伏(photovoltaic,PV)系统输出电压-功率(U-P)曲线在最大功率点(maximum power point,MPP)两侧斜率变化的规律有所不同,MPP左侧曲线变化舒缓,右侧相对陡直的特点,在光伏最大功率点跟踪(maximum power point tracking,MPPT)控制方法的研究基础之上,结合现有一些变步长电导增量法,提出了一种在MPP左侧利用指数函数来调整跟踪电压步长;在MPP右侧利用对数函数来调整跟踪电压步长的分段式变步长电导增量优化算法。仿真实验结果表明该方法良好地实现了对光伏系统最大功率点的跟踪,有效地降低了跟踪过程中MPP附近由步长振荡引起的功率损耗,提高了PV系统的功率输出效率。
According to the photovoltaic system output voltage curve in the change rule of the maximum power point on both sides of the different slope,the left slope of MPP changing smoothly,right relatively steeply,on the basis of maximum power point tracking control method research,and combined with the existing variable step-size incremental conductance method,a optimization algorithm of the piecewise variable step-size incremental conductance method was presented that a exponential function is used to adjust the tracking voltage step on the left side of the MPP,and a logarithmic function is used to adjust the tracking voltage step on the right side of the MPP. Simulation results show that this method is good for photovoltaic system maximum power point tracking,effectively reducing the power loss near the MPP caused by the oscillation of step-size in the tracking process,and improve the power output efficiency of PV system.
According to the photovoltaic system output voltage curve in the change rule of the maximum power point on both sides of the different slope,the left slope of MPP changing smoothly,right relatively steeply,on the basis of maximum power point tracking control method research,and combined with the existing variable step-size incremental conductance method,a optimization algorithm of the piecewise variable step-size incremental conductance method was presented that a exponential function is used to adjust the tracking voltage step on the left side of the MPP,and a logarithmic function is used to adjust the tracking voltage step on the right side of the MPP. Simulation results show that this method is good for photovoltaic system maximum power point tracking,effectively reducing the power loss near the MPP caused by the oscillation of step-size in the tracking process,and improve the power output efficiency of PV system.
引文
1 Tang C W.Two-layer organic photovoltaic cell.Applied Physics Letters,1986;48(2):183-185
2邵汉桥,张籍,张维.分布式光伏发电经济性及政策分析.电力建设,2014;35(7):51-57Shao Hanqiao,Zhang Ji,Zhang Wei.Economy and policy analysis of distributed photovoltaic generation.Electric Power Construction,2014;35(7):51-57
3 Masoum M A S,Dehbonei H,Fuchs E F.Theoretical and experimental analyses of photovoltaic systems with voltage and current-based maximum power-point tracking.IEEE Transactions on Energy Conversion,2002;17(4):514-522
4刘明亮,张逸,范元亮,等.一种基于变步长电导增量法的自适应MPPT控制策略.可再生能源,2017;35(5):681-688Liu Mingliang,Zhang Yi,Fan Yuanliang,et al.A type of MPPTcontrol strategy based on variable step-size incremental conductance algorithm.Renewable Energy Resource,2017;35(5):681-688
5孟祥萍,冷淼,张红,等.改进变步长滞环比较法的MPPT算法研究.自动化仪表,2017;38(1):38-41Meng Xiangping,Leng Miao,Zhang Hong,et al.MPPT control strategy based on improved variable step size hysteresis comparison method.Process Automation Instrumentation,2017;38(1):38-41
6荣德生,刘凤.改进型扰动观察法在光伏MPPT中的研究.电力系统及其自动化学报,2017;29(3):104-109Rong Desheng,Liu Feng.Application of improved perturbation and observation method to photovoltaic MPPT.Proceedings of the CSU-EPSA,2017;29(3):104-109
7王志兵.基于恒压法结合变步长电导增量法的最大功率点跟踪.科学技术与工程,2012;12(19):4638-4642Wang Zhibing.Maximum power point tracking by using improved incond method control for photovoltaic energy generation system.Science Technology and Engineering,2012;12(19):4638-4642
8于子捷,魏晨曦,田芳芳,等.一种改进型扰动观察法在最大功率点跟踪中的应用.电测与仪表,2017;54(15):113-119Yu Zijie,Wei Chenxi,Tian Fangfang,et al.An improved perturbation and observation method used in maximum power point tracking control of PV generation system.Electrical Measurement&Instrumentation,2017;54(15):113-119
9王书征,李先允.一种新型自适应扰动观察法在光伏发电MPPT策略中的应用.太阳能学报,2016;37(9):2393-2400Wang Shuzheng,Li Xianyun.Application of a novel adaptive perturbation and observation method in MPPT strategy for photovoltaic power system.Acta Energiae Solaris Sinica,2016;37(9):2393-2400
10黄克亚,尤凤翔,李文石.模糊神经网络在光伏发电MPPT中的应用.计算机仿真,2012;29(8):300-304Huang Keya,You Fengxiang,Li Wenshi.Application of fuzzy neural networks in MPPT of photovoltaic power generation system.Computer Simulation,2012;29(8):300-304
11刘建辉,李博.局部阴影下基于遗传蚁群算法对MPPT的研究.可再生能源,2017;35(1):13-19Liu Jianhui,Li Bo.Partial shadow MPPT based on genetic ant colony algorithm.Renewable Energy Resources,2017;35(1):13-19
12万晓凤,胡伟,余运俊,等.基于蚁群优化算法的光伏阵列多峰特性最大功率点跟踪.电力系统及其自动化学报,2016;28(12):70-76Wan Xiaofeng,Hu Wei,Yu Yunjun,et al.Maximum power point tracking based on ant colony optimization algorithm for multi-peak characteristic of PV array.Proceedings of the CSU-EPSA,2016;28(12):70-76
13郑义斌.光伏发电系统最大功率跟踪与并网控制方法.成都:西南交通大学,2016Zheng Yibin.Maximum power point tracking and grid connected control method for photovoltaic power generation system.Chengdu:Southwest Jiaotong University,2016
14杜翼,朱克平,尹瑞,等.基于分布式电源的直流配电网建模与仿真.电力建设,2014;35(7):13-19Du Yi,Zhu Keping,Yin Rui,et al.Modeling and simulation of DCpower distribution network based on distributed generation.Electric Power Construction,2014;35(7):13-19
15周东宝,陈渊睿.基于改进型变步长电导增量法的最大功率点跟踪策略.电网技术,2015;39(6):1491-1498Zhou Dongbao,Chen Yuanrui.Maximum power point tracking strategy based on modified variable step-size incremental conductance algorithm.Power System Technology,2015;39(6):1491-1498
16吴雷,杜蘅,徐鹏.一种用于光伏MPPT的分阶段变步长电导增量法.电源技术,2016;140(3):617-620Wu Lei,Du Heng,Xu Peng.Staged variable step size INC MPPTmethod for PV system.Chinese Journal of Power Sources,2016;140(3):617-620
17陈亚爱,周京华,李津,等.梯度式变步长MPPT算法在光伏系统中的应用.中国电机工程学报,2014;34(19):3156-3161Chen Yaai,Zhou Jinghua,Li Jin,et al.Application of gradient variable step size MPPT algorithm in photovoltaic system.Proceedings of the CSEE,2014;34(19):3156-3161
18谢玲玲,龚仁喜,李畸勇.光伏发电最大功率点跟踪交错并联Boost变换器的动力学特性分析.中国电机工程学报,2013;33(6):38-45Xie Lingling,Gong Renxi,Li Jiyong.Analysis of the dynamical characteristics of the interleaved Boost converter in maximum power point tracking for photovoltaic power.Proceedings of the CSEE,2013;33(6):38-45
2邵汉桥,张籍,张维.分布式光伏发电经济性及政策分析.电力建设,2014;35(7):51-57Shao Hanqiao,Zhang Ji,Zhang Wei.Economy and policy analysis of distributed photovoltaic generation.Electric Power Construction,2014;35(7):51-57
3 Masoum M A S,Dehbonei H,Fuchs E F.Theoretical and experimental analyses of photovoltaic systems with voltage and current-based maximum power-point tracking.IEEE Transactions on Energy Conversion,2002;17(4):514-522
4刘明亮,张逸,范元亮,等.一种基于变步长电导增量法的自适应MPPT控制策略.可再生能源,2017;35(5):681-688Liu Mingliang,Zhang Yi,Fan Yuanliang,et al.A type of MPPTcontrol strategy based on variable step-size incremental conductance algorithm.Renewable Energy Resource,2017;35(5):681-688
5孟祥萍,冷淼,张红,等.改进变步长滞环比较法的MPPT算法研究.自动化仪表,2017;38(1):38-41Meng Xiangping,Leng Miao,Zhang Hong,et al.MPPT control strategy based on improved variable step size hysteresis comparison method.Process Automation Instrumentation,2017;38(1):38-41
6荣德生,刘凤.改进型扰动观察法在光伏MPPT中的研究.电力系统及其自动化学报,2017;29(3):104-109Rong Desheng,Liu Feng.Application of improved perturbation and observation method to photovoltaic MPPT.Proceedings of the CSU-EPSA,2017;29(3):104-109
7王志兵.基于恒压法结合变步长电导增量法的最大功率点跟踪.科学技术与工程,2012;12(19):4638-4642Wang Zhibing.Maximum power point tracking by using improved incond method control for photovoltaic energy generation system.Science Technology and Engineering,2012;12(19):4638-4642
8于子捷,魏晨曦,田芳芳,等.一种改进型扰动观察法在最大功率点跟踪中的应用.电测与仪表,2017;54(15):113-119Yu Zijie,Wei Chenxi,Tian Fangfang,et al.An improved perturbation and observation method used in maximum power point tracking control of PV generation system.Electrical Measurement&Instrumentation,2017;54(15):113-119
9王书征,李先允.一种新型自适应扰动观察法在光伏发电MPPT策略中的应用.太阳能学报,2016;37(9):2393-2400Wang Shuzheng,Li Xianyun.Application of a novel adaptive perturbation and observation method in MPPT strategy for photovoltaic power system.Acta Energiae Solaris Sinica,2016;37(9):2393-2400
10黄克亚,尤凤翔,李文石.模糊神经网络在光伏发电MPPT中的应用.计算机仿真,2012;29(8):300-304Huang Keya,You Fengxiang,Li Wenshi.Application of fuzzy neural networks in MPPT of photovoltaic power generation system.Computer Simulation,2012;29(8):300-304
11刘建辉,李博.局部阴影下基于遗传蚁群算法对MPPT的研究.可再生能源,2017;35(1):13-19Liu Jianhui,Li Bo.Partial shadow MPPT based on genetic ant colony algorithm.Renewable Energy Resources,2017;35(1):13-19
12万晓凤,胡伟,余运俊,等.基于蚁群优化算法的光伏阵列多峰特性最大功率点跟踪.电力系统及其自动化学报,2016;28(12):70-76Wan Xiaofeng,Hu Wei,Yu Yunjun,et al.Maximum power point tracking based on ant colony optimization algorithm for multi-peak characteristic of PV array.Proceedings of the CSU-EPSA,2016;28(12):70-76
13郑义斌.光伏发电系统最大功率跟踪与并网控制方法.成都:西南交通大学,2016Zheng Yibin.Maximum power point tracking and grid connected control method for photovoltaic power generation system.Chengdu:Southwest Jiaotong University,2016
14杜翼,朱克平,尹瑞,等.基于分布式电源的直流配电网建模与仿真.电力建设,2014;35(7):13-19Du Yi,Zhu Keping,Yin Rui,et al.Modeling and simulation of DCpower distribution network based on distributed generation.Electric Power Construction,2014;35(7):13-19
15周东宝,陈渊睿.基于改进型变步长电导增量法的最大功率点跟踪策略.电网技术,2015;39(6):1491-1498Zhou Dongbao,Chen Yuanrui.Maximum power point tracking strategy based on modified variable step-size incremental conductance algorithm.Power System Technology,2015;39(6):1491-1498
16吴雷,杜蘅,徐鹏.一种用于光伏MPPT的分阶段变步长电导增量法.电源技术,2016;140(3):617-620Wu Lei,Du Heng,Xu Peng.Staged variable step size INC MPPTmethod for PV system.Chinese Journal of Power Sources,2016;140(3):617-620
17陈亚爱,周京华,李津,等.梯度式变步长MPPT算法在光伏系统中的应用.中国电机工程学报,2014;34(19):3156-3161Chen Yaai,Zhou Jinghua,Li Jin,et al.Application of gradient variable step size MPPT algorithm in photovoltaic system.Proceedings of the CSEE,2014;34(19):3156-3161
18谢玲玲,龚仁喜,李畸勇.光伏发电最大功率点跟踪交错并联Boost变换器的动力学特性分析.中国电机工程学报,2013;33(6):38-45Xie Lingling,Gong Renxi,Li Jiyong.Analysis of the dynamical characteristics of the interleaved Boost converter in maximum power point tracking for photovoltaic power.Proceedings of the CSEE,2013;33(6):38-45