局部阴影情况下不同结构光伏阵列输出特性研究
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摘要
由于局部阴影的影响,使光伏阵列出现失配现象而导致输出效率大幅降低,为此该文对不同结构的光伏阵列在多种阴影情况下的输出特性进行对比研究,研究表明网状(TCT)结构均优于其他结构,尤其是当出现离散局部阴影时。在此基础上,提出一种阴影离散化方法,并将其应用于TCT结构。仿真结果证明:阴影离散化方法能使光伏阵列最大输出功率增加约20%,可有效提高光伏系统的发电效率。与模块式和重构式光伏发电系统相比,上述方法更易于实现,且成本较低。
Due to the impact of partial shading,the mismatch phenomenon of photovoltaic array will appear,and the output efficiency greatly reduced. In view of the above questions,this paper made a comparative study on the output characteristics of photovoltaic arrays with different structures under different shading conditions. The results show that TCT structure is superior to other structures,especially under discrete partial shading conditions. On this basis,a method of shadow discretization was proposed and applied to the TCT structure. The simulation results show that the method can increase the maximum output power of PV array by about 20%. Compared with the modular and reconfigurable photovoltaic power generation system,the method is more easy to implement and lower cost.
Due to the impact of partial shading,the mismatch phenomenon of photovoltaic array will appear,and the output efficiency greatly reduced. In view of the above questions,this paper made a comparative study on the output characteristics of photovoltaic arrays with different structures under different shading conditions. The results show that TCT structure is superior to other structures,especially under discrete partial shading conditions. On this basis,a method of shadow discretization was proposed and applied to the TCT structure. The simulation results show that the method can increase the maximum output power of PV array by about 20%. Compared with the modular and reconfigurable photovoltaic power generation system,the method is more easy to implement and lower cost.
引文
[1]刘祝鸿,陈鸣.太阳电池组件中电池的失配现象研究[J].太阳能学报,2012,33(12):2074—2079.[1] Liu Zhuhong,Chen Ming. Investigation of mismatch loss in PV module[J]. Acta Energlae Solaris Sinica,2012,33(12):2074—2079.
[2] Molenbroek E,Waddington D W,Emery K A. Hot spot susceptibility and testing of PV modules[A]. Conference Record of the Twenty Second IEEE Photovoltaic Specialists Conference[C],Las Vegas,Nevada,1991.
[3] Silvestre S,Boronat A,Chouder A. Study of bypass diodes configuration on PV modules[J]. Applied Energy,2009,86(9):1632—1640.
[4] Murtaza A,Chiaberge M,Spertino F. A maximum power point tracking technique based on bypass diode mechanism for PV arrays under partial shading[J].Energy and Buildings,2014,73:13—25.
[5] Gautam N K,Kaushika N D. Network analysis of faulttolerant solar photovoltaic arrays[J]. Solar Energy Materials&Solar Cells,2001,69(1):25—42.
[6] Gautam N K,Kaushika N D. An efficient algorithm to simulate the electrical performance of solar photovoltaic arrays[J]. Energy,2002,27(4):347—361.
[7]刘邦银,梁超辉,段善旭.直流模块式建筑集成光伏系统的拓扑研究[J].中国电机工程学报,2008,28(20):88—104.[7] Liu Bangyin,Liang Chaohui,Duan Shanxu. Research on topology of DC-module-based building integrated photovoltaic system[J]. Proceedings of the CSEE,2008,28(20):88—104.
[8] Zheng Huiying,Li Shuhui,Challoo R. Shading and bypass diode impacts to energy extraction of PV arrays under different converter configurations[J]. Renewable Energy,2014,68:58—66.
[9] Nguyen D,Lehman B. An adaptive solar photovoltaic array using model-based reconfiguration algorithm[J].IEEE Transactions on Industrial Electronics,2008,55(7):2644—2654.
[10] Parlak K S. PV array reconfiguration method under partial shading conditions[J]. Electrical Power and Energy Systems,2014,63:713—721.
[11]丁明,陈中.遮阴影响下的光伏阵列结构研究[J].电力自动化设备,2011,31(10):1—5.[11] Ding Ming,Chen Zhong. Reconfiguration of partially shaded photovoltaic array[J]. Electric Power Automation Equipment,2011,31(10):1—5.
[12] Wang Yaw-Juen,Hsu Po-Chun. An investigation on partial shading of PV modules with different connection configurations of PV cells[J]. Energy,2011,36(5):3069—3078.
[2] Molenbroek E,Waddington D W,Emery K A. Hot spot susceptibility and testing of PV modules[A]. Conference Record of the Twenty Second IEEE Photovoltaic Specialists Conference[C],Las Vegas,Nevada,1991.
[3] Silvestre S,Boronat A,Chouder A. Study of bypass diodes configuration on PV modules[J]. Applied Energy,2009,86(9):1632—1640.
[4] Murtaza A,Chiaberge M,Spertino F. A maximum power point tracking technique based on bypass diode mechanism for PV arrays under partial shading[J].Energy and Buildings,2014,73:13—25.
[5] Gautam N K,Kaushika N D. Network analysis of faulttolerant solar photovoltaic arrays[J]. Solar Energy Materials&Solar Cells,2001,69(1):25—42.
[6] Gautam N K,Kaushika N D. An efficient algorithm to simulate the electrical performance of solar photovoltaic arrays[J]. Energy,2002,27(4):347—361.
[7]刘邦银,梁超辉,段善旭.直流模块式建筑集成光伏系统的拓扑研究[J].中国电机工程学报,2008,28(20):88—104.[7] Liu Bangyin,Liang Chaohui,Duan Shanxu. Research on topology of DC-module-based building integrated photovoltaic system[J]. Proceedings of the CSEE,2008,28(20):88—104.
[8] Zheng Huiying,Li Shuhui,Challoo R. Shading and bypass diode impacts to energy extraction of PV arrays under different converter configurations[J]. Renewable Energy,2014,68:58—66.
[9] Nguyen D,Lehman B. An adaptive solar photovoltaic array using model-based reconfiguration algorithm[J].IEEE Transactions on Industrial Electronics,2008,55(7):2644—2654.
[10] Parlak K S. PV array reconfiguration method under partial shading conditions[J]. Electrical Power and Energy Systems,2014,63:713—721.
[11]丁明,陈中.遮阴影响下的光伏阵列结构研究[J].电力自动化设备,2011,31(10):1—5.[11] Ding Ming,Chen Zhong. Reconfiguration of partially shaded photovoltaic array[J]. Electric Power Automation Equipment,2011,31(10):1—5.
[12] Wang Yaw-Juen,Hsu Po-Chun. An investigation on partial shading of PV modules with different connection configurations of PV cells[J]. Energy,2011,36(5):3069—3078.