| Z源逆变器光伏发电系统变量调制范围随动的两级控制研究 |
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| 引用本文： | 葛曼倩,丁新平.Z源逆变器光伏发电系统变量调制范围随动的两级控制研究[J].青岛理工大学学报,2009,30(4):199-204. |
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| 作者姓名： | 葛曼倩 丁新平 |
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| 作者单位： | 1. 青岛电力设计院有限公司,青岛,266002
2. 青岛理工大学,自动化工程学院,青岛,266520 |
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| 摘 要： | Z源逆变器光伏发电系统是一种具有升/降压功能的单级系统,可以通过调节直通占空比实现前级光伏电池的最大功率跟踪(MPPT)控制,然后由逆变器调制因子m实现并网控制.提出了一种直通占空比调制范围上限随动的两级控制策略.该策略兼顾了两级控制和单级控制的优点:充分利用了直通零矢量,使逆变器的调制因子m增大,直流电压利用率高,相应的有源器件的电压应力和逆变器输出电流谐波得到很大地改善;消除了光伏电池和电网之间的影响.仿真和实验结果验证了理论分析的正确性与实用性.
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| 关 键 词： | 光伏电池 最大功率点跟踪 Z源逆变器 直通 |
Two-Stage Control Strategy with Variable Shoot-Through Duty Cycle Maximum Range on Z-Source Inverter PV System |
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| GE Man-qian,DING Xin-ping.Two-Stage Control Strategy with Variable Shoot-Through Duty Cycle Maximum Range on Z-Source Inverter PV System[J].Journal of Qingdao Technological University,2009,30(4):199-204. |
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| Authors: | GE Man-qian DING Xin-ping |
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| Affiliation: | 1.Qingdao Electric Power Design Institute Co. Ltd;Qingdao 266002;China;2.School of Automation Engineering;Qingdao Technological University;Qingdao 266520;China |
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| Abstract: | The Z-source inverter photovoltaic system is a single-stage system,which has buck/boost characteristic. It achieves the maximum power point tracking(MPPT) with the control shoot-through duty cycle and fulfills the grid-connection with the modulation index m. A two-stage control technique for the Z-source inverter based on the PV system,with variable shoot-through duty cycle maximum range,has been presented. The output voltage of the Z-source inverter with the proposed control method can faithfully follow th... |
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| Keywords: | photovoltaic cell MPPT Z-source inverter shoot-through |
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