| 多路单级式直流侧串联光伏逆变系统的研究与分析 |
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| 引用本文： | 胡志勇,M.Mansoor Khan,崔灿,张秀彬.多路单级式直流侧串联光伏逆变系统的研究与分析[J].电气自动化,2012,34(3):42-45. |
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| 作者姓名： | 胡志勇 M.Mansoor Khan 崔灿 张秀彬 |
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| 作者单位： | 上海交通大学电气工程系,上海,200240 |
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| 摘 要： | 多路单级式直流侧串联光伏逆变系统拓扑结构由光伏阵列、直流侧串联电容、级联的单相全桥逆变器和隔离变压器构成.由于减少了直流升压环节,拓扑结构更简单,而将直流侧电容相串联则能够减少主电路电流,使用MOSFET 作为开关器件在该拓扑结构中更具优势,MOSFET能够使开关损耗减少,同时在并网逆变环节采用载波移相SPWM调制方式...
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| 关 键 词： | 光伏逆变器 双闭环 级联 载波移相SPWM 单级式 |
Research and Analysis of the Dc-link Cascaded Inverter for Single-stage Solar Power System |
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| HU Zhi-yong
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M.Mansoor Khan
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CUI Can
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ZHANG Xiu-bin.Research and Analysis of the Dc-link Cascaded Inverter for Single-stage Solar Power System[J].Electrical Automation,2012,34(3):42-45. |
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| Authors: | HU Zhi-yong MMansoor Khan CUI Can ZHANG Xiu-bin |
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| Affiliation: | (Shanghai Jiao Tong University,Shanghai 200240,China) |
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| Abstract: | The dc-link cascaded inverter for solar power system consists of PV array,dc-link capacitors,cascaded full bridge converters and isolated transformers.This topology decreases the boost converter which makes the structure simpler.The connected capacitors decrease the current of the main circuit and the use of MOSFETs have more superiority in decreasing the switching loss.The switching frequency can be further decreased by using the phase-shift modulation SPWM which directly influences the losses of the switching devices.By analyzing this new topology for two cascaded full bridges,it uses variable step MPPT,double control loop and phase-shift SPWM and finally the simulation confirms the effectiveness of the new topology.The result shows that the dc-link cascaded inverter has superior harmonic suppression and the simplification of the dc link control. |
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| Keywords: | Photovoltaic Inverter double loop multi-branch phase-shift SPWM single-stage |
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