| 光伏发电系统中高升压比DC-DC变换器 |
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| 引用本文： | 刘国海 吴 犇 金 科等. 光伏发电系统中高升压比DC-DC变换器[J]. 南京航空航天大学学报, 2012, 44(1): 25-31 |
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| 作者姓名： | 刘国海 吴 犇 金 科等 |
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| 作者单位： | 江苏大学电气信息工程学院;南京航空航天大学自动化学院 |
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| 基金项目： | 江苏省攻关(BE2007069)资助项目;江苏省高校自然科学研究(11KJB470005,10KJB470003)资助项目;江苏高校优势学科建设工程(PAPD)资助项目 |
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| 摘 要： | 光伏发电作为太阳能的重要应用方式正受到越来越广泛的关注,普遍采用前级DC-DC变换和后级逆变的结构。单相逆变器的输出电压通常为220 V(AC),这就要求前级DC-DC变换器具有很高的升压比。由于单级式DC-DC变换器难以满足要求,本文采用Boost变换器加ZVS全桥直流变压器的两级式结构。针对ZVS全桥直流变压器的不足,将LLC谐振网络应用于全桥直流变压器电路,提出了一种全桥LLC谐振直流变压器,从而实现整个负载范围内开关管的ZVS和整流二极管的ZCS。最后,分别制作了两台1 kW的原理样机进行实验验证,实验结果验证了理论分析的正确性。
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| 关 键 词： | 光伏发电 高升压比 全桥变换器 LLC谐振 |
High Step-Up Ratio DC-DC Converter for Photovoltaic Generation System |
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| Liu Guohai,Wu Ben,Jin Ke,Liao Zhiling. High Step-Up Ratio DC-DC Converter for Photovoltaic Generation System[J]. Journal of Nanjing University of Aeronautics & Astronautics, 2012, 44(1): 25-31 |
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| Authors: | Liu Guohai Wu Ben Jin Ke Liao Zhiling |
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| Affiliation: | 1(1.College of Electrical and Information Engineering,Jiangsu University,Zhenjiang,212013,China;2.College of Automation Engineering,Nanjing University of Aeronautics & Astronautics,Nanjing,210016,China) |
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| Abstract: | Photovoltaic(PV) generation system is an important application for the use of solar energy and attracts more and more attention.It usually contains a former DC-DC converter and an afterward inverter.Single-phase inverter output voltage is typically 220 V(AC),so the former DC-DC converter need to reach a high step-up ratio,which is out of the capability of the single-stage converter.A two-stage structure with a Boost converter and a full-bridge converter is used in this paper.Moreover,the LLC resonant network is introduced to the full-bridge converter for the further improvement of performance.Two 1 kW prototypes of DC-DC converter are built in the lab for comparison.The experimental results verify the theoretical analysis and satisfy the design requirements. |
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| Keywords: | photovoltaic(PV) generation high step-up ratio full-bridge converter LLC resonant |
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