| 低输入电压高效率并网微逆变器的研究 |
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| 引用本文： | 张晓玲,王慧馨,马凯莉,刘拓夫,王正仕.低输入电压高效率并网微逆变器的研究[J].电源学报,2016,14(3):56-61. |
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| 作者姓名： | 张晓玲 王慧馨 马凯莉 刘拓夫 王正仕 |
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| 作者单位： | 浙江大学电气工程学院, 杭州 310027;浙江大学电气工程学院, 杭州 310027;浙江大学电气工程学院, 杭州 310027;浙江大学电气工程学院, 杭州 310027;浙江大学电气工程学院, 杭州 310027 |
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| 基金项目： | 浙江省公益性工业技术应用研究计划资助项目(2015C31121) |
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| 摘 要： | 针对单个光伏电池输出电压较低这一问题,提出了一种低输入电压、高效率的单相两级光伏并网微逆变器拓扑。该拓扑前级采用一种高效率的高增益DC/DC结构,实现了软开关技术;后级为全桥逆变结构,采用单电感滤波,应用软件锁相和重复控制电流内环、电压外环等软件控制方法实现逆变并网。研制了一台额定功率为300 W的单相光伏并网微逆变器。经测试,该逆变器满载时并网电流总谐波含量(THD)为1.3%,效率为93.6%,验证了所提拓扑的可行性与有效性。
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| 关 键 词： | 光伏 微逆变器 高增益DC/DC 软开关 高效率 |
| 收稿时间： | 2015/10/26 0:00:00 |
| 修稿时间： | 2016/5/16 0:00:00 |
Research on High Efficient Micro PV Grid-connected Inverter with Low Input Voltage |
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| ZHANG Xiaoling,WANG Huixin,MA Kaili,LIU Tuofu and WANG Zhengshi.Research on High Efficient Micro PV Grid-connected Inverter with Low Input Voltage[J].Journal of power supply,2016,14(3):56-61. |
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| Authors: | ZHANG Xiaoling WANG Huixin MA Kaili LIU Tuofu and WANG Zhengshi |
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| Affiliation: | College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China;College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China;College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China;College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China;College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China |
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| Abstract: | Single PV cell''s output voltage is low, concerning this issue, a novel topology of single-phase PV grid-connected inverter with high efficiency is proposed. Its preceding stage is a high step-up DC/DC converter with soft-switching technology. Using single inductor filter, software phase-locked loop (SPLL), repetitive control and voltage-loop control are adopted to achieve a high quality of grid-connected current in full bridge inverter. Correspondingly, a prototype whose rated power is 300 W is set up to verify theoretical analysis results. Test result shows that the total harmonic distortion (THD) of grid-connected current is 1.3% and the efficiency is 93.6% when the inverter successfully connects to grid with full load. |
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| Keywords: | pv micro inverter high step-up DC/DC soft switching high efficiency |
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