| 引用本文: | 汪飞,徐新蔚,吴春华.光伏微型逆变器拓扑结构研究与分析[J].电力自动化设备,2018,(3): |
| WANG Fei,XU Xinwei,WU Chunhua.Research and analysis of photovoltaic micro-inverter topology[J].Electric Power Automation Equipment,2018,(3): |
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| 摘要: |
| 与集中式和组串式光伏并网逆变器不同，微型逆变器通常连接单块光伏组件。由于光伏组件具有最大功率点跟踪控制、灵活的拓展性和更高的可靠性，近几年微型逆变器发展迅速，但也存在着稳定性、转换效率、功率密度、使用寿命和成本上的挑战。阐述了微型逆变器设计中的要求与挑战，根据能量变换级数和母线类型的不同，将现有微型逆变器电路拓扑结构分成4类，详细介绍了各类拓扑结构的优缺点。综合考虑不同拓扑结构下微型逆变器的电路复杂程度、控制的难易度、能量转换效率的大小、成本高低以及寿命长短等指标，给出了微型逆变器未来的发展方向。 |
| 关键词: 光伏 微型逆变器 拓扑结构 直流母线 伪直流母线 高频母线 |
| DOI：10.16081/j.issn.1006-6047.2018.03.004 |
| 分类号:TM464;TM615 |
| 基金项目:国家自然科学基金资助项目(51577113)；上海市科委科技创新行动计划(17010500200) |
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| Research and analysis of photovoltaic micro-inverter topology |
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WANG Fei, XU Xinwei, WU Chunhua
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Shanghai Key Laboratory of Power Station Automation Technology, School of Mechatronics Engineering and Automation, Shanghai University, Shanghai 200072, China
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| Abstract: |
| Micro-inverters, which are different from conventional central and string grid-tied inverters, are usually connected to a single photovoltaic panel. Micro-inverters have been undergoing rapid development in recent years as a result of panel-level MPPT(Maximum Power Point Tracking) control, flexible expansion and enhanced reliability. However, several challenges in terms of stability, energy conversion efficiency, power density, life span and cost are still noticeable. The design requirements and challenges of micro-inverter are illustrated, and the existing micro-inverter topologies are divided into four categories based on the energy conversion stages and bus types. In addition, the advantages and disadvantages of all types of topologies are clarified. Considering the circuit complexity, control difficulty, energy conversion efficiency, cost and life span under different topologies comprehensively, promising development tendency of micro-inverters is summarized. |
| Key words: photovoltaic micro-inverter topology DC bus pseudo DC bus high frequency bus |
