微型光伏逆变器拓扑及相关技术研究综述

Review of Photovoltaic Micro-Inverter Topology and Related Technologies

本文主要对光伏发电系统中的微型逆变器拓扑进行了综述,旨在寻找能够降低成本并提升效率与可靠性的最佳方案。介绍了微型逆变器的并网优势及其设计目标。结合国内外研究现状,分析了典型的单级式和多级式逆变器拓扑,阐述了各自优缺点。针对微型逆变器中存在的各种问题,分别对功率解耦技术、漏电流的消除、以及新型功率器件的应用进行了研究,以实现逆变器低成本、高效率、寿命长的目标。通过对各类逆变器拓扑的总结与归纳,展望了未来的研究方向与发展前景。

In order to find the best solution to reduce costs and improve efficiency and reliability of mi-cro-inverter, topologies of micro-inverter in photovoltaic power generation system are reviewed in this paper. Firstly, the advantages of grid-connected micro-inverter and its design objectives are introduced. Combined with the research status at home and abroad, this paper analyzed the typical single-stage and multi-stage micro-inverter topologies, and their advantages and disadvantages are discussed. Aiming at problems existing in micro-inverter, power decoupling technique, elimination of leakage current, and application of novel power devices were studied in order to achieve the goal of low cost, high efficiency, and long life. Through the summary and induction of all kinds of inverter topology, the research direction and future prospects of development are expected in this paper.