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无变压器双接地逆变器先进拓扑综述

Overview of Recent Advanced Topologies for Transformerless Dual-Grounded Inverters

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中文摘要

本文综述了无变压器逆变器拓扑,重点探讨了传统H桥逆变器中高频共模电压导致的漏电流问题。文章分析了双接地逆变器作为一种替代方案,通过将输入端与输出端接地连接,有效抑制共模电流,提升系统安全性与效率,并总结了该领域最新的先进拓扑结构。

English Abstract

Transformerless inverters, most of which are H-bridge inverters, have been widely used and studied in grid-connected power systems in the last decades. However, the H-bridge inverter is affected by the low- and high-frequency common-mode voltage between the input and output terminals, resulting in a large common-mode leakage current. An alternative solution is to connect the ground of the input te...
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SunView 深度解读

该研究直接针对光伏逆变器核心痛点——共模漏电流问题,对阳光电源的组串式逆变器(如SG系列)和户用逆变器产品线具有极高的参考价值。通过采用双接地拓扑,可以进一步优化逆变器在严苛环境下的漏电流抑制能力,提升安规性能。建议研发团队关注文中提到的新型拓扑,评估其在提升功率密度和降低EMI滤波器成本方面的潜力,从而优化光伏逆变器产品的设计方案,增强在分布式光伏市场的竞争力。