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无变压器三相光伏系统四桥臂逆变器的漏电流抑制

Leakage Current Elimination of Four-Leg Inverter for Transformerless Three-Phase PV Systems

语言:

中文摘要

本文研究了无变压器三相光伏系统中四桥臂逆变器的漏电流抑制问题。通过建立共模回路模型,明确了漏电流的产生机理,并分析了不同载波调制方法对漏电流的影响,旨在通过拓扑与控制优化提升系统安全性与电磁兼容性。

English Abstract

Eliminating the leakage current is one of the most important issues for transformerless three-phase photovoltaic (PV) systems. In this paper, the leakage current elimination of a three-phase four-leg PV inverter is investigated. With the common-mode loop model established, the generation mechanism of the leakage current is clearly identified. Different typical carrier-based modulation methods and ...
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SunView 深度解读

该研究直接针对无变压器光伏并网技术,对阳光电源的组串式逆变器(SG系列)产品线具有重要参考价值。在追求高功率密度和高效率的趋势下,无变压器拓扑是主流,但漏电流抑制是行业痛点。通过四桥臂拓扑及相关调制策略的研究,可有效降低系统共模噪声,提升产品在复杂电网环境下的可靠性与安规合规性。建议研发团队关注该拓扑在三相组串式逆变器中的应用潜力,以进一步优化产品体积与电磁干扰(EMI)性能。