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集成共模与差模滤波器及电容电压前馈有源阻尼的单相无变压器光伏逆变器

Integrated Common and Differential Mode Filter With Capacitor-Voltage Feedforward Active Damping for Single-Phase Transformerless PV Inverters

语言:

中文摘要

本文研究了单相无变压器光伏逆变器中LCL滤波器的改进应用。通过将LCL滤波器配置为集成共模(CM)和差模(DM)滤波器,并结合电容电压前馈有源阻尼技术,有效提升了系统的滤波性能与稳定性,解决了无变压器拓扑中的漏电流与电磁干扰问题。

English Abstract

Recently, several publications have discussed the design of LCL filters and current controllers for grid-connected converters. However, the focus was the LCL filter used as a differential mode (DM) filter. Besides its conventional application as DM filter, a modified LCL filter configuration can be used as an integrated common mode (CM) and DM filter, which is particularly interesting for transfor...
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SunView 深度解读

该技术对阳光电源的户用及组串式光伏逆变器产品线具有重要参考价值。无变压器拓扑是提升逆变器效率和减小体积的关键,但漏电流问题一直是行业痛点。通过集成CM/DM滤波器设计,可以在保证电磁兼容性(EMC)的前提下进一步优化系统功率密度。建议研发团队在下一代户用逆变器设计中引入该有源阻尼控制策略,以提升系统在弱电网环境下的稳定性,并降低对磁性元件尺寸的要求,从而进一步降低产品成本并提升市场竞争力。