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基于三电平Boost变换器的光伏发电系统电压不平衡抑制系统研究

Proposed System Based on a Three-Level Boost Converter to Mitigate Voltage Imbalance in Photovoltaic Power Generation Systems

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中文摘要

针对光伏发电系统中的电压不平衡问题,本文提出了一种基于三电平Boost变换器的模块化结构。该拓扑相比传统Boost变换器,具有更低的电流纹波和电压应力,能够有效补偿额外增加的电路元件成本,适用于提升光伏系统的整体效率与稳定性。

English Abstract

Voltage imbalance poses a challenge to photovoltaic systems. A modular structure based on a three-level boost converter is proposed to address this problem. The three-level boost converter offers advantages, such as a low current ripple and voltage stress, over a classic boost converter. These advantages offset the use of additional elements in the proposed converter circuit. Two capacitors are us...
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SunView 深度解读

该研究提出的三电平Boost拓扑与阳光电源的核心产品线高度契合。在组串式逆变器(String Inverters)中,随着光伏组件电压等级的提升,采用三电平技术能显著降低功率器件的电压应力,从而选用更具性价比的器件,并减小电感体积。此外,该方案对解决多路MPPT输入下的电压不平衡问题具有参考价值,可优化阳光电源大功率组串式逆变器的前端DC-DC级设计,提升系统在复杂阴影遮挡条件下的发电效率和长期运行可靠性。