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宽输入与负载变化下的多电平LCC谐振AC-DC变换器建模

Modelling a Multilevel LCC Resonant AC-DC Converter for Wide Variations in the Input and the Load

语言:

中文摘要

本文针对高功率、高输出电压应用场景,研究了一种由三相电网供电的DC-DC谐振变换器。针对整流后输入电压在400V至750V之间大幅波动带来的设计挑战,分析了其对开关频率及电流损耗的影响,并提出了一种多电平LCC谐振拓扑以优化宽范围运行下的系统效率与性能。

English Abstract

Several applications need a high power, high output voltage ac/dc converter. The structure includes a dc/dc resonant stage, which is fed from a three-phase line. Due to standards, rectified dc input voltage varies largely from 400 to 750 V affecting the adversely overall design and current levels. In fact, losses in the inverter become unbearable if both switching frequency and transferred power a...
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SunView 深度解读

该研究涉及的多电平LCC谐振拓扑对阳光电源的组串式逆变器及储能PCS(如PowerTitan系列)具有重要参考价值。在光伏及储能系统中,输入电压(光伏组串或电池组)往往存在宽范围波动,该拓扑能有效提升宽电压范围下的变换效率,降低开关损耗。建议研发团队关注该多电平谐振技术在提升功率密度及应对高压直流侧波动方面的应用,特别是在大功率储能变流器中,可作为优化效率曲线、减小磁性元件体积的潜在技术路径。