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基于平方和规划的两级级联DC/DC变换器系统大信号稳定性分析

Large-Signal Stability Analysis of Two-Stage Cascaded DC/DC Converter Systems Using Sum-of-Squares Programming

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中文摘要

针对两级级联DC/DC变换器系统,现有稳定性分析方法存在局限性。本文提出了一种基于李雅普诺夫稳定性理论和平方和(SOS)规划的大信号稳定性分析方法,能够有效评估系统在大信号扰动下的稳定性,并确定其稳定运行区域。

English Abstract

The large-signal stability analysis of two-stage cascaded dc–dc converter systems is still a troublesome problem due to various limitations of existing stability analysis methods. To address this problem, a large-signal stability analysis method based on Lyapunov's stability theory and the sum-of-squares programming technique is proposed. With the proposed method, one can not only obtain the maxim...
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SunView 深度解读

该研究对于阳光电源的储能系统(如PowerTitan、PowerStack)及光伏组串式逆变器中的DC/DC级联架构具有重要指导意义。储能PCS通常涉及多级功率变换,在大功率应用场景下,级联系统的阻抗匹配与大信号稳定性是保障系统可靠性的核心。该方法能够帮助研发团队在设计阶段更精准地评估系统在电网波动或负载突变下的稳定性边界,优化控制参数,从而提升阳光电源产品在复杂电网环境下的鲁棒性,减少现场运行故障风险。