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考虑开关纹波相互作用的级联系统稳定性问题

Stability Issue of Cascaded Systems With Consideration of Switching Ripple Interaction

语言:

中文摘要

本文探讨了级联变换器系统中的阻抗稳定性问题。研究指出,源变换器与负载变换器之间的开关纹波相互作用(SRI)会改变源变换器的PWM增益,进而影响系统的截止频率和相位裕度,对级联系统的稳定性分析提出了新的修正要求。

English Abstract

Impedance-based criteria are often used for assessing the stability of cascaded converter systems. In this paper, it is pointed out that the switching ripple interaction (SRI) between the source converter and the load converter in a cascaded system would change the gain of the pulsewidth modulation of the source converter, causing the cut-off frequency and the phase margin of the source converter ...
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SunView 深度解读

该研究对阳光电源的组串式光伏逆变器及PowerTitan/PowerStack储能系统具有重要指导意义。在光储耦合或多机并联场景下,变换器间的开关纹波耦合可能导致系统谐振或控制失稳。建议研发团队在iSolarCloud智能运维平台及逆变器控制算法中,引入考虑SRI效应的阻抗建模方法,优化弱电网下的并网控制策略,以提升产品在复杂电网环境下的稳定性和电能质量。