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船舶电力推进系统稳定性分析

DOI: 10.3969/j.issn.1006-7043.201309043

Keywords: 船舶电力推进系统, 低频振荡, 小扰动, 系统稳定性, 不稳定区域

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Abstract:

为获得变频驱动感应电机调速系统低频振荡产生的原因, 以实验室一套船舶电力推进系统为例展开研究。建立了基于小扰动的感应电机、变频器及船舶电力推进系统的数学模型, 分析了死区时间对系统稳定性的影响。利用根轨迹分析方法, 通过解析计算与仿真分析绘制了系统的不稳定区域。讨论了电机定子电阻和漏感变化对系统稳定区域的影响, 进行了试验验证, 试验结果与解析计算得到的不稳定区域吻合较好, 证明所建立的船舶电力推进系统小扰动数学模型以及采用的系统稳定性分析方法是正确可行的。

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