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基于小信号模型的船舶中压直流发电系统稳定性分析

DOI: 10.13334/j.0258-8013.pcsee.2015.08.012, PP. 1930-1939

Keywords: 船舶综合电力推进,中压直流,小信号模型,稳定性分析,特征值轨迹

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Abstract:

为解决船舶中压直流综合电力推进系统的发电系统带恒功率负载存在的电压不稳定问题,采用基于小信号模型的特征值分析的方法,提出一种恒阻感支路同步发电机电压源(voltage-behind-reactance,VBR)模型结合二极管整流器平均值模型的建模方法,通过加入低通滤波器,解决了系统无法直接构成常微分方程的问题,建立了发电系统非线性常微分方程模型,数字仿真验证了其准确性。基于常微分方程模型建立系统的小信号模型,通过分析平衡点的特征值轨迹的方法实现了发电系统的稳定分析。对系统在不同的输入以及设计参数变化情况下的稳定性进行分析,得到了稳定区域,通过定量的数字仿真和定性分析相结合的方式验证了结果的正确性。

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