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DC-DC变流器带恒功率负载动态响应分析及级联系统稳定性预测

, PP. 84-91

Keywords: 级联系统,大信号稳定性,恒功率负载

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Abstract:

分布式多变流器模块系统广泛应用于航空航天、通信以及舰船的直流分布式电源系统中。尽管每一个标准模块都能稳定可靠运行,但由于模块间复杂的相互作用,系统还是会出现不稳定的情况。目前级联系统小信号稳定性已经得到了较为深入的研究,但大信号级联稳定性问题尚缺乏系统研究。本文在将后级变流器等效为恒功率负载的基础上,定量分析了前级变流器电路参数对系统稳定性的影响,给出了前级变流器电路参数的设计准则,并推导出保证前级变流器稳定工作的情况下所能承担的最大恒功率负载值。该结论可以为级联系统前、后级模块的匹配提供依据,确保模块级联后可以稳定工作,节省了选择模块时反复验证的计算过程,大大提高了设计效率。

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[20]  作者简介:杜韦静 女, 1985年生, 博士研究生, 主要研究方向电力电子系统集成。张军明 男, 1975年出生, 博士, 主要研究方向电力电子系统集成、电源管理及先进电力电子变流技术。

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