中文摘要：

在电力系统变换器优化设计的研究中,针对直流分布式系统中变换器稳定性问题,提出了一种基于输入输出阻抗分析稳定性的方法。以常见的基本Boost DC/DC变换器为例,采用电压前馈控制,对变换器的输入输出阻抗进行建模。在连续导电模式（continuous conduction mode,CCM）下分析了小信号模型Boost DC/DC变换器输入输出阻抗的特性,研究影响阻抗变化的因素。在上述基础上,根据阻抗比稳定性判据,为直流分布式系统变换器级联设计及稳定性分析提供参考依据。

英文摘要：

For the stability of the converter in the DC distributed system, a method of stability analysis based on the input and output impedance is presented. Taking the common basic Boost DC/DC converter in the system for ex- ample, the input and output impedances of the converter with voltage feedforward control are modeled. The input and output impedance characteristics of the converter under small signal model are studied in continuous conduction mode. And the factors affecting the impedances are discussed. On this basis, it provides reference bases to design the cascade converters of the I）C distributed system and analyze the stability of the system by the impedance ratio cri- teflon of stability.