Impedance specifications for stable DC distributed power systems
Impedance specifications for stable DC distributed power systems
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DOI：
10.1109/63.988825
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发表时间：
2002-08
影响因子：
6.7
通讯作者：
Xiaogang Feng;Jinjun Liu;F. Lee
中科院分区：
文献类型：
--
作者：
Xiaogang Feng;Jinjun Liu;F. Lee
在直流分布式电源系统中，单独设计的电源模块/子系统之间的相互作用可能导致整个系统的不稳定。在小信号意义上，系统级稳定性由阻抗比Z/sub o//Z/sub i/确定。这里，Z/sub是源模块/子系统的输出阻抗，并且Z/sub是负载模块/子系统的输入阻抗。因此，防止系统不稳定的有效方法是定义模块/子系统的阻抗规格。本文简要地总结了现有的工作，并介绍了作者在定义阻抗规格方面的贡献。提出了S平面上阻抗比Z/sub o//Z/sub i/的一个新的禁区作为系统稳定裕度要求。在此基础上，建立了各个负载的阻抗规范。此外，一个非常实用的测量方法来检查是否满足系统的稳定裕度要求的禁区。
In a DC distributed power system, the interaction between individually designed power modules/subsystems may cause the instability of the whole system. In a small-signal sense, system level stability is determined by the impedance ratio Z/sub o//Z/sub i/. Here, Z/sub o/ is the output impedance of the source module/subsystem, and Z/sub i/ is the input impedance of the load module/subsystem. As a result, an effective way to prevent system instability is defining impedance specifications for modules/subsystems. This paper briefly summarizes existing works and introduces the authors' contribution in defining impedance specifications. A new forbidden region for impedance ratio Z/sub o//Z/sub i/ on the S-plane is proposed as the system stability margin requirement. Based on this proposed forbidden region, the impedance specifications of individual loads are established. Further, a very practical measurement approach is developed to examine whether or not the system stability margin requirement of the forbidden region is satisfied.