直流分布供电系统稳定性的分析与仿真

Analysis and Simulation of Stability in DC Distributed Power Systems

研究供电系统稳定性优化问题,针对直流分布供电系统中单独设计的功率模块级联后引起整个系统不稳定。由于系统连接,造成系统稳定性下降。为解决上述问题,提出了一种通过测量直流分布供电系统的稳定余度来判断系统稳定性的方法。在分析传统的判定稳定性方法缺点的基础上,根据Middlebrook判据,提出了禁止区域的概念,并进一步简化,推导出测量稳定余度的方法来判断级联系统的稳定性,并在SABER环境下对BOOST供电系统功率因数校正电路的稳定性。实验结果表明,方法能较为简便的判断直流分布供电系统的稳定性,同时对于其它供电系统的稳定性分析均有较好的参考价值。

This paper made a study of optimization of the power system instability caused by cascading the individ- ually designed power modules in DC distribution system. For the decreasing stability of the cascading system, the pa- per deduced a measurement method by using the stability margin of a dc distributed power system to determine the stability of the system. Basing on analyzing the shortcomings of the stability of the traditional method, we put forward the concept of a ban on the area according to the Middle brook criterion, and after further simplified, we deduced the method of measuring stability redundant to judge the stability of a cascade system. In the SABER environment by u- sing this method to BOOST power factor correction circuit stability of analysis, the simulation and experimental results show that this method can simply judge dc distribution system＇ s stability, and at the same time, it has a good refer- ence value for other system＇s stability analysis.