基于全状态直流模型的交直流系统稳定域相图分析  

Phase portrait analysis of AC/DC power system stability region based on a full state DC model

作　　者：屠竞哲[1] 甘德强[1] 辛焕海[1] 曹军[2] 

机构地区：[1]浙江大学电气工程学院,浙江杭州310027 [2]贝尔法斯特女王大学电子电气工程和计算机科学学院

出　　处：《电力系统保护与控制》2012年第21期58-66,共9页Power System Protection and Control

基　　金：国家重点基础研究发展计划(973计划)资助项目(2004CB217902);国家自然科学基金重大项目(50595411)~~

摘　　要：交直流系统是一个切换系统,其稳定域非常复杂,相关研究几乎空白。提出包含完整直流运行状态的全状态直流模型,很好地模拟了交直流系统固有的切换特性。计算了单机无穷交直流全状态系统在不同直流运行方式下的相图,分析了单机无穷交直流全状态系统的稳定域特性以及子系统切换规律,并与单机无穷纯交流系统以及单机无穷交直流简化系统的特性作对应比较。结果表明,完整的直流运行状态以及子系统的切换特性使得单机无穷交直流全状态系统具有非常复杂的稳定域特性,研究成果可以为交直流系统稳定域研究提供一定参考,但仍需进一步的深入分析。AC/DC system is a switched system, its stability region is very complex, so far little has been known about the stability region of such systems. In the study, a full state DC model which includes complete DC operation modes is proposed, which nicely describes the inherent switching characteristics of AC/DC systems. In this paper, the phase portraits of the SMIB AC/DC full state system under different DC operation modes are calculated, the stability region characteristics and subsystem switching laws of the SMIB AC/DC full state system are analyzed, and the related characteristics of the SMIB AC system and the SMIB AC/DC simplified system are compared. The results demonstrate that the complete DC operation modes and the subsystem switching characteristics make the SMIB AC/DC full state system have very complicated stability region characteristics. The study results can provide some references to the related research on the stability region of AC/DC systems, but still needs further detailed analysis.

关 键 词：稳定域 切换系统 相图 全状态直流模型 单机无穷交直流全状态系统 

分 类 号：TM712[电气工程—电力系统及自动化]