应用分岔理论分析SVC对电力系统电压稳定性的影响  

The influence of SVC on voltage stability of power system based on bifurcation theory

作　　者：杨秀[1] 金红核[2] 郭晨吉[3] 陈雨[1] 陈鸿煜[3] 

机构地区：[1]上海电力学院电力工程系,上海200090 [2]上海市电力公司超高压输变电公司,上海200064 [3]上海大学自动化系,上海200072

出　　处：《电力系统保护与控制》2009年第7期7-11,94,共6页Power System Protection and Control

基　　金：上海市教委重点学科建设项目(J51301)

摘　　要：基于分岔理论的电力系统电压稳定分析对于深入理解电压失稳机理有重要意义,特别是对于灵活交流输电系统,如静止无功补偿器等,分岔理论能够有效分析系统的动态控制特性对电压稳定的影响。利用非线性动力系统的分岔理论,使用通用分岔分析软件AUTO2000对典型的含SVC系统和不含SVC系统进行电压稳定的分析,得出了系统在两种情况下的分岔点数值。研究发现,通过添加静止无功补偿器(SVC),可以延迟系统的Hopf分岔点和鞍结分岔点,增加负荷极限,从而提高了系统电压稳定性。之后又通过双参数分岔分析确定了两维分岔边界。结果表明,在使用SVC控制器提高系统电压稳定性时,要详细考虑其参数对系统中各种分岔的影响,综合优化控制器的设计和安装。The bifurcation study of power system voltage stability has an important role in understanding the voltage unstable process deeply. Especially for flexible AC system（FACTS）, such as static Var compensator （SVC）, the bifurcation study can analyze the impact of dynamic control performance on voltage stability. In this paper, the bifurcation analysis software AUTO2000 is used for the comparative study for power system with and without SVC, and the bifurcation point and bifurcation behavior on the point is studied. Then with double parameters bifurcation analysis, the bifurcation boundary is obtained. The studied results show that with SVC, the SNB and Hopf bifurcation （HB） point can be delayed, which mean that SVC can add load limit to improve voltage stability. But the SVC control parameters have important influence on voltage stability, so the control parameters need be adjusted carefully.

关 键 词：电压稳定 鞍结分岔 HOPF分岔 静止无功补偿器 

分 类 号：TM712[电气工程—电力系统及自动化]