电力系统次同步振荡的分岔分析  

Analysis of subsynchronous resonance in power system based on bifurcation theory

作　　者：罗成[1] 江全元[1] 程时杰[1] 彭晓涛[1] 

机构地区：[1]华中科技大学电气与电子工程学院,湖北武汉430074

出　　处：《中国电力》2004年第7期4-8,共5页Electric Power

基　　金：国家重点基础发展规划(G1998020319);国家"九五"攀登计划(PD9521907)

摘　　要：基于非线性系统分岔理论,分析电力系统次同步谐振现象。利用通用的连续和分岔软件-AUTO,分析一个含串联补偿的电力系统次同步谐振(SSR)中的分岔现象。从非线性分岔角度揭示出SSR产生的原因是系统发生分岔后不稳定的极限环导致。当发生电力系统次同步谐振时,可能会产生环面分岔和周期折叠分岔等一系列复杂的周期轨道分岔。时域仿真的结果验证了分岔分析结果的有效性。In this paper a tutorial introduction to bifuration theory and the applicability of this theory to study SSR phenomenon in power system are explored. The continuation and bifurcation software AUTO97 is applied to investigate the SSR in a Single-Machine-Infinite- Busbar power system with series capacitor compensation. The results show that the mechanism of SSR is the result of unstable limit cycle after bifurcation. When the system exhibits SSR, some complex period orbit bifurcations, such as torus bifurcation and period fold bifurcation, maybe happen with the variation of limit cycle. The time-domain simulation results validate the effectiveness of bifurcation analysis.

关 键 词：电力系统 电压稳定 分岔分析 次同步振荡 动态特性 非线性系统 

分 类 号：TM712[电气工程—电力系统及自动化]