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考虑励磁顶值与PSS的混沌和分岔现象
引用本文:贾宏杰,余贻鑫,王成山.考虑励磁顶值与PSS的混沌和分岔现象[J].电力系统自动化,2001,25(1):11-14.
作者姓名:贾宏杰  余贻鑫  王成山
作者单位:天津大学电气自动化与能源工程学院, 天津 300072
基金项目:国家重点基础研究专项经费资助项目! (G19980 2 0 30 7
摘    要:电力系统中的混沌对传统的稳定分析和安全控制而言,是一个巨大的挑战。文中研究了发电机励磁顶值和PSS回路对电力系统的振荡失稳和混沌现象的影响。研究表明,当计及励磁顶值极限时,或在PSS参数配置合理情况下,可能导致系统Hopf分岔(HB)现象不出现或HB点与鞍--节分岔(SNB)点十分接近。由于在小扰动稳定框架下,HB出现是混沌产生的前提,HB不能出现时,混沌现象也将消失。合理配置PSS参数,可为系统提供正阻尼,从而能够显著抑制HB及混沌现象的产生。文中的研究也是作为找到有效抑制电力系统振荡失稳和混沌现象措施的一种有益尝试。

关 键 词:电力系统    混沌    非线性    分岔
收稿时间:1/1/1900 12:00:00 AM
修稿时间:1/1/1900 12:00:00 AM

THE CHAOTIC AND BIFURCATION PHENOMENA CONSIDERING POWER SYSTEMS EXCITATION LIMIT AND PSS
Jia Hongjie,Yu Yixin,Wang Chengshan Tianjin University,Tianjin,China.THE CHAOTIC AND BIFURCATION PHENOMENA CONSIDERING POWER SYSTEMS EXCITATION LIMIT AND PSS[J].Automation of Electric Power Systems,2001,25(1):11-14.
Authors:Jia Hongjie  Yu Yixin  Wang Chengshan Tianjin University  Tianjin  China
Institution:Jia Hongjie,Yu Yixin,Wang Chengshan Tianjin University,Tianjin300072,China
Abstract:Chaos in power systems is a big challenge to the conventional stability study and security control.In this paper, effects of hard lim it of the excitation and the loop of power system stabilizer PSS to the system oscillatory instability and chaos are studied.The research shows that when the lim it of the excitation is considered,or the parameters of PSS are adjusted properly,som e Hopf bifurcation HB m ay be disappeared or very close to the system saddle node bifurcation SNB .In sm all signal stability study the occurrence of HB is a precondition of the existing of chaos.If HB cannotoccur,the chaos will be disappeared.When appropriately adjusting PSS,the occurrence of the Hopf bifurcation and chaos can be prevented through generating a positive electrical m agnetic torque damping.The research in this paper is also a beneficial attem pt to find some m easures to prevent the oscillatory instability and chaos in power systems.
Keywords:power system s  chaos  nonlinearity  bifurcation
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