基于Melnikov方法的电力系统混沌振荡参数计算  

Computation of Chaotic Oscillation Parameter in Electrical Power System Based on Melnikov Method

作　　者：朱志宇[1] 蔡立勇[1] 刘维亭[1] 

机构地区：[1]江苏科技大学电子信息学院,镇江212003

出　　处：《电力系统及其自动化学报》2008年第3期41-45,共5页Proceedings of the CSU-EPSA

基　　金：国防基础预研项目资助(A3820061202);船舶行业国防预研基金项目资助(2.6.7)

摘　　要：为了研究大干扰下电力系统中的混沌振荡,提高电力系统的稳定性,分析了非线性三参数二机电力系统振荡的异宿分支,给出了Melnikov函数的计算方法,推导出了Melnikov函数具有简单零点的条件,获得了电力系统发生混沌振荡的锥形参数区域和带形参数区域,从而阐明了二机电力系统产生混沌振荡的机理,得到了定量化的参数条件,为准确判断混沌振荡和提高大偏差状态下电力系统的稳定性提供了计算依据。最后通过仿真实验证实了当系统所受到的周期性负荷扰动足够大时,电力系统将出现混沌振荡。For researching chaotic oscillation in large scale interference power system and enhancing its security,a method to calculate Melnikov was propsed,which analyzed heteroclinic bifurcation of oscillation in nonlinera three-parameter two-generator power system and inferred the condition that Melnikov function have simple zero result. The cone region and belt region of parameters in chaotic oscillation were obtained with the proposed function. The mechanism and parameter condition of chaotic oscillation in two-generator power system were illustrated,which provided computational method to correctly judge whether there were chaotic oscillations in electrical power system and enhanced security of nonlinear power system with large running deviation. Simulation results indicate that chaotic oscillation occurs under enough strong periodic load perturbation.

关 键 词：混沌振荡 二机电力系统 MELNIKOV函数 异宿分支 

分 类 号：TM712[电气工程—电力系统及自动化]