电网技术2012，Vol.36Issue(10)：172-177,6.
电力系统机电振荡的非线性现象
Study on Nonlinearity in Power System Electro-Mechanical Oscillation
摘要
Abstract
When a large-scale interconnected power system is disturbed by large or small disturbance, its electro-mechanical oscillations become one of the most important factors affecting the system stability. Based on general description of electro-mechanical oscillation and linear characteristic analysis, dynamic period, dynamic decay speed and nonlinearity are defined to characterize electro-mechanical oscillation occurred in nonlinear system. The influences of power system nonlinear characteristics on both shape and period of response trajectories are researched and on this basis the ultra-low frequency oscillation of power system is discussed; besides, the decay characteristics of nonlinear electro-mechanical oscillation are analyzed, Through the simulations of one oscillation mode, the difference of dynamic responses in a real nonlinear system and its linearized system are comprehensively illustrated and compared, and similarities and differences of responses of linear system and nonlinear system in shapes and properties are expounded.关键词
机电振荡/非线性系统/动态周期/动态衰减速度/非线性度Key words
electro-mechanical oscillations/ nonlinearity/ dynamic period/ dynamic decay speed/ nonlinear degree分类
信息技术与安全科学引用本文复制引用
赵雅博,张毅威,陈磊,闵勇..电力系统机电振荡的非线性现象[J].电网技术,2012,36(10):172-177,6.基金项目
国家自然科学基金资助项目(50877042). （50877042）
