摘要
按照定常两机电力系统平衡点的属性,将其轨迹分类为稳定的结点、不稳定的结点、稳定的焦点、不稳定的焦点和鞍点这5种不同运动模式。利用互补群惯量中心(CCCOI):R”→R^2保稳映射将实际多机受扰轨迹映射为时变的两机等值轨迹,进而分析后者如何由对应于上述运动模式的多个轨迹段构成,并用符号序列反映其微观结构。以电力系统从一连串的滑步进入再同步为例,研究了多机电力系统的后期动态行为会随着参数的细微变化而显著改变的现象。如果一段具有鞍点特性的相轨迹的起始点从稳定流形的一侧变到另一侧,那么不论系统参数的变化多么细微,其后继轨迹将有完全不同的动态。
According to the character of the equilibrium point of the complementary-cluster center-of-inertia mapping system, the trajectories of the two complementary clusters of generators can be classified into five kinds of modes, namely stable-node, unstable-node, stable-focus, unstable-focus and saddle. Therefore, microscopic structures of the trajectories can be analyzed. Taking resynchronization after a series of slips as an example, the mechanism of multi-machine dynamical changes with imperceptible variety of parameter is analyzed. No matter how little a parameter changes, if and only if the starting point of a saddle-mode section on the phase plane changes from one side of the stable manifolds to the other side, the dynamics afterwards is entirely different.
出处
《电力系统自动化》
EI
CSCD
北大核心
2003年第23期1-5,共5页
Automation of Electric Power Systems
基金
国家重点基础研究专项经费资助项目(G1998020301)
国家自然科学基金(10272031)
