摘要
运用最简正规形理论,推导了电力系统原始微分方程模型鞍结分岔的2阶最简正规形,通过更高阶的变换,解决了共振项系数奇异的问题;利用近似解析解对电力系统鞍结分岔引起的系统失稳现象进行了分析;利用参与因子分析了共振模态对其他模态的影响,揭示了电力系统鞍结导致系统失稳的物理机制。由于共振模态的影响,鞍结分岔在引起电压崩溃的同时,也出现功角失稳。这对于深刻认识鞍结分岔导致系统失稳的机制有一定价值。
Utilizing the theory of the simplest normal form, the second order simplest normal form at the saddle-node bifurcation point in original differential equation model of power system is derived, and through the higher order transform the problem of singular resonance coefficient is solved; using approximate analytic solution, the system instability caused by saddle-node bifurcation in power system is analyzed; utilizing participation factors, the influences of resonance modes on other modes are analyzed, and the physical mechanism of system instability caused by saddle-node in power system is revealed. Due to the influence of resonance modes, the angle instability occurs while the voltage collapse is caused by saddle-node bifurcation.
出处
《电网技术》
EI
CSCD
北大核心
2012年第8期182-186,共5页
Power System Technology
关键词
最简正规形
鞍结分岔
参与因子
电压稳定
功角稳定
the simplest normal form
saddle-node bifurcation
participation factors
voltage stability
angle stability
