摘要
基于李雅谱诺夫直接法对电力系统的暂态频率稳定进行了分析,指出系统在大干扰下,频率的暂态稳定性与发电机组的原动机运行在静特性的位置紧密相关,求得了暂态稳定的临界频率和吸引域估计值。分析结果表明,运行在静特性的低频段时,如果系统频率低于临界频率,将发生频率暂态失稳。该研究有助于电力系统设计运行的人员了解系统频率的暂态运行特性,采取措施防止系统暂态频率失稳。
In this paper,the power system transient frequency stability is analyzed by Lyapunov direct method.It is pointed out the transient stability of the frequency is closely related to the position of the static characteristics of prime mover of generator under large disturbance,And if the system frequency is lower than the critical frequency,the frequency transient instability will occur when the system operates in the low frequency band with static characteristics.The critical frequency of transient stabilization and the estimated value of the attraction domain are obtained.It is of great significance to understand the transient operation characteristics and take measures to prevent the transient frequency instability for system design and operation personnel of power system.
作者
成连生
CHENG Liansheng(State Grid Hunan Electric Power Company Limited,Changsha 410007,China)
出处
《湖南电力》
2021年第4期23-26,37,共5页
Hunan Electric Power
关键词
电力系统
李雅普诺夫直接法
暂态频率稳定
power system
Lyapunov direct method
transient frequency stability
