摘要
根据结构保持的多机电力系统模型分析了电力系统大扰动后暂态能量在网络中的分布特性,重点研究了故障后系统振荡中心处暂态能量的变化规律,在单机系统中给出了证明,并在多机系统中进行了仿真验算。研究结果表明:随着系统稳定程度的恶化,系统的振荡中心附近是故障后暂态能量冲击最严重的区域,系统沿振荡中心所处的割集“撕裂”。
Based on Structure Preserving Model (SPM) for multi-machine power system, the feature of transient energy distributed in post-fault power system is analyzed, and the variation law of transient energy around the oscillation center of the post-fault power system is emphatically studied. This law is proved by one machine-infinite bus system and simulated by multi-machine power system. The simulation results show that along with the deterioration of power system stability degree, the region around the oscillation center will bear most severe impact of transient energy and the power system will be split into two subsystems along the cutset where the oscillation center locates.
出处
《电网技术》
EI
CSCD
北大核心
2005年第8期30-34,共5页
Power System Technology
基金
国家自然科学基金资助项目(59977001)~~
关键词
电力系统
暂态稳定性
振荡中心
暂态能量
电网
Computer simulation
Deterioration
Electric fault currents
Oscillations
Stability
Transients
