摘要
通过对单机无穷大系统和等值两机系统进行数学推导,得出系统惯量的变化与互联系统暂态稳定水平的关系;应用EUROSTAG进行时域仿真,在IEEE-39系统中分别验证了受端与送端系统转动惯量对弱互联电网暂态稳定性的影响。系统惯量越大,系统相对角变化速度越慢,在大区弱互联系统中,送端系统与受端系统间相对角变化速度不一致。因此,当送端系统惯量增加时,提高了系统暂态稳定水平;受端系统惯量增加时,降低了系统暂态稳定水平。
In this paper, single machine infinite system and equivalent two machine system are analyzed to indicate the relationship between the inertia and the transient stability of the system. It＇s analyzed by a time-domain simulation using EUROSTAG and validated the importance of the inertia in weak interconnect systems in IEEE-39. The greater the inertia of the system, the slower system relative angles change, in weak connected systems, the send subsystem and end subsystem with weak links, relative angles between two subsystems change differently ,so inertias of subsystems affect the transient stability of the system dissimilarly.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2009年第15期42-47,共6页
Power System Protection and Control
关键词
系统惯量
弱互联系统
暂态稳定
system inertia
weak interconnect system
transient stability
