摘要
介绍电网直流大规模发展导致送端电源输送网架薄弱,大扰动动态稳定突出的问题。建立了两机等值系统,分析了系统大扰动动态稳定的机理,指出电网经受大扰动后会降低稳定裕度,恶化系统动态性能,而自并励励磁系统会进一步削弱系统阻尼,引发系统振荡。通过实际电网的仿真分析,指出PSS参数的正确配置能极大地提高大扰动条件下系统的动态稳定水平。
With large-scale development of HVDC in CSG, the transmission network frame of power sources in the sending terminal are relatively weak, and the dynamic stability problem following large disturbances is prominent. The article establishes two-machine equivalent system, and analyzes the mechanism of the dynamic stability of power system following large disturbances. It points out that large disturbances reduce stability margin of power grid, and worsen the system dynamic performance. And the self-shunt excitation system further weakens system damping and triggers system oscillation. Through the simulation analysis of the actual power grid, it points out that the correct configuration of PSS parameters can greatly improve the dynamic stability of the system following large disturbances.
作者
吴小珊
涂亮
柳勇军
刘蔚
吴为
赵睿
WU Xiaoshaxl;TU Liang;LIU Yongjun;LIU Wei;WU Wei;ZHAO Rui(Research Institute of China Southern Power Grid,Guangzhou,510080)
出处
《云南电力技术》
2018年第3期41-45,共5页
Yunnan Electric Power
关键词
电力系统
动态稳定
自并励励磁系统
阻尼
PSS
Power systems
dynamic stability
self-shunt excitation system
damping
PSS
