区域电网内弱联机群摆动对互联系统功角稳定性的影响  

The Effect of the Angle Swing of Weak-connection Generator Groups in a Regional Grid to the Angle Stability of the Interconnected Power System

作　　者：顾卓远[1] 汤涌[1] 孙华东[1] 易俊[1] 何剑[1] 安之[1] 

机构地区：[1]中国电力科学研究院,北京市海淀区100192

出　　处：《中国电机工程学报》2015年第6期1336-1343,共8页Proceedings of the CSEE

基　　金：国家电网公司大电网重大专项资助项目课题(SGCC-MPLG001-2012)~~

摘　　要：基于三机等值系统,从区域内部发电机群摆动对等值电势的影响入手,探讨研究大互联电网暂态稳定新特征。分析表明,扰动后区域内部机群会相互摆动,导致等效电势幅值变动,使互联系统功率特性产生变化,从而影响到系统暂态稳定能力。其中,当区域内功角超前机群受扰严重时,互联系统更容易发生功角稳定问题。因此在研究大互联系统暂态稳定性问题时,并不能简单地用故障期间冲击能量衡量系统暂态稳定受扰严重程度,还需分析区域机群相互摆动给系统暂态稳定所带来的影响。This paper studies some transient stability characteristics of interconnected power systems based on a three-machine equivalent system. The impact of generator group angle swing on equivalent potential in a regional grid is taken into account. The analysis indicates that the post-disturbance generator group angle swing in a regional grid can affect the amplitude of equivalent potential, which leads to the change of transient stability of interconnected systems. Furthermore, that angle instability of interconnected systems will easily occur in case that the advanced generator group encounters severe disturbances. Therefore, the severity of transient stability cannot be just reflected by the energy of disturbance. And it should also analyze the impact of generator group angle swing on transient stability in a certain region especially addressing the issue of large interconnected systems.

关 键 词：区域电网 互联电力系统 弱联系 暂态稳定 

分 类 号：TM72[电气工程—电力系统及自动化]