摘要
结构保持模型下的电力系统暂态稳定分析方法表明 ,在大扰动下 ,一旦系统失去稳定 ,通常表现为在系统的薄弱环节 ,即临界割集处“撕裂”。临界割集的识别往往要依赖于事故后的轨迹 ,且需要大量的暂态稳定仿真计算。在计及网络结构参数和运行参数对系统暂态稳定性影响的同时 ,提出一种基于网络稳态参数的评价网络中各输电元件稳定度的指标 ,从而可以在事故前有效识别出临界割集 ,避免了大量的仿真计算。在华中电网六机二十五节点系统上得到很好的验证。
Power system transient stability analysis shows that once the system loses stability subjected to large disturbance,the network always divides from the vulnerable place called critical cutset.The identification of critical cutsets usually depends on the post fault trajectory,and also needs a lot of transient stability calculations.Taken into account the influence of structural and operational parameters on transient stability,this paper puts forward a kind of stability index based on steady state parameters to access the stability of the elements in the network,by which we can effectively identify the critical cutsets.The proposed method has been demonstrated by an example of 6 machine system.
出处
《东北电力学院学报》
2003年第1期1-5,共5页
Journal of Northeast China Institute of Electric Power Engineering
基金
国家自然科学基金资助项目 (5 99770 0 1)
