摘要
为故障后临界失稳的电力系统确定解列断面以平息系统振荡可以防止系统完全崩溃。文章首先在基于流形变换的方法预测电力系统临界失稳模式的基础上,用预测到的临界失稳模式对系统中的发电机进行分群;然后将系统接线图转化为节点带权的无向图,用图论的方法寻找应切除的支路集合,使得每个机群的不平衡功率最小,从而构成系统的解列面:最后采用新英格兰10机39节点系统作为算例,用预测到的临界失稳模式搜索、判断系统故障后的解列面。后续仿真表明,按上述方案解列系统能够尽快平息各机群的振荡。
It is possible to prevent collapse of whole post-fault power system, which is in critical unstable condition, by determining the splitting surfaces to calm down system oscillation. Firstly, on the basis of predicting the critical unstable mode of a power system by manifold transform method, the generators in this system are divided into some groups by above predicted critical unstable mode; secondly, the wiring diagram of the power system is u＇ansformed into no-direction diagram with weighted nodes, and the set of branches to be cut off is searched by the method based on graph theory to ensure the unbalanced power of each generator group minimal, thus the splitting surfaces of the system are constituted; finally, taking New England 10-machine 39-bus system for case the splitting surfaces of post-fault system are searched and judged by the predicted critical unstable mode. The follow-up simulation results show that the oscillation of each generator group can be calmed down as fast as possible by splitting the system with above scheme.
出处
《电网技术》
EI
CSCD
北大核心
2006年第5期44-48,共5页
Power System Technology
基金
国家自然科学基金重大项目(50595410)中国博士后科学基金资助项目(2004036455)。~~
关键词
电力系统
临界失稳模式
解列断面
Power systems Critical unstable modes
Splitting surface
