An on-line weak-connection identification method for controlled islanding of power system

作者：Ni Jingmin^*; Shen Chen; Li Ying; Tan Wei

来源：Proceedings of the CSEE, 2011, 31(4): 24-30.

• Islanding
• Power grid
• Power system
• Slow coherency
• Weak-connection

The weakly-connected ties in a power system are determined by the system';s topology and real-time operating state. When cluster instability occurs, the interface among the out-of-step generator groups will mainly distribute among these weakly-connected ties. In islanding control, it is imperative to identify the weakly-connected ties in the system and search for the splitting cut-sets among these weakly-connected ties. Based on the slow coherency theory, this paper analyzed the sensitivity of slow mode eigenvalues to line parameters and proposed a novel method for the identification of weakly-connected ties. The analytical expression of the sensitivity of eigenvalues on line parameters was derived and the detailed steps of weakly-connected ties identification were designed. The effectiveness of this method was demonstrated through case studies on a test system and the East-China grid. Finally, the paper also discussed how to apply the method in practical engineering. ? Chin. Soc. for Elec. Eng.

• 出版日期2011
• 单位清华大学