【摘要】 用于电力系统暂稳分析的结构保持法可以分析输电网络对系统暂态稳定的影响，但早期的结构保持法未对割集进行有效的分类，需对输电网络中的全部割集计算其脆弱性指标，才能进行稳定评价。将其应用于实际电力系统时会遇到计算量大的问题。为改进早期的结构保持模型，本文给出了临界割集组的定义，提出了搜索临界割集的算法，借此不仅提高了割集的搜索效率，而且计及暂稳与故障位置的相关性。更多还原

【Abstract】 The Structure Preserving Model (SPM) for transient stability analysis has been proposed for many years. The vulnerable index was derived in the original SPM to evaluate the vulnerability of a cutest in power system. But the stability evaluation has to be based on calculation of all outset indexes, it is time consuming for a real power system. The notion of Critical Cutset Group (CCG),is defined in this paper,and corresponding CCG finding algorithm is proposed. It is demonstrated that the nontion of CCG is reasonable and the algorithm is highly efficient.更多还原