The currently prevailing methods for transient stability analysis are summarized and the high time consumption of iterated solving of network equations is pointed out.The characteristics of the network equation calculation during tran-sient stability analysis are analyzed,and the use of factorization modified algorithm and partial re-factorization algorithm as well as the introduction of sparse technology are proposed to reduce the computation of network equation.Case simula-tion results indicate that the factorization modified algorithm has satisfactory adaptability,numerical precision and numeri-cal stability.
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