Newton-like method for line outage simulation

K.L. Lo, Z. Meng

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


Line outage simulation is a necessary part of contingency analysis. The Newton-based full AC load flow method is commonly used for this purpose despite its time consuming computational process. A compensation scheme and a partial refactorisation method is proposed for the efficient solution of the first iteration of the post-contingency full AC load flow. Two Newton-like load-flow methods, the Fixed Newton method and the modification of the right-handside vector method, are also described to continue the calculation until convergence is obtained. These methods eliminate the need for complete refactorisation of the jacobian matrix. The two methods are compared with the Newton-based full AC load flow method and the fast decoupled load flow in three test systems to demonstrate their convergence characteristics.
Original languageEnglish
Pages (from-to)225-231
Number of pages6
JournalIEE Proceedings Generation Transmission and Distribution
Issue number2
Publication statusPublished - 2004


  • jacobian matrices
  • newton method
  • numerical methods
  • load flow
  • power system security
  • power system simulation


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