Maclaurin-Newton algorithms in 132 kV subtransmission security simulations

S. Jovanovic

Research output: Contribution to journalArticlepeer-review


This paper examines how applicable approximate Jacobian inversions are when implemented in the security analysis simulations of 132 kV power subtransmission. The complete Scottish 400/275/132 kV power transmission network was simulated, including the 132 kV subtransmission network with its high r/x ratios. Both the coupled and decoupled previous termMaclaurin-Newtonnext term load flow algorithms were tested. It was proved that high r/x ratios found in the 132 kV level, five times higher than in 400/275 kV, have an important influence on convergence and accuracy of the inversion Jacobian load flow algorithms. It was found that the decoupled inversion load flow was applicable for 132 kV, it converged regularly, but had worse convergence and accuracy characteristics, compared to 400/275 kV applications, while the coupled inversion load flow was not applicable at all for 132 kV, it always diverged.
Original languageEnglish
Pages (from-to)1084-1088
Number of pages4
JournalElectric Power Systems Research
Issue number12
Publication statusPublished - 2006


  • Jacobian inversion
  • r/x ratio
  • 132 kV
  • subtransmission
  • power systems

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