Super-Positioning of Voltage Sources for Fast Assessment of Wide-Area Thévenin Equivalents

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Abstract

A method for superimposing voltage sources is sought optimized by using a sparse triangular solver and multiprocessing. A revision to the method is suggested which
exploits Schur’s complement of the network admittance matrix and optimal re-use of computations. The algorithm is implemented and parallelized for shared memory multiprocessing. The proposed algorithm is tested on a collection of large test systems and performance is found to be significantly better than the reference method. The algorithm will thereby facilitate a speed-up of methods relying on Thévenin equivalent representation such as the Thévenin equivalent method for contingency assessment.
Original languageEnglish
JournalI E E E Transactions on Smart Grid
Volume8
Issue number3
Pages (from-to)1488-1493
ISSN1949-3053
DOIs
Publication statusPublished - 2017

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Keywords

  • Algorithms
  • Power system analysis computing
  • Thévenin equivalent

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