Reactive power redispatch for loss reduction using a modified power flow jacobian

A.C. Zambroni de Souza, R. Leme, Kwok Lo, J.C. Stacchini de Souza, A.B. Almeida

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


This study addresses the problem of reactive power redispatch under bilateral power transactions. The proposed approach is to reduce active loss in a critical area, under the voltage collapse point of view, which is identified by the tangent vector technique. A methodology that uses an augmented load flow Jacobian is proposed to redispatch the reactive power and can be easily implemented in ordinary power flow programmes. Tests with the IEEE 14-bus test system and with a real Brazilian-107 bus system are carried out to illustrate the proposed approach. Results obtained by solving an optimal power flow problem are also presented for validation purposes.
Original languageEnglish
Pages (from-to)657-664
Number of pages8
JournalIET Generation, Transmission and Distribution
Issue number7
Publication statusPublished - Jul 2012


  • reactive power redispatch
  • loss reduction
  • modified power flow


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