Current control of unbalanced electrical systems

Cursino Brandão Jacobina, Maurício Beltrão De Rossiter Corrêa, Talvanes Meneses Oliveira, Antonio Marcus Nogueira Lima, Edison Roberto Cabral Da Silva

Research output: Contribution to journalArticlepeer-review

150 Scopus citations


The vector modeling approach is employed to describe the behavior of unbalanced three-phase (three-wire), unbalanced two-phase and single-phase systems. In the case of single-phase systems, a fictitious circuit is introduced in order to create the vector model. Continuous-time and discrete-time current controllers based on the vector approach are presented. The current control scheme is based on two controllers, one for the positive sequence and another for the negative sequence. The controllers are implemented in the synchronous reference frame and in the stationary reference frame. In the stationary reference frame, the use of the same integral gains for both controllers simplifies the equations of the control law, especially for single-phase systems. Simulation and experimental results obtained with a pulsewidth modulation voltage-source inverter supplying unbalanced systems are presented.

Original languageEnglish
Pages (from-to)517-525
Number of pages9
JournalIEEE Transactions on Industrial Electronics
Issue number3
StatePublished - Jun 2001
Externally publishedYes


  • Current control
  • Unbalanced systems


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