Current control of unbalanced electrical systems
Jacobina, C.B.; Correa, M.B.deR.; Oliveiro, T.M.; Lima, A.M.N.; da Silva, E.R.C.
Industrial Electronics, IEEE Transactions on
Volume 48, Issue 3, Jun 2001 Page(s):517 - 525
Digital Object Identifier 10.1109/41.925578
Summary: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
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