A new method of virtual flux (VF) based instantaneous power estimation without line voltage
sensors is proposed. The new solution is employed in the direct power control (DPC) of
three-phase PWM rectifiers. Theoretical principles, steady-state operation and dynamic
performance of the DPC with VF-based power estimation are presented and compared with
the conventional voltage-based estimation. Both power estimators are investigated under
purely sinusoidal as well as unbalanced and distorted line voltages. Computer simulations …

In this paper, a robust virtual-flux (VF) based predictive direct power control (PDPC)(VF-
PDPC) of a three-phase pulse-width modulation (PWM) rectifier is introduced. A simple
neural filter based integrator (NF-I) is used for VF estimation. The NF-I leads to remove
harmonic distortions and dc offset in the estimated VF components. The estimated VF
components are used for robust sensorless VF-PDPC with a constant switching frequency.
Numerical simulations are carried out for testing the proposal. Simulation results proved …