of current, voltage and magnetic flux. This decoupled control of
torque and flux component is based on the d-q synchronous
reference frame [70,105]. The vector control system ensures
independent control on DC link voltage, wide range operation
and optimal speed tracking to attain maximum energy [106]. The
various vector control techniques adapted for several applications
[85,107–117] are manifestly tabulated in Table 3. The vector
control is used to maintain the stator frequency constant under
variable speed operation. The active and reactive power is controlled
individually by various vector control techniques presented
in [118–128] and are tabularized in Table 4. During grid fault, the
non-linear control algorithm with direct decoupling helps to
improve the ride through a turbine [129]. Also, the steady state
and dynamic response of electric machines could be improved by