Encoderless Control of PMa-SynRG Based-Stator Current Vector for Renewable Energy Systems

In this paper, a novel encoderless control of permanent magnet assisted synchronous reluctance generator (PMa-SynRG) based-stator current vector for renewable energy systems is presented using the hardware-in-the-loop (HIL) platform. This platform is employed for emulating the PMa-SynRG. For the encoderless control, the PMa-SynRG rotor position angle along with rotor angular speed are estimated ultimately from the generator's stator currents, as the stator inductance is only requisite nevertheless the stator resistance. Indeed, this encoderless control technique employs one current control loop for regulating the magnitude of the stator current instead of employing two current control loops. For eliminating the current measurement noise, frequency-locked loop (FLL) with a second-order generalized integrator (SOGI) are employed for enhancing the performance of the encoderless control. The proposed encoderless control technique with the SOGI-FLL has a very simple implementation while accomplishing a rapid along with precise estimation performance of the PMa-SynRG rotor position angle and speed.