Assessment of a PLL‐ASMO position/speed estimator for sensor‐less control of rotor‐tied DFIG (RDFIG)

In this paper, an adaptive sliding mode observer (ASMO) associated with a phase locked loop (PLL) is assessed for the sensor-less control of rotor-tied doubly-fed induction generator (RDFIG). proposed PLL-ASMO estimator, ASMO utilizes stator current, voltage, and back electromotive force (EMF) as state variables. The used in order to estimate back-EMF from which slip position/speed extracted using PLL. design gains based on Lyapunov stability criteria ensure convergence finite time. Therefore, main contribution paper propose PLL-based estimator that aims improve estimation by reducing chattering effect. A comparative study between standard PLL-SMO presented. Also, For first time, RDFIG. performance strategy validated through simulation experimental measurements under various operating conditions. Furthermore, shown be robust machine parameter variation.