Real time estimation of DFIG inductances and rotor currents

In this paper, we develop a procedure in order to identify online the stator and rotor DFIG inductances. It is worth noticing that only the stator currents and voltages sensors are required. So, the rotor currents are reconstituted via the identified DFIG inductances. As, the identification procedure depends on the stator and rotor flux so, this latter is derived through a proposed sliding mode observer related to stator currents. The feasibility of our method is evaluated by simulation, in the case of stator power control involved with a DFIG rating at 1.5 MW.