DFIG Wind Generator Diagnostics

The DFIG (Doubly-Fed Induction Generator) is the dominant topology in the Mexican wind fleet. Its rotor is wound and connects to the grid through slip rings, brushes and a partial converter (~30% of the power). Those slip rings and brushes, along with the rotor insulation, are failure points that don't exist in a conventional generator — which is why DFIG diagnostics are different.

Insulation resistance and polarization index (IEEE 43), partial discharge (IEC 60270), ELCID for the stator core, RSO on the wound rotor, surge/impulse, winding ohmic resistance, slip-ring and brush inspection, thermography and vibration analysis (ISO 10816).

Yes. We run electrical tests and diagnostic maneuvers in the nacelle. If results indicate a major intervention, we coordinate generator removal for in-shop overhaul at our 5,600 m² facility.

Yes. Independent, multi-OEM service: Vestas, Siemens Gamesa, Acciona/Nordex, GE and other DFIG platforms, with Indar/Ingeteam, ABB, Leroy-Somer, Alconza and other generators. We don't service the turbine; we diagnose the generator.

Yes. Predictive diagnostics detect insulation degradation, slip-ring/brush wear and incipient shorts before they cause a ground fault that stops the machine. It's the basis for planning the intervention within the outage window.