Servizi

Diagnostic

Attività diagnostiche

In the following are listed some of the diagnostic activities that can be provided by WINDFOR or its sub-contractors, useful to assess the aging or wear and tear and the Wind Farms and relevant Balance of Plant.

Electrical Tests on Medium Voltage Cables and MV/HV Stations

These tests can be performed on all MV cable network. In general terms it is expected to perform a service which consists of:

  • Assessment of the electrical length of the routes of underground cables with reflect-metric method.
  • Identification of the position of the joints present along the routes.
  • Measurement of tan δ (tangendelta) by the voltage applied to values ​​of 0.1 Hz to 0.5 Uo, Uo and 1.5 Uo.
  • Location of any defects with the method of partial discharge.
  • Information about any operational consolidation efforts to be put in place.

At the MV/HV Stations, and in particular on the MV/HV Transformer, it will be provided the following services:

  • Measurement of the insulation resistance of the MV and HV windings.
  • Relief of polarization index (PI) of the MV and HV windings;
  • Measurements of the electric resistance of the MV and HV windings (at least six positions of the under-load switch) .
  • Measurement of the transformation ratio and vector group.
  • Measurement of the leakage inductance of the windings.
  • Measurement of SFRA (Sweep Frequency Response Analysis) and comparison with the results of previous analysis, if available.
  • Measurement of dissolved gases in oil with photo acoustic method.

Tests on the Electrical generators of the WTGs

In general terms it is expected to perform a service which consists of:

  • Measurement of the insulation resistance of the stator windings and rotor windings, if any.
  • Relief of the polarization index (PI) of the stator windings and rotor windings, if any.
  • Measurement of the electric resistance of the stator windings and rotor windings.
  • Visual inspection of the rings /brushes system.

Gearboxes Inspections

In general terms it is expected to perform a service which consists of:

  • Vibration Analysis (verification of noise).
  • Analysis of the metal particles content in the oil of the gearbox.
  • Endoscopic examination of the conditions of the teeth of the stages.

Blade Inspections

In general terms it is expected to perform a service which consists of:

  • External visual inspection of all blades (by rope access).
  • Inspection of the internal structure of all the blades by endoscopic system.
  • Measurement of  the electric resistance of the lightning protection system of the blades.
  • Measurement of ground resistance of the wind turbines.

Civil Works inspections

The inspection will cover the civil works of the whole wind farm. In particular, it is expected to perform a service which consists of:

  • Roads and platforms, drains and tunnels, eventual supporting structures.
  • Foundations of the WTGs (non-destructive tests on concrete by carbonation and verification of cover irons; examination of cracks on the visible parts).
  • Anchors (visual inspections).
  • Metal structures (welding, painting and other protection works).