Fault find a pitch system and complete a six monthly turbine service

You are a Wind Turbine Technician on the Ridgeback crew.

Simulated workplaceIntermediate missionCAQA Powergen Station

What is going on

WTG-05 has faulted three times this week on pitch fault code 412 on blade B and is sitting in pause. Work order WO-26-5131 asks for a check of the hydraulic pressure, the proximity sensor and the accumulator. The turbine is also due for its six monthly service, and Ben Carrington wants both done in one visit to save a climb. A weather front is due on Friday with wind speeds above the working limit. The control room must record the turbine out of service and the permit must show the rotor lock and the 33 kilovolt isolation. Two technicians are required in the nacelle.

Ben Carrington, Renewables Manager
Subject: WTG-05 pitch fault and the six monthly services

WTG-05 has faulted three times on pitch this week and is sitting in pause, and we still have four six monthly services to complete this month. Please plan a visit to WTG-05 under WO-26-5131 following the routine maintenance procedure, isolate it properly, fault find the pitch system, and while you are up there complete the six monthly task list. Record the climatic conditions and the brake and oil readings in the log and the work order. Watch the forecast, we have a front due Friday.

Your brief

Plan the visit to the routine maintenance procedure, isolate the turbine under permit, fault find the pitch system, complete the six monthly task list, return the turbine to automatic operation and record the readings and results in the work order and the Operations Log.

Work through it

You do not need to do it all. Doing a few of these will show you what the work is like. Your ticks and notes stay on this device.

Read the Procedure: Routine Wind Turbine Maintenance and prepare a visit plan for WTG-05 covering weather limits, the task list, parts and the control room notification.
Update permit PTW-26-1193 in the Permit and Isolation Register with the stop, rotor lock and 33 kilovolt isolation, the proving result and the status Issued.
Describe the pitch system fault finding sequence for blade B, covering hydraulic pressure, accumulator precharge, proximity sensor and the fault log in the turbine controller.
Record the six monthly service results on WO-26-5131 in Maintenance Work Orders and Defects: bolt torque checks, gearbox oil level and sample, brake pad wear and sensor checks.
Enter the climatic conditions during the visit and the turbine return to automatic in the Operations Log.
Describe the return to service steps, including the self test, the control room release and watching the first start from the base.
Raise a separate work order for any defect you found that was outside the visit scope, with a priority.

My notes: what did I enjoy, and what surprised me?

What someone in this role would produce

Visit plan
Permit record with isolations
Work order with service results and fault finding
Operations Log entries

Printing this is a record of what you explored. It is not a certificate or a qualification.