Ravenswood Progess

The Ravenswood project is continuing to progress.  There have been a few delays, as usual, but I am optimistic that we should be fully commissioned by around December 15.

The main delay has been the arrival of the large crane to do the final lifts.  It was somewhat delayed at the 76 MW Ripley project, mainly due to high winds.  But it arrived a the site today, and should be ready to lift by tomorrow.

The 6 turbines have two bottom sections in place.  The large crane will lift the next two tower sections, the nacelle, and the rotor.  In perfect weather (ie. low winds), it takes about 2.5 days per turbine.

Once the turbine has been erected, there are several days of internal work required.  This includes stretching the bolts, installing the cables and capacitor banks, testing the systems, followed by a complete walk down of the structure with the manufacturer (Vestas), and commissioning.  I am hoping we can go with a progressive commissioning, so that each turbine can be operating as it is completed.

The buried electrical grid is almost complete.  We still have 2 poles to connect at the point of interconnection, to hold the disconnect, and the meter.  The pad mount transformed arrived Monday, and are in the process of being connected.  We need to have Hydro One and the Electrical Safety Authority sign off on the interconnection before we can energize.  I am hoping the wind farm grid can be energized late this month.  After that, we can turn on turbines as they are completed.

The protection and control system, which has a transfer trip scheme required by Hydro One, is well underway.  The building that houses the computer is installed, and should get station power next week.  The internet connection to the SCADA system is being installed this week, and the digital leased lines for the transfer trip are due to be installed next Friday.  Once the transfer trip system is tested and approved by Hydro One, and the grid is energized, we can turn the turbines on as they are done.

Major risk factors remaining include delays in Hydro One connection, or high winds, which prevent the use of the large crane.  Wind developers usually like high winds.

I am hoping for unusually calm weather on southern Lake Huron for a few weeks.

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