Oireachtas Joint and Select Committees

Tuesday, 16 June 2015

Joint Oireachtas Committee on Transport and Communications

North-South Interconnector: Discussion

12:00 pm

Mr. Garrett Blaney:

My understanding is that the carrying capacity is about 600 MW for the second North-South interconnector. It may be slightly greater in AC than DC, but it is not that much greater. A Deputy spoke earlier about one-way flow. The important point is that this is not a one-way flow. This is a two-way flow, and the flows work depending on what is most efficient for consumers across the island. Sometimes it will flow north; sometimes it will flow south. It depends on the generators that are available, but it is always there to schedule the lowest cost for the consumer. It is very much a two-way flow, and the two-way flow means that consumers on all parts of the island can benefit from the interconnector.

This has been sized after detailed planning studies. They have looked at the various flows across the island. They have done extensive scenarios, and this was the most efficient size identified as part of that planning process. I am confident that it is not too small or too large but that it is the efficient size that comes out of the standard planning calculation.

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