Grid Development

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Northern Ireland Authority For Energy Regulation (NIAER) Letter to Leslie Byrans

Re: Capacity Of Additional North- South Interconnector 9th March 2006 Ref:26341 Letter from Denis Cagney Director Energy Networks to Andrew Cooke

Confidential Additional Electricity Interconnection between Northern Ireland and Republic of Ireland

This report assessed the feasibility of a new 275kV
line between Arva 110kV station and Drumkee 275kV Station.

A suite of technical studies were undertaken jointly by a team of engineers from ESBNG and
NIE over the period April 2001 to July 2004. The presentation of the results from these
studies is provided in this report. The purpose of the technical study work is to quantify the
improvement in transmission capacity and system security that would be provided by each of
the interconnection options.

A joint steering committee comprising of both Northern Ireland Electricity
(NIE) and ESB National Grid (ESB) requested that a feasibility study of
potential 275kV Interconnections be carried out in February 2003. The
inaugral report assessed the feasibility of a potential new 275kV line between
Drumkee 275kV station and Arva 110 kV station.However, following further joint NIE/ESBNG planning studies it was decided
to investigate other further potential routes prior to making a definitive
decision

The Minister for Communications, Marine and Natural Resources, Noel Dempsey T.D., and his Northern Ireland counterpart, Barry Gardiner MP, Minister for Enterprise, Trade and Investment met and reaffirmed their Governments commitment to an all-island energy market.

This paper sets out the policy context for action by the two Governments, regulatory authorities
and industry in creating an All-island Energy Market.

North East 220kV Reinforcement Project Initial Feasibility Study - Final Report No: PE687-R073-001