tripping scheme Interconnector to include the during outages transformers at of the Lismore Lismore 330kV transformers, Directlink substation, 872B 872B bay at Tripping Scheme bay at Armidale Armidale or and 872A, 872B 872A, 872B and and 892A bays at 892A bays at Coffs Harbour. Coffs Harbour Reduced Install likelihood of loss disconnector at of supply to Protection Yass substation Queanbeyan for Changes - 976 and change a second Line 8 protection contingency. 110 0 110 Configuration & settings at This includes a Protection Canberra, Yass reduction in Changes and recall times for Queanbeyan. 976/1 and 976/2 Lines. Replace interplant Terminal connections and Full use of Equipment change current contingent Upgrades - 94E transformer 9 capacity of 373 50 0 50 Mt Piper 132 secondary ratios – MVA for 94E Wallerawang on the 94E Line Line. 132 Switchbays switchbay at Wallerawang 132. Improved rating information on real time Install dynamic ambient Dynamic Line line ratings temperature and Ratings & on real time wind speed for Transmission ambient these lines, 10 1,000 0 1,000 Line Uprating - temperatures and which will allow Northern 132kV wind speeds on increased line System 967, 96R, 96T ratings of and 966 Lines. approximately 20% at times of favourable conditions.
Directlink Tripping Scheme tripping scheme to include the transformers at Lismore 330kV substation, 872B bay at Armidale and 872A, 872B and 892A bays at Coffs Harbour. Interconnector during outages of the Lismore transformers, 872B bay at Armidale or 872A, 872B and 892A bays at Coffs Harbour 8 Protection Changes - 976 Line Configuration & Protection Changes Install disconnector at Yass substation and change protection settings at Canberra, Yass and Queanbeyan. Reduced likelihood of loss of supply to Queanbeyan for a second contingency. This includes a reduction in recall times for 976/1 and 976/2 Lines. 110 0 110 9 Terminal Equipment Upgrades - 94E Mt Piper 132 – Wallerawang 132 Switchbays Replace interplant connections and change current transformer secondary ratios on the 94E Line switchbay at Wallerawang 132. Full use of contingent capacity of 373 MVA for 94E Line. 50 0 50 10 Dynamic Line Ratings & Transmission Line Uprating - Northern 132kV System Install dynamic line ratings on real time ambient temperatures and wind speeds on 967, 96R, 96T and 966 Lines. Improved rating information on real time ambient temperature and wind speed for these lines, which will allow increased line ratings of approximately 20% at times of favourable conditions. 1,000 0 1,000
AER%20-%20Final%20Decision%20%28Substituted%29%20TransGrid%20transmission%20determination%202015-18%20-%20July%202015.docx