ACT supply security project

Act supply security project Bulk power supply to the ACT comes via TransGrid’s 330 kV network to Canberra Substation. Williamsdale Substation is connected at 330 kV to Canberra Substation via a single line. ActewAGL’s 132 kV network is supplied from Canberra and Williamsdale Substations. Total loss of Canberra Substation would also disconnect 330 kV line to Williamsdale and effectively blackout whole ACT. Stockdill Substation will be connected to the 330 kV network bypassing Canberra Substation. If future total failure of Canberra Substation, supply will be maintained to ActewAGL’s 132 kV via Stockdill and Williamsdale Substations.

Existing 330 kV and 132 kV network Yass Kangaroo Valley 132 kV Lower Tumut Canberra Gold Creek Upper Tumut Latham Woden Rest of ActewAGL 132 kV network Gilmore Theodore Williamsdale

Total failure of Canberra Substation 330 kV Yass Kangaroo Valley 132 kV Lower Tumut Canberra Gold Creek Upper Tumut Latham Woden Rest of ActewAGL 132 kV network Gilmore Theodore Williamsdale

Proposed Stockdill Substation 330 kV Yass Kangaroo Valley 132 kV Lower Tumut Canberra Gold Creek Upper Tumut Latham Stockdill Woden Rest of ActewAGL 132 kV network Gilmore Theodore Williamsdale

Rest of ActewAGL 132 kV network Total failure of Canberra Substation – Supply to ACT maintained through Stockdill and Williamsdale Substations 330 kV Yass Kangaroo Valley 132 kV Lower Tumut Canberra Gold Creek Upper Tumut Latham Stockdill Woden Rest of ActewAGL 132 kV network Gilmore Theodore Williamsdale

Before Macgregor To Upper Tumut Canberra Holt Stockdill Dr LMWQCC Stockdill site 132 kV to Woden 330 kV to Williamsdale

After Macgregor To Upper Tumut Canberra Bypass section Holt Stockdill Dr New 330 kV LMWQCC New 132 kV Stockdill Substation 132 kV to Woden 330 kV to Williamsdale

Public Consultation Process ACT Government (Environment and Planning Directorate) to lead community liaison and engagement activities. As part of the Environment Impact Statement process and Development Application process there will be public notification – scheduled for July 2017.