This Regulatory Investment Test for Distribution (RIT-D) arises because there is insufficient thermal capacity at Sunbury Zone Substation to supply the forecast load. In addition, the reliability, age and condition of the Sunbury Zone Substation assets is exposing customers to an increased loss of supply risk.

Draft project assessment report

This document is Jemena’s draft project assessment report for the Sunbury Zone Substation. In accordance with the requirements of the National Electricity Rules this report describes:

• the identified need in relation to the Sunbury network;
• submissions on the non-network options report;
• the credible options assessed that may address the identified need;
• the methodologies used to quantify market benefits;
• the net present value assessment results for the potential credible options assessed; and
• the technical characteristics of the proposed preferred credible option.

This report includes the following economic assessment spreadsheet attachments:

• SBY RIT-D options analysis - Low demand growth rate scenario
• SBY RIT-D options analysis - Medium (base) demand growth rate scenario
• SBY RIT-D options analysis - High demand growth rate scenario

All submissions and enquires relating to this draft project assessment report must be lodged with us on or before 10 March 2017.

Non-network options report

This document is Jemena’s non-network options report for the Sunbury – Diggers Rest Growth Corridor, and is an initial step in our engagement with non-network proponents in addressing the identified need in relation to the Sunbury Zone Substation. Jemena welcomes an open dialogue with non-network proponents to ensure that the best solution is adopted, whether that solution is a network, non-network or combined project. In accordance with the requirements of the National Electricity Rules this report describes:

• the identified need in relation to the Sunbury network;
• the potential credible network options that may address this need; and
• the technical characteristics of a credible non-network option.

All submissions and enquiries relating to this non-network options report must be lodged on or before 29 January 2016.