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TransGrid PSCR Maintaining compliance Broken Hill substation secondary systems

14/12/2019
Market Network Service Provider
StageProject Specification Consultation Report
ConvenorAEMO NSP
Initiated14/12/2019
Accepting submissions?Yes
Submissions close16/03/2020

TransGrid has recently published a Project Specification Consultation Report (PSCR) for maintaining compliance with performance standards applicable to Broken Hill substation secondary systems. 

Broken Hill substation was commissioned in 1979 and forms part of TransGrid’s network that serves South Western NSW. The substation is a customer connection point for nearby generators owned by AGL and Essential Energy. It also supports the flow of electricity to a residential population of more than 17,000 in Broken Hill and surrounding areas via the Essential Energy networks. Broken Hill substation forms part of the wider South Western NSW network which supports renewable energy zone development and will continue to play a central role in supporting the flow of energy to the Far West region of NSW.

TransGrid has identified that the secondary systems at Broken Hill substation have reached a condition that reflects the end of serviceable life. As it is superseded by new technology at the manufacturer level and the existing technology becomes obsolete, spare parts become scarce and the ability of any primary asset connected to the substation to reliably operate will be at risk.

TransGrid considered four credible options that would meet the identified need from a technical, commercial, and project delivery perspective. A complete upgrade and renewal of secondary systems at the Broken Hill substation by using modular Secondary Systems Buildings (SSBs), new metal-clad 22kV switchgear, and installing new cable throughout, is the most efficient technically and commercially feasible option at this draft stage of the RIT-T process. This option addresses the identified need and identified primary plant renewals under asset renewal programs, offers the most benefit to consumers and can be implemented in sufficient time to meet the identified need by 2022/23. It is therefore the preferred option presented in this PSCR.

The estimated capital cost of the proposed preferred option is approximately $13 million ± 25%. TransGrid is the proponent of the proposed network project.

TransGrid welcomes written submissions on materials contained in this PSCR. Submissions are particularly sought on the credible options presented and from potential proponents of non-network options that could meet the technical requirements set out in this PSCR. Submissions are due on 16 March 2020.

In accordance with the requirements of the National Electricity Rules, a summary of the PSCR is made available on the AEMO website. A copy of the PSCR can be obtained from TransGrid’s website on the Regulatory Investment Tests page  or by emailing RIT-TConsultations@TransGrid.com.au.

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