Transend - Appendix 5 Renewal capital expenditure - Australian ...

This option includes:
� installing new 110 kV GIS;
� new protection and control equipment;
� disposing of existing switchgear and protection and control equipment; and
� demolishing redundant buildings.
The capital cost of this option is $26.62 million ($June 2007).
7.5.2 BENEFITS
This option has the following benefits:
� addresses all of the issues in Section 4;
� requires minimal outages for implementation;
� it reduces the ongoing maintenance requirements and costs associated with the site through:
o a reduction in number of circuit breakers;
o a reduction in the number of disconnectors;
o simplification of protection and control schemes;
o rationalisation of infrastructure (post insulators, gantry structures, bus conductors etc.)
� improves the operational flexibility of the site;
� reduces the overall footprint and visual impact of the site;
� allows for some future expansion of the site; and
� allows for rationalisation of auxiliary equipment.
7.5.3 DRAWBACKS
Drawbacks of this option include:
� future expansion costs may be higher than AIS equivalent.
7.5.4 CONCLUSION
This option is technically viable.
7.6 OPTION 6 - REDEVELOP USING HYBRID SWITCHGEAR
7.6.1 SCOPE
0BInvestment Evaluation Summary
TNM-GS-809-0720
This option includes the replacement, rationalisation and reconfiguration of 110 kV assets at Creek Road Substation
using hybrid switchgear. This option includes redeveloping the site using a double bus arrangement as presented in
option 3.
The scope for is the same as option 3, but includes the use of hybrid switchgear in lieu of AIS.
The capital cost of this option is $26.62 million ($June 2007).
7.6.2 BENEFITS
� This option has similar benefits to option 3.
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