Electricity Asset Management Plan 2019-2029
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The graph below taken from the CBARM model for this asset shows a view of asset health at the end of the AMP 10 year period if an intervention programme is undertaken. Graphs of the current health and health at 10 years if replacement is not undertaken are included in Section 4.
Figure 5-4 Asset health at year 10 with Intervention – Ground Mount Distribution Switchgear
TARGETED OUTCOMES
CUSTOMER EXPERIENCE
SAFETY
RELIABILITY
RESILIENCE
OPERATIONAL EFFICIENCY
CYBER SECURITY AND PRIVACY
OPTIONS CONSIDERED Options to address the need identified above have been assessed and are summarised in the following table.
DESCRIPTION
DISCUSSION OF OPTION
ESTIMATED COST (NPV IF APPLICABLE)
STATUS
Option 1: Do nothing
There is a high risk that a bathtub curve scenario could eventuate where a sudden increase in deterioration / asset failures are likely and may encompass a greater number of assets that can be attended to under the budgeted corrective maintenance programme. This will have a negative impact on SAIDI and Asset Safety Incident rate service level. A ‘Do nothing’ approach is rejected The preference would be to replace all RMUs with a health index of 6 and above in the AMP period but such a programme will lead to an estimated capital spend of $213.94M over the AMP period which is not tenable within the DPP constraint. This selected programme of works will see at least those units with a health index of 8 and above replaced within the 10 year AMP period. This calculates to ~ 1500 units replaced or refurbished.
Rejected
Option 2: Undertake a staged and scheduled programme of works to replace or refurbish distribution oil switchgear prioritised by condition and criticality
$114.60M Selected
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