Electricity Asset Management Plan 2019-2029
195
Vector Limited://
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
Taking a do-nothing approach means that Vector will not be able to prioritise and plan its works programme to control vegetation. This option will also result in continued risk to the public presented by low lines and risk continued and increasing outages due to vegetation. This will in turn result in continued and increasing SAIDI and SAIFI indices and impact negatively on service levels and the customer’s experience A ground based survey to measure overhead line clearances will be time consuming and expensive. A staged LiDAR survey will provide information with regard to network clearances in a quick and effective manner for large tracts of the network in short period of times. This data will inform Vector’s proactive programmes of work to refurbish OH assets as well as further inform our maintenance programme. This will in turn improve our SAIDI and SAIFI caused by ‘switching for low lines’.
Rejected
Option 2: Undertake ground based survey of overhead lines and measurement of clearances Option 3: Undertake a staged and scheduled LiDAR programme to measure clearances
Rejected
$6.60M Selected
PROPOSED INVESTMENT SUMMARY ($MILLION NOMINAL)
DESCRIPTION
FY20
FY21
FY22
FY23
FY24
FY25
FY26
FY27
FY28
FY29 TOTAL
Auckland overhead network LiDAR survey Northern overhead network LiDAR survey
0.30
1.00
1.00
1.00
3.30
0.30
1.00
1.00
1.00
3.30
Total CAPEX
0.60
0.00
0.00
2.00
0.00
0.00
2.00
0.00
0.00
2.00
6.60
RIGHT OF WAY POLES
NEEDS STATEMENT In mid-2014, an increasing rate of deterioration and failure of non-Vector owned assets deployed along Rights of Way within the Auckland region was identified. Poles and conductors make up the majority of these assets and can cause significant damage and harm to people and property when they fail. Vector has experienced an increase in costs and customer outages as a result of these customer assets being in poor condition. Customers often do not realise they are responsible for these assets or call Vector for advice. This incurs an increase in operational costs including the costs of sending a reactive crew to confirm the state of the asset and whether it is part of our network. Additionally, when Vector is made aware of an immediate safety issue, our safety procedures require us to immediately de-energise the area remotely until we can physically attend and assess whether the asset is safe. This is done at the HV level as there is currently no way to remotely de-energise the LV network. This results in increased outages to customers, negatively impacts quality measures such as SAIDI and SAIFI and incurs costs to manage and inform customers who are affected by the resulting safety outage.
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