Electricity Asset Management Plan 2019-2029
168
Vector Limited://
TARGETED OUTCOMES
CUSTOMER EXPERIENCE
SAFETY
RELIABILITY
RESILIENCE
OPERATIONAL EFFICIENCY
CYBER SECURITY AND PRIVACY
OPTIONS CONSIDERED Options are summarised below.
DESCRIPTION
OPTIONS
ESTIMATED COST (NPV IF APPLICABLE)
STATUS
Improve network resilience and reduce outage times for customers
Option 1: Install remotely operated switchgear. This is a continuation of an existing programme to improve and expand our ability to remotely operate distribution switchgear across the network. This programme will reduce feeder switching times to isolate faulty section and/or to restore healthy sections after a fault. It will result in reduced SAIDI and improved service levels for customers Option 2: Increasing the number of isolations points on the network. The targeted installation of additional isolation points on the network allows us to reduce the number of customers between isolation points. In the event of a fault the number of customers without power while the fault is repaired is reduced. This also reduces SAIDI Option 3: Increase feeder backstopping capability. Extending distribution feeders to enable connection into other feeders provides backstopping capability and reduces the number and duration of customers without power when a fault occurs
$28.0M Selected
$14.75M Selected
$17.5M Selected
FORECAST INVESTMENT SUMMARY ($MILLION NOMINAL)
DESCRIPTION
FY20
FY21
FY22
FY23
FY24
FY25
FY26
FY27
FY28
FY29 TOTAL
11 kV feeder remote control – Auckland network 11 kV feeder remote control – Northern network 11 kV feeder isolation points – Auckland network 11 kV feeder isolation points – Northern network 11kV feeder meshing – Northern network
1.50
1.50
1.00
1.00
1.00
1.00
1.00
1.00
1.00
1.00
11.00
2.50
2.00
2.00
1.50
1.50
1.50
1.50
1.50
1.50
1.50
17.00
0.25
0.50
0.80
0.80
0.80
0.80
0.80
0.80
0.80
0.80
7.15
0.40
0.80
0.80
0.80
0.80
0.80
0.80
0.80
0.80
0.80
7.60
2.50
2.50
2.50
2.50
2.50
2.50
2.50
17.50
Total CAPEX
4.65
4.80
4.60
6.60
6.60
6.60
6.60
6.60
6.60
6.60
60.25
5.1.1 ZONE SUBSTATION AND DISTRIBUTION FEEDER PROGRAMMES
ZONE SUBSTATION FIRE AND SECURITY IMPROVEMENTS
NEEDS STATEMENT Within the framework of the safety precautions applied to electricity zone substation, fire protection is one of the essential features. While fires in zone substations are rare the consequences of a substation fire can be very serious. The objectives of fire protection in our zone substations are clearly defined in Vector guideline “ENG-0028, Fire protection in zone substations”. A number of our fire and security systems are now reaching end of life and do not comply with Vector’s latest design standards, is unsupported technically by vendors, placing the safety of zone substations and their equipment at risk. As part of our programme of continuous improvement we are installing card-access security and improving fire
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