Electricity Asset Management Plan 2019-2029
162
Vector Limited://
Option 3: Install temporary generation on an as-needed basis. The generation connection points at the zone substation will be retained but because of the cost, this option will be considered as a backup to other options Option 1: 11kV distribution feeder upgrades at Maraetai, Papakura and Waiheke Island to accommodate localised growth
Rejected
Forecast capacity shortfall on the distribution network at Maraetai, Papakura, and Waiheke
$4.9M Selected
FORECAST INVESTMENT SUMMARY ($MILLION NOMINAL)
DESCRIPTION
FY20
FY21
FY22
FY23
FY24
FY25
FY26
FY27
FY28
FY29 TOTAL
Waiheke Island – improve resilience of subtransmission circuits 11kV feeder reinforcement – Maraetai 11kV feeder reinforcement – Papakura 11kV feeder reinforcement – Waiheke
1.00
3.25
3.25
7.50
2.62
2.62
0.16
0.16
2.11
2.11
Total CAPEX
0.16
0.00
1.00
5.36
5.87
0.00
0.00
0.00
0.00
0.00
12.39
NEEDS STATEMENT – LV NETWORK REINFORCEMENTS Increasing demand whether due to incremental increases in load by existing customers or through infill in existing subdivisions sometimes initiates reinforcement of the LV network. Most of these projects are small in nature and consequently identified less than one year in advance. Planning, design and delivery is generally reactive and in most cases will consist of traditional network reinforcement. The budget for future years is estimated from historic trends and load forecasts.
TARGETED OUTCOMES
CUSTOMER EXPERIENCE
SAFETY
RELIABILITY
RESILIENCE
OPERATIONAL EFFICIENCY
CYBER SECURITY AND PRIVACY
OPTIONS CONSIDERED Options are summarised below.
DESCRIPTION
DISCUSSION OF OPTION
ESTIMATED COST (NPV IF APPLICABLE)
STATUS
Address LV capacity shortfalls Option 1: Do Nothing. Increasing demand on established network either results in overloaded assets or voltage issues if not addressed. ‘Do nothing’ approach is not practical
Rejected
Option 2: To maintain the operational functionality of the LV network investment is required to address impending voltage and loading issues on the LV network. The budget for future years is based on historic trends – an average of $1M is forecast for each network ($2M pa) for the 10 year AMP period
$20.0M Selected
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