Electricity Asset Management Plan 2019-2029
151
Vector Limited://
Option 3: Non-network options. The load is too large to benefit from sensible battery solutions or load control Option 1: 11kV feeder upgrade. A shortfall in backstop capacity for Northcote ZSS and for several Hillcrest feeders, due in part to the Housing New Zealand development, will be alleviated by 11kV reinforcement. Option 2: DSM options. Hot water load control for Hillcrest and Northcote is under investigation
Rejected
Improve distribution network security between Hillcrest and Northcote ZSS
$2.0M Selected
Under analysis
FORECAST INVESTMENT SUMMARY
DESCRIPTION
FY20
FY21
FY22
FY23
FY24
FY25
FY26
FY27
FY28
FY29 TOTAL
Install a second transformer and subtransmission cable at Highbury zone substation Install a second transformer and subtransmission cable at Takapuna zone substation Ngataringa Bay Zone Substation - flood mitigation
2.45
2.00
4.45
3.00
3.00
1.30
7.30
0.50
4.50
4.50
9.50
11kV feeder upgrade – Northcote/Hillcrest
2.00
2.00
Total CAPEX
3.00
3.50
5.80
6.50
0.00
2.45
2.00
0.00
0.00
0.00
23.25
NEEDS STATEMENT – HENDERSON The Henderson area is one of the major growth areas in the Auckland region with major residential greenfields developments at Hobsonville Point extending towards Whenuapai, Riverhead, and Kumeu to the north and Westgate and Red Hills to the west. A project to install load control (Riverhead - implement load control) in the Riverhead area will forestall the need for a transformer upgrade at Riverhead zone substation until the latter part on next decade (Riverhead - 33/11kV transformer capacity upgrade). An 11kV feeder upgrade is forecast for Kumeu (Kumeu - 11kV feeder upgrade). A new zone substation (Redhills - new zone substation) is proposed west of Westgate substation to support the green- fields residential growth. This substation is expected to be supplied via subtransmission circuits from Westgate. Ducts are being installed along SH16 motorway corridor (Westgate - future-proofing ducts (Henderson- Westgate (NZTA)) in conjunction with NZTA’s motorway widening project. Subtransmission cables will be installed when the security of supply to Westgate substation is compromised. A new substation at Hobsonville Point (Hobsonville Point - new zone substation) currently under construction, is scheduled to be completed in 2019. To support this substation two 11kV feeder projects are proposed. These are the installation of ducts along SH18 and the installation of another 11kV feeder connection to Greenhithe across the Greenhithe Bridge.
The transformers are to be upgraded at Te Atatu zone substation (Te Atatu - 33/11kV transformer capacity upgrade) to provide additional capacity, and an upgrade of the 11kV feeder into Lincoln Rd.
TARGETED OUTCOMES
CUSTOMER EXPERIENCE
SAFETY
RELIABILITY
RESILIENCE
OPERATIONAL EFFICIENCY
CYBER SECURITY AND PRIVACY
OPTIONS ASSESSMENT For major projects, i.e. above $4M (level to be confirmed), include the following in this section: Technical feasibility, economic analysis, OPEX and CAPEX costs, net present value or net present cost, service levels, risks, etc.
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