Electricity Asset Management Plan 2019-2029
160
Vector Limited://
Option 4: Non-network options. Growth in this area is predominantly commercial where a single customer’s supply requirements may offset the capacity delivered by a non-network solution such as a network battery solution. Similarly for demand side management (DSM) solutions such as hot-water load control Option 1: Distribution feeder upgrades: Reinforce the 11kV distribution network at Ascot, Robertson and Oruarangi Rds, and Mangere Bridge
Rejected
Forecast capacity shortfall on the distribution network at Mangere
$4.5M Selected
FORECAST INVESTMENT SUMMARY ($MILLION NOMINAL)
DESCRIPTION
FY20
FY21
FY22
FY23
FY24
FY25
FY26
FY27
FY28
FY29 TOTAL
Install a third transformer in Mangere Central zone substation Establish Mangere South zone substation 11kV feeder reinforcement – Mangere Central (Mangere Bridge) 11kV feeder reinforcement – Mangere East (Robertson Rd) 11kV feeder reinforcement – Mangere West (Oruarangi Rd)
1.16
1.16
1.00
7.95
7.95
16.90
1.76
1.76
2.62
2.62
0.16
0.16
Total CAPEX
1.32
0.00
0.00
1.76
2.62
1.00
7.95
7.95
0.00
0.00
22.60
NEEDS STATEMENT – WIRI Wiri covers the established areas of Manukau, west to commercial area of Wiri and south to the residential area of Clendon. Growth is being driven by the greenfields commercial developments to the west of Roscommon Rd. Wiri zone substation is nearing capacity, initiating construction of Wiri West substation in Jerry Green St (Wiri West - new zone substation).
A new 11kV feeder is proposed from Manukau substation
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.
DESCRIPTION
DISCUSSION OF OPTION
ESTIMATED COST (NPV IF APPLICABLE)
STATUS
Forecast security shortfall arising at Wiri substation
Option 1: Construct a new substation at Wiri West. This solution will provide additional capacity for greenfields commercial growth along Roscommon Rd while providing additional security to Wiri substation. Option 2: Non-network solutions. This is a commercial area making currently available non-network solutions impractical Option 3: 11kV feeder reinforcement – Great South Rd. A feeder reinforcement to address forecast capacity constraints
$11.6M Selected
Rejected
Forecast capacity shortfall on the distribution network at Manukau
$1.8M Selected
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