Electricity Asset Management Plan 2019-2029
158
Vector Limited://
Option 2: Build a second substation within Newmarket remote from the existing substation. The added expense of land purchase significantly increased the cost of this option above that of the preferred option. Option 1: Replace the 22kV switchboard at Penrose GXP. Due to the presence of asbestos, the 22kV switchboard at Penrose GXP had to be replaced. Within ten years the 22kV supply from Penrose will be retired. The proposal is to install a “containerised” switchroom to supply the 22kV circuits until their retirement at which time the switchroom will be uplifted, relocated and used as a replacement for a 33kV switchboard at one of Vectors substations. Option 2: Transpower replace the switchroom/switchboard. Transpower’s practices require the switchroom/switchgear to be installed on the basis of achieving full technical life. This imposes additional unnecessary costs on our customers as these assets will be stranded within a ten year timeframe
$14.6M Rejected
Switchboard replacement at Penrose GXP
$1.0M Selected
N/A Rejected
FORECAST INVESTMENT SUMMARY
DESCRIPTION
FY20
FY21
FY22
FY23
FY24
FY25
FY26
FY27
FY28
FY29 TOTAL
Upgrade Newmarket zone substation
0.16
5.00
2.50
7.66
Install a new 22 kV switchboard at Penrose GXP
1.00
1.00
Total CAPEX
1.00
0.00
0.00
0.16
5.00
2.50
0.00
0.00
0.00
0.00
8.66
NEEDS STATEMENT – PAKURANGA Pakuranga covers established areas of East Tamaki, Pakuranga and Howick and the greenfields growth areas of Flat Bush to the south. The Flat Bush zone substation was established in 2015 in anticipation of the current development. The next stage is to overlay the area with backbone 11kV distribution feeders to enable connection to the various separate developments. Where practicable ducts are being installed along the major arterial routes during the roading construction phase including Link, Chapel and Murphys Roads, followed by cable installation in Ormiston and Chapel Roads.
A new commercial feeder is proposed for Cryers Rd in East Tamaki.
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 capacity shortfall on the distribution network at Flat Bush and East Tamaki
Option 1: Reinforcing 11kV feeders in Flat Bush and East Tamaki. Greenfields residential growth in the Flat Bush area has resulted in the need to reinforce the 11kV distribution network. A number of future-proofing duct and cabling projects in Chapel, Link, Ormiston and Cryers Rd’s address this issue.
$3.5M Selected
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