Electricity Asset Management Plan 2019-2029
187
Vector Limited://
PROPOSED INVESTMENT SUMMARY ($MILLION NOMINAL)
DESCRIPTION
FY20
FY21
FY22
FY23
FY24
FY25
FY26
FY27
FY28
FY29 TOTAL
Parnell 22/11kV TX Replace and TX Refurb
0.08
0.08
Helensville 33/11kV TX replace T1
1.50
1.50
McNab 33/11kV TX Replace T1
0.20
1.08
1.28
Takanini 33/11kV TX Replace T1
0.15
1.31
1.46
Takanini 33/11kV TX Replace T2
1.46
1.46
Triangle 33/11kV TX Replace T1
1.64
1.64
Triangle 33/11kV TX Replace T2
1.64
1.64
Waimauku 33kV TX Replace T1
1.12
1.12
McNab 33/11kV TX Replace T2
1.28
1.28
McNab 33/11kV TX Replace T3
1.28
1.28
Mt Wellington 33/11kV TX Replace T1 Mt Wellington 33/11kV TX Replace T2
1.04
1.04
1.04
1.04
Otara 33/11kV TX Replace T1
1.15
1.15
Otara 33/11kV TX Replace T2
1.15
1.15
Auckland ZSS TX Refurb & Replace Northern ZSS TX Refurb & Replace
0.25
0.25
0.25
0.25
0.75
0.75
1.50
1.50
1.50
1.50
8.50
0.25
0.25
0.25
0.25
0.75
0.75
1.50
1.50
1.50
1.50
8.50
Total CAPEX
2.43
4.04
4.39
4.54
3.14
2.54
4.04
3.00
3.00
3.00
34.12
ZONE SUBSTATIONS CIVIL AND STRUCTURAL UPGRADES
NEEDS STATEMENT A number of ageing zone substation buildings exist in our network and although these are maintained in accordance with a rigorous and structured maintenance regime there are instances where normal maintenance is simply not sufficient to remedy larger civil and structural defects. In such cases a capital project must be undertaken to remedy any issues. Examples of larger defects are seismic non-compliance and deterioration of a building due to soil movement where structural strengthening is then required. A typical example of a zone substation that is not seismically compliant is The Drive zone substation where the switchroom was constructed in 1930 and is seismically at-risk due to its construction methodology of the time – this building was also identified as a potential risk during a recent safety audit in terms of NZS7901, Public Safety, but has now been vacated and screened with fencing. The existing 11 kV switchroom at The Drive zone substation, now vacant, is currently listed as a Historic Place Category 2 protected building, and its historic façade will be incorporated into any civil/structural upgrade. There are also instances where deficient construction methodologies, e.g. improperly installed monolithic construction, was used in the not too distant past to construct some of our substations and these now require extensive repair work beyond normal maintenance.
TARGETED OUTCOMES
CUSTOMER EXPERIENCE
SAFETY
RELIABILITY
RESILIENCE
OPERATIONAL EFFICIENCY
CYBER SECURITY AND PRIVACY
OPTIONS CONSIDERED Options to address the need identified above have been assessed and are summarised in the following table.
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