New Zealand Gazette – 2008 – No. 186

Page 4910

✨ Electricity Information Disclosure



4910 NEW ZEALAND GAZETTE, No. 186 28 NOVEMBER 2008

1 The Electricity Information Disclosure Requirements

(For 12 months ending 30 June 2008, 2007, 2006, 2005)

Part 4

Energy Delivery Efficiency Performance Measures and Statistics
(Disclosure under Requirement 20)

1. Energy delivery efficiency performance measures

(a) Load factor (%)
Electrical energy entering the transmission system as percentage of maximum demand times hours per year

2007/08 2006/07 2005/06 2004/05
68.35 66.60 66.50 69.70

(b) Loss ratio (%)
Transmission losses as percentage of energy entering the system

2007/08 2006/07 2005/06 2004/05
3.66 3.74 3.63 3.76

(c) Capacity utilisation (%)
Maximum demand as percentage of total transformer capacity
Based on Maximum Continuous Ratings

2007/08 2006/07 2005/06 2004/05
48.10 50.37 51.61 49.72

2. Statistics

(a) System length, broken down by voltage (km)

Total a 2007/08 2006/07 2005/06 2004/05
Total a 17,333 17,334 17,248 17,045
350 kV (HVDC) 611 611 611 611
270 kV (HVDC) 611 611 611 611
0 kV (HVDC earth electrode) 31 31 31 31
220 kV (HVAC) 8,631 8,617 8,611 8,380
110 kV (HVAC) 6,298 6,299 6,219 6,073
66/50/33/11 kV (HVAC) a 1,151 1,165 1,165 1,339

(b) Circuit length of overhead electric lines, broken down by voltage (km).

Total a 2007/08 2006/07 2005/06 2004/05
Total a 17,248 17,249 17,163 16,960
350 kV (HVDC) 571 571 571 571
270 kV (HVDC) 571 571 571 571
0 kV (HVDC earth electrode) 31 31 31 31
220 kV (HVAC) 8,631 8,617 8,611 8,380
110 kV (HVAC) 6,293 6,294 6,214 6,068
66/50/33/11 kV (HVAC) a 1,151 1,165 1,165 1,339

NB: HVDC link submarine power cables measure approximately 80km. Broken down by voltage

2007/08 2006/07 2005/06 2004/05
350 kV (HVDC) 40 40 40 40
270 kV (HVDC) 40 40 40 40

(c) Total circuit length of underground electric lines (km)
( 110 kV HVAC)

2007/08 2006/07 2005/06 2004/05
5 5 5 5

(d) Transformer capacity (Maximum Continuous Ratings) (kVA)

2007/08 2006/07 2005/06 2004/05
13.80x10^6 13.31x10^6 12.88x10^6 12.75x10^6

(e) Maximum demand (kilowatts) bc (kW)

2007/08 2006/07 2005/06 2004/05
6.64x10^6 6.71x10^6 6.65x10^6 6.34x10^6

(f) Total electricity entering the system (before losses) bc (kWh)

2007/08 2006/07 2005/06 2004/05
39.72x10^9 39.13x10^9 38.73x10^9 38.71x10^9

(g) Total amount of electricity (in kilowatt hours) supplied from the system (after losses of electricity) during the financial year on behalf of each person that is an electricity generator or an electricity retailer, or both: bcd (kWh)

2007/08 2006/07 2005/06 2004/05
38.27x10^9 37.66x10^9 37.33x10^9 37.25x10^9

(h) Total connected customers

2007/08 2006/07 2005/06 2004/05
49 48 47 48

Notes

a Excludes 61km of circuits leased from others and operated by Transpower, and 34 km owned by Transpower but operated by others.

b To 2 decimal places only, higher accuracy used in calculations.

c For all years, figures for maximum demand kW and kWh injected and supplied include loads on circuits leased by Transpower. The effect of these circuits cannot be measured as metering equipment is not installed at the inter-connection points with Transpower-owned assets, but the difference is estimated to be no more than 0.1% of totals. Loads on Transpower assets leased to others are not included as Transpower does not collect operational data for these assets.

d Including sales to direct connected customers



Next Page →



Online Sources for this page:

Gazette.govt.nz — PDF NZ Gazette 2008, No 186




✨ LLM interpretation of page content

🏭 Electricity Information Disclosure Requirements for 2008, 2007, 2006, 2005

🏭 Trade, Customs & Industry
Electricity, Information Disclosure, Energy Delivery Efficiency, Statistics, Transmission System