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New Zealand Gazette – 2011 – No. 184

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✨ Electricity Information Disclosure

5354 NEW ZEALAND GAZETTE, No. 184 28 NOVEMBER 2011

The Electricity Information Disclosure Requirements

(For 12 months ending 30 June 2011, 2010, 2009, and 2008)

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

	2010/11	2009/10	2008/09	2007/08
	69.47	68.49	67.02	68.35

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

	2010/11	2009/10	2008/09	2007/08
	3.79	3.72	4.02	3.66

(c) Capacity utilisation (%)
Maximum demand as percentage of total transformer capacity

	2010/11	2009/10	2008/09	2007/08
	45.28	46.27	46.93	48.10

2. Statistics

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

	2010/11	2009/10	2008/09	2007/08
Total ^a	17,198	17,348 ^e	17,340	17,333
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)	8,642	8,642 ^e	8,632	8,631
110 kV (HVAC)	6,152	6,302	6,304	6,298
66/50/33/11 kV (HVAC) ^a	1,151	1,151 ^e	1,151	1,151

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

	2010/11	2009/10	2008/09	2007/08
Total ^a	17,108	17,256 ^e	17,255	17,248
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)	8,642	8,642 ^e	8,632	8,631
110 kV (HVAC)	6,142	6,290	6,299	6,293
66/50/33/11 kV (HVAC) ^a	1,151	1,151 ^e	1,151	1,151

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

	2010/11	2009/10	2008/09	2007/08
350 kV (HVDC)	40	40	40	40
270 kV (HVDC)	40	40	40	40

(c) Total circuit length of underground electric lines (km)

	2010/11	2009/10	2008/09	2007/08
(110 kV HVAC)	11	11	4	4

(d) Transformer capacity (kVA)

	2010/11	2009/10	2008/09	2007/08
	14.51x10⁶	14.26x10⁶	14.09x10⁶	13.80x10⁶

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

	2010/11	2009/10	2008/09	2007/08
	6.57x10⁶	6.60x10⁶	6.61x10⁶	6.64x10⁶

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

	2010/11	2009/10	2008/09	2007/08
	39.98x10⁹	39.58x10⁹	38.82x10⁹	39.72x10⁹

(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. ^bc (kWh)

	2010/11	2009/10	2008/09	2007/08
	38.47x10⁹	38.10x10⁹	37.26x10⁹	38.27x10⁹

(h) Total connected customers

	2010/11	2009/10	2008/09	2007/08
	53	53	51	49

Notes

a Excludes 61km of circuits leased from others and operated by Transpower.
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
e Minor corrections to previously disclosed 2009/10 data.

Gazette.govt.nz — NZ Gazette 2011, No 184

The Executive Wing of Parliament (depicted) is universally known as The Beehive. It was completed in 1977 and remains the primary office for the elected Government of the day.

✨ LLM interpretation of page content

💰 Annual Depreciated Historic Cost Reconciliation Report for Transpower New Zealand Limited Lines Business (continued from previous page)

Domain💰 Finance & Revenue
KeywordsFinancial report, Depreciated historic cost, System fixed assets, Impairments

🌾 Energy Delivery Efficiency Performance Measures and Statistics

Domain🌾 Primary Industries & Resources
KeywordsElectricity, Energy delivery, Load factor, Loss ratio, Capacity utilisation, System length, Circuit length, Transformer capacity, Maximum demand, Electricity supply

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