New Zealand Gazette – 2005 – No. 200

Page 5082

✨ Electricity Information Disclosure



The Electricity Information Disclosure Requirements 2004

(For 12 months ending 30 June 2005, 30 June 2004, 30 June 2003, 30 June 2002)

Part 4

Energy Delivery Efficiency Performance Measures and Statistics

(Disclosure under Requirement 20)

1. Energy delivery efficiency performance measures

2004/05 2003/04 2002/03 2001/02

(a) Load factor
Electrical energy entering the transmission system as percentage of maximum demand times hours per year
| % | 69.70 | 71.05 | 70.50 | 67.09 |

(b) Loss ratio
Transmission losses as percentage of energy entering the system
| % | 3.76 | 3.82 | 4.36 | 2.90 |

(c) Capacity utilisation
Maximum demand as percentage of total transformer capacity
| Based on ONAN ratings # | % | 70.89 | 69.49 | 69.86 | 70.71 |
| Based on Maximum Continuous Ratings | % | 49.72 | 48.17 | 50.81 | 51.87 |

2. Statistics

(a) System length, broken down by voltage

km 2004/05 2003/04 2002/03 2001/02
Total ^& 17,045 17,041 17,134 17,145
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) 8,380 8,376 8,357 8,357
110 kV (HVAC) 6,073 6,073 6,076 6,108
66/50/33/11 kV (HVAC) ^& 1,339 1,339 1,449 1,428

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

km 2004/05 2003/04 2002/03 2001/02
Total ^& 16,960 16,956 17,049 17,066
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) 8,380 8,376 8,357 8,357
110 kV (HVAC) 6,068 6,068 6,071 6,103
66/50/33/11 kV (HVAC) ^& 1,339 1,339 1,449 1,434

Note: HVDC link submarine power cables measure approximately 80km. Broken down by voltage
| 350 kV (HVDC) | km | 40 | 40 | 40 | 40 |
| 270 kV (HVDC) | km | 40 | 40 | 40 | 40 |

(c) Total circuit length of underground electric lines
(110 kV HVAC) | km | 5 | 5 | 5 | 5 |

(d) Transformer capacity (kilovolt amperes)

2004/05 2003/04 2002/03 2001/02
ONAN Ratings # kVA 8.94×10^6 8.77×10^6 8.64×10^6
Maximum Continuous Ratings kVA 12.75×10^6 12.65×10^6 11.87×10^6

(e) Maximum demand (kilowatts) ^†
| kW | 6.34×10^6 | 6.09×10^6 | 6.04×10^6 | 6.07×10^6 |

**(f) Total electricity entering the system (before losses of electricity). In kilowatt hours: ***
| kWh | 38.71×10^9 | 38.02×10^9 | 37.28×10^9 | 35.70×10^9 |

(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: **
| kWh | 37.25×10^9 | 36.57×10^9 | 35.65×10^9 | 34.66×10^9 |

(h) Total connected customers
| | 48 | 48 | 48 | 49 |

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

    ONAN = Oil natural, air natural ratings.

    @ Including sales to direct connected customers.
    & 2003/04, 2004/05 data excludes circuits leased from others and operated by Transpower. 34km owned by Transpower but operated by others not included above.
    † 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.



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VUW Te Waharoa — PDF NZ Gazette 2005, No 200


Gazette.govt.nz — PDF NZ Gazette 2005, No 200




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🏭 Energy Delivery Efficiency Performance Measures and Statistics for Transpower New Zealand Limited (continued from previous page)

🏭 Trade, Customs & Industry
Energy Delivery, Efficiency, Performance Measures, Statistics, Transmission System, Load Factor, Loss Ratio, Capacity Utilisation, Transformer Capacity, Maximum Demand, Electricity Supply, Transpower New Zealand Limited