DISCLOSURE OF ENERGY EFFICIENCY PERFORMANCE MEASURES AND STATISTICS PURSUANT TO SCHEDULE 1, PART 4 OF THE ELECTRICITY INFORMATION DISCLOSURE REQUIREMENTS 2004
1. Energy Delivery Efficiency
Performance Measures
2004
2003
2002
2001
(a) Load Factor
77.87%
77.38%
74.85%
74.85%
(b) Loss Ratio
- Loss Ratio
3.54%
3.13%
4.50%
2.00%
- Loss Ratio Estimated
*3.70%
*3.70%
*3.60%
*3.50%
(c) Capacity Utilisation
*31.82%
32.35%
32.70%
32.59%
*Estimated
2. Statistics
(a) System length, broken down by voltage:
Voltage
2004
2003
2002
2001
- 33 kV
235.0 km
230.4 km
229.6 km
208.0 km
- 11 kV
3,197.0 km
3,194.1 km
3,137.0 km
3,143.0 km
- 400V
1,873.0 km
2,006.0 km
1,970.0 km
1,933.0 km
- Total
5,305.0 km
5,430.5 km
5,336.6 km
5,284.0 km
(b) Circuit length of overhead lines, broken down by voltage:
Voltage
2004
2003
2002
2001
- 33 kV
219.0 km
213.0 km
213.0 km
195.0 km
- 11 kV
3,093.0 km
3,097.0 km
3,050.0 km
3,085.0 km
- 400V
1,557.0 km
1,733.0 km
1,716.0 km
1,697.0 km
- Total
4,869.0 km
5,043.0 km
4,979.0 km
4,957.0 km
(c) Circuit length of underground cables broken down by voltage:
Voltage
2004
2003
2002
2001
- 33 kV
16.0 km
17.4 km
16.6 km
13.0 km
- 11 kV
104.0 km
97.1 km
87.0 km
78.0 km
- 400V
316.0 km
273.0 km
254.0 km
236.0 km
- Total
436.0 km
387.5 km
357.6 km
327.0 km
(d) Transformer capacity
Year
Capacity
2004
414,440 kVA
2003
406,885 kVA
2002
397,445 kVA
2001
393,000 kVA
(e) Maximum demand
Year
Demand
2004
131,880 kW
2003
131,560 kW
2002
129,978 kW
2001
128,094 kW
(f) Total electricity entering the system - kWh
Year
kWh
2004
899,599,208
2003
891,815,703
2002
852,225,151
2001
*839,887,658
*Restated to include Losses
(g) Total electricity supplied from the system for other retailers