β¨ Electricity Reliability Performance Measures
70
NEW ZEALAND GAZETTE
No. 3
B. RELIABILITY PERFORMANCE MEASURES (1999 REGULATIONS)
B1. Total number of interruptions, together with a breakdown of that total according to interruption class.
| Interruption Class | Number of Interruptions | |||
|---|---|---|---|---|
| 2002 | 2001 | 2000 | 1999 | |
| MainPower | Planned Shut-Down (Class B) | 154 | 94 | 106 |
| Unplanned Interruption (Class C) | 74 | 191 | 189 | |
| Trans Power | Planned Shut-Down (Class A) | 3 | - | 1 |
| Unplanned Interruption (Class D) | - | - | 1 | |
| Generation | Unplanned Interruption (Class E) | - | - | - |
| Generation Other | Unplanned Interruption (Class F) | - | - | - |
| Other | Other Interruptions (Class G) | - | - | - |
| Unplanned Interruption (Class G) | - | - | - | |
| Total | Interruptions | 231 | 285 | 297 |
B2. The total number of faults per 100 circuit kilometres of prescribed voltage electric line.
| Nominal Voltage | Faults per 100 km Total | |||
|---|---|---|---|---|
| 2002 | 2001 | 2000 | 1999 | |
| 33 kV | 1.40 | 1.78 | 2.04 | 3.32 |
| 11 kV | 2.09 | 5.52 | 5.92 | 4.30 |
| TOTAL | 2.03 | 5.24 | 5.51 | 4.23 |
B3. The total number of faults per 100 circuit kilometres of Underground prescribed voltage electric line, together with a breakdown of that total according to different nominal line voltages.
| Nominal Voltage | Faults per 100 km Underground | |||
|---|---|---|---|---|
| 2002 | 2001 | 2000 | 1999 | |
| 33 kV | - | - | - | - |
| 11 kV | 3.15 | 5.30 | 7.89 | 1.17 |
| TOTAL | 3.08 | 5.19 | 7.69 | 1.14 |
B4. The total number of faults per 100 circuit kilometres of Overhead prescribed voltage electric line, together with a breakdown of that total according to different nominal line voltages.
| Nominal Voltage | Faults per 100 km Overhead | |||
|---|---|---|---|---|
| 2002 | 2001 | 2000 | 1999 | |
| 33 kV | 1.41 | 1.79 | 0.75 | 3.35 |
| 11 kV | 2.06 | 5.53 | 5.86 | 4.40 |
| TOTAL | 2.01 | 5.24 | 5.45 | 4.31 |
B5. The SAIDI for the total of interruptions:
213.73 151.96 116.94 204.71
B6. The SAIDI for the total number of interruptions within each interruption class:
| Network or Generation Owner | Classification | Minutes per Connected Customer | |||
|---|---|---|---|---|---|
| 2002 | 2001 | 2000 | 1999 | ||
| MainPower | Planned Shut-Down (Class B) | 108.62 | 60.48 | 22.06 | 86.98 |
| Unplanned Interruption (Class C) | 52.12 | 91.48 | 71.55 | 103.27 | |
| Trans Power | Planned Shut-Down (Class A) | 52.98 | - | 22.27 | 14.46 |
| Unplanned Interruption (Class D) | - | - | 1.06 | - | |
| Generation | Unplanned Interruption (Class E) | - | - | - | - |
| Generation Other | Unplanned Interruption (Class F) | - | - | - | - |
| Other | Other Interruptions (Class G) | - | - | - | - |
| Unplanned Interruption (Class G) | - | - | - | - |
B7. The SAIFI for the total number of interruptions:
1.45 2.08 1.77 1.83
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Online Sources for this page:
VUW Te Waharoa —
NZ Gazette 2004, No 3
Gazette.govt.nz —
NZ Gazette 2004, No 3
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