Unison Networks
 | |
| Industry | Electricity distribution |
|---|---|
| Predecessor | Hawke's Bay Electric Power Board |
| Founded | 1924 |
| Headquarters | , |
Area served | Hawkes Bay, Rotorua, Taupō |
Key people | Philip Hocquard (Chair) Jaun Park (CEO) |
| Revenue | $210m[1] |
| $27m[1] | |
| Total assets | $721m[1] |
| Total equity | $343m[1] |
| Parent | Hawke's Bay Power Consumers' Trust |
| Website | www |
Unison Networks Limited (Unison) is an electricity distribution based in Hastings, New Zealand.
Unison owns and manages the electricity lines network in the Hawke's Bay, Rotorua and Taupō regions. The service area covers 12,000 km2.[2] The Unison group also provides electrical, civil, and vegetation contracting services; manufactures electrical products; and operates an insurance company.[1]
Ownership
[edit]The company is 100% owned by the Hawke's Bay Power Consumers' Trust on behalf of electricity consumers in the Hawke's Bay area. The Trust is made up of five elected Trustees and operates under a Trust Deed.[3]
Distribution network
[edit]The Unison subtransmission and distribution network is supplied from the national grid via Transpower substations. Seven Transpower grid exit points (GXPs) supply the Unison network: Redclyffe, Fernhill, and Whakatu for Napier-Hastings; Wairakei for Taupo; and Rotorua, Owhata, and Takurenga for Rotorua.
Network statistics
[edit]| Parameter | Value | ||
|---|---|---|---|
| Napier-Hastings | Rotorua & Taupō | Total | |
| Total system length | 5,560 km | 3,786 km | 9,347 km |
| 33 kV | 289 km | 208 km | 497 km |
| 11 kV | 2,521 km | 2,126 km | 4,647 km |
| Single wire earth return (SWER) | – | 111 km | 111 km |
| Low voltage (230/400 V) | 2,750 km | 1,341 km | 4,091 km |
| Customer connections | 65,721 | 50,003 | 115,724 |
| System maximum demand | 213 MW | 127 MW | 339 MW |
| Total energy delivered | 1,027 GWh | 682 GWh | 1,710 GWh |
Network performance
[edit]Unison reported the normalised performance of the network for the 2014/15 year as follows:[1]
| Parameter | Value | ||
|---|---|---|---|
| Napier-Hastings | Rotorua & Taupō | Total | |
| System Average Interruption Duration Index (SAIDI) | 89.6 mins | 149.2 mins | 115.3 mins |
| System Average Interruption Frequency Index (SAIFI) | 1.74 | 2.29 | 1.97 |
History
[edit]Early in the twentieth century, electricity generation and distribution was managed by local councils or municipal departments. An electricity network was established in Hastings in 1912, with a power house in Eastbourne Street. Following changes to national legislation, the Hawke's Bay Electric Power Board was formed in 1924.[5]
Subsidiaries
[edit]- Unison Contracting Services Limited
- Unison Energy Limited
- Unison Fibre Limited
- Unison Insurance Limited
- ETEL Limited
- RPS Switchgear
- PBA - The High Voltage Experts
See also
[edit]References
[edit]- ^ a b c d e f "Annual Report 2015". Unison. 4 November 2015.
- ^ "Asset Management Plan 2015" (PDF). Unison. 30 March 2015.
- ^ "Hawke's Bay Power Consumers' Trust". Unison. Retrieved 21 January 2016.
- ^ "EDB Information Disclosure - Unison Networks Limited - year ending 31 March 2021" (PDF). 31 August 2016. Retrieved 2 February 2022.
- ^ "Unison's History". Unison.