Unison Networks Limited (Unison) is an electricity distribution based in Hastings, New Zealand.
| 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 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
editThe 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
editThe 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
editUnison 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
editEarly 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
editReferences
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.