Unison Networks
 | |
| Industry | Electricity distribution |
|---|---|
| Predecessor | Hawke's Bay Electric Power Board |
| Founded | 1924 |
| Headquarters | Hastings, New Zealand |
Area served | Hawkes Bay, Rotorua, Taupo |
Key people |
Kevin Atkinson (Chair) Ken Sutherland (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 and fibre optic network company, based in Hastings, New Zealand.
Unison owns and manages the electricity lines network and the fibre optic network in the Hawke's Bay, Rotorua and Taupo regions. The service area covers 12,000 km2.[2] The Unison group also provides electrical, fibre, civil and vegetation contracting services, manufactures electrical products and operates an insurance company.[1]
Ownership
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
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
| Parameter | Value | ||
|---|---|---|---|
| Napier-Hastings | Rotorua & Taupo | Total | |
| Total system length | 5,477 km | 3,607 km | 9,083 km |
| 33 kV | 292 km | 199 km | 491 km |
| 11 kV | 2,465 km | 2,154 km | 4,618 km |
| Single wire earth return (SWER) | 2 km | 127 km | 129 km |
| Low voltage (230/400 V) | 2,718 km | 1,127 km | 3,845 km |
| Street lighting | 994 km | 3,607 km | 1,677 km |
| Customer connections | 62,988 | 47,588 | 110,576 |
| System Maximum Demand | 182 MW | 144 MW | 313 MW |
| Total Energy Delivered | 959 GWh | 678 GWh | 1,637 GWh |
Network performance
Unison reported the normalised performance of the network for the 2014/15 year as follows:[1]
| Parameter | Value | ||
|---|---|---|---|
| Napier-Hastings | Rotorua & Taupo | 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
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
- Unison Contracting Services Limited
- Unison Energy Limited
- Unison Fibre Limited
- Unison Insurance Limted
- ETEL Limited
See also
References
- 1 2 3 4 5 6 "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 2015" (PDF). 31 August 2015. Retrieved 2 April 2016.
- ↑ "Unison's History". Unison.