Electric power transmission is the bulk movement of electrical energy from a generating site, such as a power plant, to an electrical substation. The interconnected lines that facilitate this movement form a transmission network. This is distinct from the local wiring between high-voltage substations and customers, which is typically referred to as electric power distribution. The combined transmission and distribution network is part of electricity delivery, known as the electrical grid.
Electric power distribution is the final stage in the delivery of electricity. Electricity is carried from the transmission system to individual consumers. Distribution substations connect to the transmission system and lower the transmission voltage to medium voltage ranging between 2 kV and 33 kV with the use of transformers. Primary distribution lines carry this medium voltage power to distribution transformers located near the customer's premises. Distribution transformers again lower the voltage to the utilization voltage used by lighting, industrial equipment and household appliances. Often several customers are supplied from one transformer through secondary distribution lines. Commercial and residential customers are connected to the secondary distribution lines through service drops. Customers demanding a much larger amount of power may be connected directly to the primary distribution level or the subtransmission level.
Christchurch is the largest city in the South Island of New Zealand and the seat of the Canterbury Region. Christchurch lies on the South Island's east coast, just north of Banks Peninsula on Pegasus Bay. The Avon River / Ōtākaro flows through the centre of the city, with an urban park along its banks. The city's territorial authority population is 389,300 people, and includes a number of smaller urban areas as well as rural areas. The population of the urban area is 377,900 people. Christchurch is the second-largest city by urban area population in New Zealand, after Auckland. It is the major urban area of an emerging sub-region known as Greater Christchurch. Notable smaller urban areas within this sub-region include Rangiora and Kaiapoi in Waimakariri District, north of the Waimakariri River, and Rolleston and Lincoln in Selwyn District to the south.
The HVDC Inter-Island link is a 610 km (380 mi) long, 1200 MW high-voltage direct current (HVDC) transmission system connecting the electricity networks of the North Island and South Island of New Zealand together. It is commonly referred to as the Cook Strait cable in the media and in press releases, although the link is much longer than its Cook Strait section. The link is owned and operated by state-owned transmission company Transpower New Zealand.
Haywards is a small hillside suburb in the Hutt Valley near Wellington, New Zealand. It is notable for its large electrical substation, which is the main switching point for the Wellington region, and the home of the North Island converter station for the HVDC Inter-Island, which links the North and South Island electricity networks together.
Waimakariri is a New Zealand parliamentary electorate, formed for the 1996 election and returning one Member of Parliament to the New Zealand House of Representatives. The MP for Waimakariri is Matt Doocey of the National Party. He has held this position since the 2014 election and takes over from Kate Wilkinson, who defeated Clayton Cosgrove (Labour) in the 2011 election.
The Christchurch tramway system was an extensive network in Christchurch, New Zealand, with steam and horse trams from 1882. Electric trams ran from 1905 to 1954, when the last line from Cashmere to Papanui was replaced by buses.
Powercor Australia is an Australian electricity distribution company that operates throughout western Victoria, and the western suburbs of Melbourne.
The electricity sector in New Zealand uses mainly renewable energy, such as hydropower, geothermal power and increasingly wind energy. As of 2019, 82% of electricity is generated from renewable sources, making New Zealand one of the countries with the lowest carbon dioxide emissions from electricity generation. Electricity demand grew by an average of 2.1% per year from 1974 to 2010 but decreased by 1.2% from 2010 to 2013.
Dallington is a suburb of Christchurch, New Zealand, on the north-east side of the city.
Christchurch City Holdings Ltd (CCHL) is a wholly owned investment arm of the Christchurch City Council. The council controlled trading organisations (CCTO) own and run some of the important infrastructure in Christchurch, such as the public transport and electricity delivery in the city.
The National Grid is the nationwide system of electric power transmission in New Zealand. The grid is owned, operated and maintained by Transpower New Zealand, a state-owned enterprise, although some lines are owned by local distribution companies and leased to Transpower. In total, the national grid contains 11,803 kilometres (7,334 mi) of high-voltage lines and 178 substations.
The 2010 Canterbury earthquake struck the South Island of New Zealand with a moment magnitude of 7.1 at on 4 September, and had a maximum perceived intensity of X (Extreme) on the Mercalli intensity scale. Some damaging aftershocks followed the main event, the strongest of which was a magnitude 6.3 shock known as the Christchurch earthquake that occurred nearly six months later on 22 February 2011. Because this aftershock was centred very close to Christchurch, it was much more destructive and resulted in the deaths of 185 people.
Christchurch tramway routes have developed from lines that were first established by a troika of private tramway companies in the latter part of the 19th century, through to a significantly expanded system under the municipal Christchurch Tramway Board, to the City Council-built heritage circuit. These routes have been worked by all three main forms of tramway motive power and have significantly contributed to the development of Christchurch City in New Zealand's South Island.
A major earthquake occurred in Christchurch on Tuesday 22 February 2011 at 12:51 p.m. local time. The 6.2 earthquake struck the entire of the Canterbury region in the South Island, centred 6.7 kilometres (4.2 mi) south-east of the central business district. It caused widespread damage across Christchurch, killing 185 people, in New Zealand's fifth-deadliest disaster.
MainPower New Zealand Limited is an electricity distribution company, based in Rangiora, New Zealand, responsible for electricity distribution to nearly 42,000 customers in the Canterbury region north of the Waimakariri River. MainPower was formed in 1993, after the Energy Companies Act 1992 required the North Canterbury Electric Power Board to reform into a commercial power company. More reforms in 1998 required electricity companies nationally to split their lines and retail businesses, with MainPower retaining its lines business and selling its retail business to Contact Energy.
Electricity Ashburton Limited, trading as EA Networks is a co-operatively-owned electricity distribution company, based in Ashburton, New Zealand.
East Lake is an open water course under consideration in Christchurch, New Zealand. The facility, located within the residential red zone adjacent to the Avon River, would be suitable for international rowing regattas. The facility is estimated at NZ$160m to construct.
A residential red zone is any of several areas of land in and around Christchurch, New Zealand, that experienced severe damage in the 2010 and 2011 Christchurch earthquakes and were deemed infeasible to rebuild on. Through voluntary buyouts, the Crown acquired and demolished or removed over 8,000 properties. The majority were located in a broad swath of the eastern suburbs along the Avon River / Ōtākaro that had suffered damage from soil liquefaction.
