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 which facilitate this movement are known as 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.
Transpower New Zealand Limited (TPNZ) is the state-owned enterprise responsible for electric power transmission in New Zealand. It performs two major functions in the New Zealand electricity market. As the owner of the National Grid it provides the infrastructure of electric power transmission that allows consumers to have access to generation from a wide range of sources, and enables competition in the wholesale electricity market; as System Operator it manages the real-time operation of the grid and the physical operation of the electricity market.
Cheung Kong (Holdings) Limited, was a multinational conglomerate, based in Hong Kong. It was one of Hong Kong's leading multi-national conglomerates. The company merged with its subsidiary Hutchison Whampoa on 3 June 2015, as part of a major reorganisation, to become part of CK Hutchison Holdings.
Vector Limited is an electricity and gas distribution company in Auckland, New Zealand. It is the national number one provider of electricity distribution, number one provider of electricity and gas metering and number two wholesaler of LPG. It also owns a fibre optic cable network.
Power Assets Holdings Limited, formerly Hongkong Electric Holdings Limited, is a vertically integrated electric utility company. It is the majority shareholder in the Hongkong Electric Company, having reduced its holding in the company through a series of share sales, the most recent being in June 2015.
Powerco is the second-largest gas and largest electricity distributor in New Zealand. It is one of only two companies to distribute both electricity and natural gas through their network. Its network delivers electricity and gas to households around the North Island from the national electricity transmission network Transpower and the natural gas transmission system owned and operated by Vector Limited.
SA Power Networks is the sole electricity distributor in the state of South Australia, delivering electricity from high voltage transmission network connection points operated by ElectraNet. It is the successor to the state-owned Electricity Trust of South Australia.
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.
CK Infrastructure Holdings Limited (CKI), is the largest publicly listed infrastructure company in Hong Kong with diversified investments in energy infrastructure, transportation Infrastructure, water Infrastructure and infrastructure related business, parented by CK Hutchison Holdings, businessman Li Ka Shing's flagship company. It is a leading player in the global infrastructure arena in Hong Kong, Mainland China, Australia, New Zealand, the United Kingdom, Continental Europe and North America. The chairman is Victor Li, the elder son of Li Ka Shing.
First Pacific Company Limited is a Hong Kong-based investment management and holding company with operations located in Asia. It involves telecommunications, consumer food products and infrastructure.
The National Grid is the nationwide system of electric power transmission in New Zealand. The national electricity transmission grid is owned, operated, and maintained by state-owned enterprise Transpower New Zealand, 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.
Aurora Energy is New Zealand's seventh largest electricity distribution network by customer connections, supplying electricity to 91,600 homes, farms and businesses in Dunedin, Central Otago, and the Queenstown-Lakes District. Aurora Energy is owned by Dunedin City Holdings Limited on behalf of the Dunedin City Council.
UK Power Networks is a distribution network operator for electricity covering South East England, the East of England and London. It manages three licensed distribution networks which together cover an area of 30000 square kilometres and approximately eight million customers.
The Hongkong Electric Company is one of Hong Kong's two main electricity generation companies, the other being China Light & Power. The company is owned by several companies including Power Assets Holdings, State Grid Corporation of China, Cheung Kong Infrastructure Holdings and Qatar Investment Authority. It was the first company to provide electricity in Hong Kong, having run continually since the 19th century.
WEL Networks Limited is an electricity distribution company, serving the northern and central Waikato region of New Zealand. WEL is the fifth largest electricity distribution companies in New Zealand, with over 80,000 connections and 5,226 km of lines.
Marlborough Lines Limited is an electricity distribution company, based in Blenheim, New Zealand. Marlborough Lines is responsible for subtransmission and distribution of electricity to approximately 26,000 customers in the Marlborough Region over a service area of 11,330 km2 (4,370 sq mi). The network includes approximately 3,400 km (2,100 mi) of power lines extending to some very isolated areas across the region, including the extremities of the Marlborough Sounds, which can only be reached by boat or helicopter.
Electricity Ashburton Limited, trading as EA Networks is a co-operatively-owned electricity distribution company, based in Ashburton, New Zealand.
Northpower Limited (Northpower) is an electricity distribution company, based in Whangarei, New Zealand.
CK Hutchison Holdings Limited is a Hong Kong-based and Cayman Islands-registered multinational conglomerate corporation. The company was formed in March 2015 through the merger of Cheung Kong Holdings and its main associate company Hutchison Whampoa. It has four core businesses ‐ ports and related services, retail, infrastructure and telecommunications - which operate in over 50 countries, as well as several other investments around the world.
Electric Kiwi is an independent online New Zealand electricity retailer.
