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Transpower New Zealand Limited
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. Transpower was initially formed as an operating division of the Electricity Corporation of New Zealand (ECNZ) in 1987. In 1994 it was separated from ECNZ and corporatised to become a state-owned enterprise with its own board of directors and ministerial shareholders, the Minister of Finance and the Minister of State-Owned Enterprises. The New Zealand Treasury's Commercial Operations group (formerly the Crown Ownership Monitori ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
State-owned Enterprises Of New Zealand
State-owned enterprises (SOEs) in New Zealand are registered companies listed under Schedules 1 and 2 of the ''State-Owned Enterprises Act 1986''. Most SOEs are former government departments or agencies that were corporatised. They are responsible to the Minister of State Owned Enterprises. Many other government-owned companies and statutory trading organisations are referred to informally as "state-owned enterprises" although they are not SOEs in the strictest sense. These are also listed here. Function The function of SOEs is to operate successfully as a business, as profitable as those not owned by the Crown. The section of the Act defining this is usually interpreted as meaning that SOEs are expected to ready themselves for privatisation, though this is not always the case. Two Ministers of the Crown act as the shareholding ministers in the company. In the case of SOEs these are usually the Minister of State Owned Enterprises (see article for list) and the Minister resp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mercury Energy
Mercury NZ Limited is a New Zealand electricity generation and multi-product utility retailer of electricity, gas, broadband and mobile telephone services. All the company's electricity generation is renewable. In August 2021, Mercury acquired five operating wind farms and several wind farm development options from Tilt Renewables. At the same time, the first power from the newly built wind farm at Turitea was generated – adding to the existing portfolio of nine hydro stations on the Waikato River and five geothermal plants located in the central North Island. In the year ended June 2021, Mercury had generated 3,611GWh of electricity through hydro generation and 2,594GWh through geothermal generation. In May 2022, Mercury acquired the retail business of Trustpower, including the retail customer base and Trustpower brand. The generation business of Trustpower changed its name to Manawa Energy Limited. In June 2022, Mercury launched fibre broadband as a retail product to be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Power Transmission System Operators In New Zealand
Electricity is the set of physics, physical Phenomenon, phenomena associated with the presence and motion of matter that has a property of electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwell's equations. Various common phenomena are related to electricity, including lightning, static electricity, electric heating, electric discharges and many others. The presence of an electric charge, which can be either positive or negative, produces an electric field. The movement of electric charges is an electric current and produces a magnetic field. When a charge is placed in a location with a non-zero electric field, a force will act on it. The magnitude of this force is given by Coulomb's law. If the charge moves, the electric field would be doing Work (physics), work on the electric charge. Thus we can speak of electric potential at a certain point in space, which is equal to the work done by an externa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electricity Sector In New Zealand
The electricity sector in New Zealand uses mainly renewable energy, such as Hydroelectricity, hydropower, geothermal energy, geothermal power and increasingly wind energy. , 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. The New Zealand electricity market, electricity market is regulated by the Electricity Authority (New Zealand), Electricity Authority. Electricity lines businesses, including Transpower New Zealand, Transpower and the distribution lines companies, are regulated by the Commerce Commission. Control is also exerted by the minister of energy in the New Zealand Cabinet, though the minister for state-owned enterprises and the minister for climate change also have some powers by virtue of their positions and policy influence in the governme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electricity Authority (New Zealand)
The New Zealand Electricity Authority ( mi, Te Mana Hiko) is an independent Crown entity responsible for the regulation of the New Zealand electricity market. The Authority was established in November 2010, following a government review of the electricity industry, and replaced the Electricity Commission. The Authority has a narrower focus on industry competition, reliability and efficiency than the Electricity Commission had. The key functions performed by the Authority are: * Registering industry participants * Developing and administering the Electricity Industry Participation Code * Monitoring and enforcing compliance with the Code * Acting as Market Administrator and contracting providers of market operations services * Facilitating market performance through information, best-practice guidelines and related services; and * Undertaking sector reviews Functions that were performed by the Commission, but which are undertaken by agencies other than the Authority include: * Co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Commerce Commission
The Commerce Commission ( mi, Te Komihana Tauhokohoko) is a New Zealand government agency with responsibility for enforcing legislation that relates to competition in the country's markets, fair trading and consumer credit contracts, and regulatory responsibility for areas such as electricity and gas, telecommunications, dairy products and airports. It is an independent Crown entity established under the Commerce Act 1986. Although responsible to the Minister of Commerce and Consumer Affairs and the Minister of Broadcasting, Communications and Digital Media, the Commission is run independently from the government, and is intended to be an impartial promotor and enforcer of the law. The Commission undertakes investigations into potential breaches of the Commerce Act 1986 and where appropriate, takes court action. It considers applications for authorisations and clearances in relation to anti-competitive behaviour and mergers, in circumstances where the public benefit outweighs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transformer
A transformer is a passive component that transfers electrical energy from one electrical circuit to another circuit, or multiple circuits. A varying current in any coil of the transformer produces a varying magnetic flux in the transformer's core, which induces a varying electromotive force (EMF) across any other coils wound around the same core. Electrical energy can be transferred between separate coils without a metallic (conductive) connection between the two circuits. Faraday's law of induction, discovered in 1831, describes the induced voltage effect in any coil due to a changing magnetic flux encircled by the coil. Transformers are used to change AC voltage levels, such transformers being termed step-up or step-down type to increase or decrease voltage level, respectively. Transformers can also be used to provide galvanic isolation between circuits as well as to couple stages of signal-processing circuits. Since the invention of the first constant-potential transfo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrical Substation
A substation is a part of an electrical generation, transmission, and distribution system. Substations transform voltage from high to low, or the reverse, or perform any of several other important functions. Between the generating station and consumer, electric power may flow through several substations at different voltage levels. A substation may include transformers to change voltage levels between high transmission voltages and lower distribution voltages, or at the interconnection of two different transmission voltages. They are a common component of the infrastructure, for instance there are 55,000 substations in the United States. Substations may be owned and operated by an electrical utility, or may be owned by a large industrial or commercial customer. Generally substations are unattended, relying on SCADA for remote supervision and control. The word ''substation'' comes from the days before the distribution system became a grid. As central generation stations became ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
High-voltage Direct Current
A high-voltage direct current (HVDC) electric power transmission system (also called a power superhighway or an electrical superhighway) uses direct current (DC) for electric power transmission, in contrast with the more common alternating current (AC) transmission systems. Most HVDC links use voltages between 100 kV and 800 kV. However, a 1,100 kV link in China was completed in 2019 over a distance of with a power capacity of 12 GW. With this dimension, intercontinental connections become possible which could help to deal with the fluctuations of wind power and photovoltaics. HVDC allows power transmission between AC transmission systems that are not synchronized. Since the power flow through an HVDC link can be controlled independently of the phase angle between source and load, it can stabilize a network against disturbances due to rapid changes in power. HVDC also allows the transfer of power between grid systems running at different frequencies, such ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HVDC Inter-Island
The HVDC Inter-Island link is a long, 1200 MegaWatt, 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 enterprises of New Zealand, state-owned transmission company Transpower New Zealand. The HVDC link starts in the South Island at the Benmore Power Station, Benmore Hydroelectric Power Station, on the Waitaki River in Canterbury, New Zealand, Canterbury and then it travels on an overhead transmission line through inland Canterbury and Marlborough to Fighting Bay in the Marlborough Sounds. From Fighting Bay, the link travels 40 km via submarine cables underneath Cook Strait to Cape Terawhiti, Oteranga Bay, near Wellington, before travelling the final 37 km on overhead li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whakamaru To Brownhill Road Transmission Line
The Whakamaru to Brownhill Road transmission line is a double-circuit 400 kV-capable transmission line constructed by Transpower to increase the capacity of the National Grid between the southern Waikato and the city of Auckland. The line runs from the Whakamaru sub-station near the Whakamaru Power Station, over a distance of to the new Brownhill Road substation near Whitford in southeastern Auckland. The line will initially be operated at 220 kV. From Brownhill Road, 220 kV underground cables connect the line to the Pakuranga sub-station in eastern Auckland. The project was the subject of considerable controversy and protest during the planning and approval stages. Construction of the line started in February 2010, and the line was commissioned on 30 October 2012. The transmission line forms the major part of a wider North Island Grid Upgrade project with a forecast cost to completion of $894 million. Overview The line was a major enhancement to the National ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orion New Zealand Limited
Orion New Zealand Limited (Orion) is an electricity distribution company, based in Christchurch, New Zealand. The company was formed under its current name in December 1998. Orion is owned by Christchurch City Council (89.3%) and Selwyn District Council (10.7%). In 2013, Orion posted a $49m profit, with $32m in dividends going to the shareholding councils. Its last CEO was Roger Sutton, who resigned to become CEO of the Canterbury Earthquake Recovery Authority on 13 June 2011. Orion is responsible for electricity distribution in Christchurch and the Selwyn District, bounded to the north and south by the Waimakariri and Rakaia Rivers and to the east and west by the Southern Alps and the Pacific Ocean respectively. Within this region, it delivers 3,165 gigawatt-hours of electricity per year to 190,000 customers. History Prior to 1989, electricity distribution and retailing in Christchurch and Selwyn was the responsibility of four entities: the Christchurch City Council Munici ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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