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Nelson River DC Transmission System
The Nelson River DC Transmission System, also known as the Manitoba Bipole, is an electric power transmission system of three high voltage, direct current lines in Manitoba, Canada, operated by Manitoba Hydro as part of the Nelson River Hydroelectric Project. It is now recorded on the list of IEEE Milestones in electrical engineering. Several records have been broken by successive phases of the project, including the largest (and last) mercury-arc valves, the highest DC transmission voltage and the first use of water-cooled thyristor valves in HVDC. The system transfers electric power generated by several hydroelectric power stations along the Nelson River in Northern Manitoba across the wilderness to the populated areas in the south. left, Dorsey Converter Station near Rosser, Manitoba – August, 2005 It includes two rectifier stations, Radisson Converter Station near Gillam at and Henday Converter Station near Sundance at , one inverter station, Dorsey Converter Sta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rosser, Manitoba
Rosser is a rural municipality (RM) in the Canadian province of Manitoba, lying adjacent to the northwest side of Winnipeg and part of the Winnipeg Metro Region. Its population as of the 2016 Census was 1,372. It is situated along Provincial Trunk Highway 6, and Winnipeg's Perimeter Highway. CentrePort Canada lies primarily in the eastern part of the RM, inside the Perimeter Highway. A small portion of Winnipeg James Armstrong Richardson International Airport also lies within the RM of Rosser. Water services are provided by the Cartier Regional Water Cooperative. The CentrePort distribution line serves CentrePort development and the RM of Rosser. Water sourced from the Assiniboine River is treated at Headingley before being sent out thru distribution channels. Near the community of Rosser is the Dorsey Converter Station and the large static inverter plant for the Nelson River Bipole HVDC power transmission project. Communities The following communities lie within the RM: * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of IEEE Milestones
The following timeline tables list the discoveries and inventions in the history of electrical and electronic engineering. History of discoveries timeline History of associated inventions timeline List of IEEE Milestones The following list of the Institute of Electrical and Electronics Engineers (IEEE) milestones represent key historical achievements in electrical and electronic engineering. Prior to 1870 *1745–1746 – Leyden jar capacitor by Ewald Georg von Kleist and Pieter van Musschenbroek * 1751 – Book '' Experiments and Observations on Electricity'' by Benjamin Franklin * 1757–1775 – Benjamin Franklin's Work in London * 1799 – Alessandro Volta's Electrical Battery Invention * 1836 – Nicholas Callan's Pioneering Contributions to Electrical Science and Technology * 1828–1837 – Pavel Schilling's Pioneering Contribution to Practical Telegraphy * 1838 – Demonstration of Practical Telegraphy * 1852 – Electric Fire Alarm System * 1857 – Heinrich Ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Permafrost
Permafrost is ground that continuously remains below 0 °C (32 °F) for two or more years, located on land or under the ocean. Most common in the Northern Hemisphere, around 15% of the Northern Hemisphere or 11% of the global surface is underlain by permafrost, with the total area of around 18 million km2. This includes substantial areas of Alaska, Greenland, Canada and Siberia. It can also be located on mountaintops in the Southern Hemisphere and beneath ice-free areas in the Antarctic. Permafrost does not have to be the first layer that is on the ground. It can be from an inch to several miles deep under the Earth's surface. It frequently occurs in ground ice, but it can also be present in non-porous bedrock. Permafrost is formed from ice holding various types of soil, sand, and rock in combination. Permafrost contains large amounts of biomass and decomposed biomass that has been stored as methane and carbon dioxide, making tundra soil a carbon sink. As global war ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ferranti Effect
In electrical engineering, the Ferranti effect is the increase in voltage occurring at the receiving end of a very long (> 200 km) AC electric power transmission line, relative to the voltage at the sending end, when the load is very small, or no load is connected. It can be stated as a factor, or as a percent increase. It was first observed during the installation of underground cables in Sebastian Ziani de Ferranti's 10,000-volt AC power distribution system in 1887. The capacitive line charging current produces a voltage drop across the line inductance that is in-phase with the sending-end voltage, assuming negligible line resistance. Therefore, both line inductance and capacitance are responsible for this phenomenon. This can be analysed by considering the line as a transmission line where the source impedance is lower than the load impedance (unterminated). The effect is similar to an electrically short version of the quarter-wave impedance transformer, but with smaller voltag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kettle Generating Station
The Kettle Generating Station, also known as Kettle Rapids Generating Station, is a run-of-the-river hydroelectric power station on the Lower Nelson River in Manitoba, Canada. It is located northwest of Gillam. As part of the Nelson River Hydroelectric Project, the power station was completed in 1973 and the last generator commissioned in 1974. It has an installed capacity of and is the second largest power station in Manitoba. Construction on the station began in the spring of 1966 and it was carried out in several phases. First, the power house was constructed after a circular coffer dam was set on the right side of the river. Second, the spillway was built adjacent and to the left of the power house while the river flowed through the power house in the meantime. Once the spillway was complete the entire the river was diverted through it. At this point, the turbines and generators were loaded into the power house and the earth-fill section on the dam's left bank was completed. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sundance, Manitoba
Sundance was a community near the Nelson River in Northern Manitoba that was constructed starting in 1975 to house the workers (and families) of the Limestone Dam project, who were employees of Manitoba Hydro, GE and other companies. Sundance was shut down from November 1978 to early 1985 while the Limestone Generating Station construction was put on temporary hiatus. The town was mostly trailers and portable buildings with an elementary school, grocery store, community centre & a few other small stores. Sundance was de-commissioned in September 1992 at the completion of the Limestone Generating Station Project. Google Maps satellite imagery shows that the town no longer exists and only empty lots and streets remain. The closest towns are Gillam, Thompson, Bird (Indigenous reserve), Fox Lake (Indigenous Reserve), Amery & Churchill, Manitoba. Today it is located within the limits of the very large Town of Gillam, by area the largest "town" in Manitoba. This town is the unoff ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Static Inverter Plant
An HVDC converter station (or simply converter station) is a specialised type of substation which forms the terminal equipment for a high-voltage direct current (HVDC) transmission line.Arrillaga, Jos; High Voltage Direct Current Transmission, second edition, Institution of Electrical Engineers, , 1998. It converts direct current to alternating current or the reverse. In addition to the converter, the station usually contains: * three-phase alternating current switch gear * transformers * capacitors or synchronous condensers for reactive power * filters for harmonic suppression, and * direct current switch gear. Components Converter The converter is usually installed in a building called the valve hall. Early HVDC systems used mercury-arc valves, but since the mid-1970s, solid state devices such as thyristors have been used. Converters using thyristors or mercury-arc valves are known as ''line commutated converters''. In thyristor-based converters, many thyristors are conne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dorsey01 , high school in Baldwin Hills/Crenshaw, Los Angeles, California
{{disambiguation, geo ...
Dorsey may refer to: __NOTOC__ People * Dorsey (surname) * Dorsey (given name) Places United States * Dorsey, Illinois, an unincorporated community * Dorsey, Maryland, an unincorporated community ** Dorsey station, a passenger rail station * Dorsey, Michigan * Dorsey, Mississippi, an unincorporated community * Dorsey, Nebraska, an unincorporated community Elsewhere * Dorsey, County Armagh, a village in Northern Ireland * Dorsey Island, Antarctica Other uses * , a destroyer which served in both world wars * Dorsey Road, part of Maryland Route 103 * Susan Miller Dorsey High School Susan Miller Dorsey High School is a high school located in the Crenshaw, Los Angeles, Crenshaw District of Los Angeles, California. It is a part of the Los Angeles Unified School District. The school serves Baldwin Hills, Los Angeles, California, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northern Manitoba
Northern Manitoba (also known as NorMan or Nor-Man) is a geographic and cultural List of regions of Manitoba, region of the Provinces and Territories of Canada, Canadian province of Manitoba. Originally encompassing a small square around the Red River Colony, the province was extended north to the 60th parallel north, 60th parallel in 1912. The region's specific boundaries vary, as "northern" communities are considered to share certain social and geographic characteristics, regardless of latitude. Geography Different bodies of the Government of Manitoba provide different definitions of Northern Manitoba. The most detailed description is set out by Manitoba Indigenous and Northern Relations: For marketing purposes, Travel Manitoba considers Northern Manitoba to encompass everything north of the 53rd parallel north, 53rd parallel. In contrast, the Look North economic development agency defines the North as consisting of Statistics Canada's Census Divisions 19, 21, 22, and 23. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nelson River
The Nelson River is a river of north-central North America, in the Canadian province of Manitoba. The river drains Lake Winnipeg and runs before it ends in Hudson Bay. Its full length (including the Saskatchewan River and Bow River) is , it has mean discharge of , and has a drainage basin of , of which is in the United States. Geography The Nelson River flows into Playgreen Lake from Lake Winnipeg then flows from two channels into Cross Lake. The east channel and the Jack River flow from the southeast portion of the lake into Little Playgreen Lake then the Nelson east channel continues in a northerly direction passing through Pipestone Lake on its way to Cross Lake. The west channel flows out of the north ends of Playgreen Lake, Kiskittogisu Lake and Kiskitto Lake into Cross Lake at the Manitoba Hydro's Jenpeg Generating Station and Dam. From Cross Lake it flows through Sipiwesk Lake, Split Lake and Stephens Lake on its way to the Hudson Bay. Since it drains Lake Winni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydroelectric
Hydroelectricity, or hydroelectric power, is electricity generated from hydropower (water power). Hydropower supplies one sixth of the world's electricity, almost 4500 TWh in 2020, which is more than all other renewable sources combined and also more than nuclear power. Hydropower can provide large amounts of low-carbon electricity on demand, making it a key element for creating secure and clean electricity supply systems. A hydroelectric power station that has a dam and reservoir is a flexible source, since the amount of electricity produced can be increased or decreased in seconds or minutes in response to varying electricity demand. Once a hydroelectric complex is constructed, it produces no direct waste, and almost always emits considerably less greenhouse gas than fossil fuel-powered energy plants. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thyristor Valve
In an electric power transmission system, a thyristor-controlled reactor (TCR) is a reactance connected in series with a bidirectional thyristor valve. The thyristor valve is phase-controlled, which allows the value of delivered reactive power to be adjusted to meet varying system conditions. Thyristor-controlled reactors can be used for limiting voltage rises on lightly loaded transmission lines. Another device which used to be used for this purpose is a magnetically controlled reactor (MCR), a type of magnetic amplifier otherwise known as a transductor. In parallel with series connected reactance and thyristor valve, there may also be a capacitor bank, which may be permanently connected or which may use mechanical or thyristor switching. The combination is called a static VAR compensator. Circuit diagram A thyristor controlled reactor is usually a three-phase assembly, normally connected in a delta arrangement to provide partial cancellation of harmonics. Often the main TCR ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
