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Editorial cleanups. Needs more work, but definitely a notable subject deserving an article. |
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Five small variable frequency transformers with a total power rate of 25 MVA were in use at [[Neuhof Substation]], Bad Sachsa, Germany for coupling power grids of former East and West Germany between 1985 and 1990.
For instance, the Langlois Substation in [[Québec]], [[Canada]] ({{Coord|45|17|13.76|N|74|0|56.07|W|}}
AEP Texas installed a 100 MW VFT substation in [[Laredo, Texas|Laredo]], Texas, [[United States]] ({{Coord|27|34|13.64|N|99|30|34.98|W|}}) in early 2007. It connects the power systems of [[ERCOT]] (in the United States) to [[Comisión Federal de Electricidad |CFE]] (in Mexico). (See [http://www.ettexas.com/projects/vft.asp The Laredo VFT Project].)
GE installed a 3 x 100 MW VFT substation in Linden, New Jersey, [[United States]] {{Coord|40|38|0.03|N|74|12|46.04|W|}} in 2009. It connects the power systems of PJM & NYISO (in the United States). This installation is in parallel with three existing phase shifting transformers to regulate synchronous power flow. (See http://www.geenergyfinancialservices.com/LindenVFT_Inauguration.asp The Linden VFT Project])▼
▲GE installed a 3
Smaller VFTs are used in large land-based [[wind turbine]]s, so that the turbine rotation speed can vary while connected to a distribution grid.
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==External links==
* [http://www.spectrum.ieee.org/nov07/5714 Power Transmission Without the Power Electronics]
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