Variable-frequency transformer: Difference between revisions

Revision as of 14:09, 11 April 2014

Revision as of 12:09, 23 April 2014

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Langlois Substation in [[Québec]], [[Canada]] ({{Coord|45|17|13.76|N|74|0|56.07|W|}}) installed a 100 MW variable-frequency transformer in 2004 to connect the asynchronous grids in Québec and the [[northeastern United States]].

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].)

Smaller VFTs are used in large land-based [[wind turbine]]s, so that the turbine rotation speed can vary while connected to an [[electrical distribution]] grid.

==Linden VFT==

[[General Electric]] installed a 3 × 100 MW VFT substation in [[Linden, New Jersey]], in the United States in 2009. It connects the power systems of [[PJM Interconnection|PJM]] & New York Independent System Operator (NYISO). This installation is in parallel with three existing phase-shifting transformers to regulate synchronous power flow.<ref>{{cite web |url=http://geenergyfinancialservices.com/press_releases/view/140 |title=GE to Offer Additional Electric Transmission Capacity from its Smart Grid Transformers at New Jersey Power Plant |author=<!--Staff writer(s); no by-line.--> |date=11Dec201211 Dec 2012 |website=GE Energy Financial Services Press Release |accessdate=07Apr20147 Apr 2014}}</ref>

==Economics of energy trading==