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Line 3: Five small variable-frequency [[electrical transformer\|transformer]]s 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\|}}) 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].)

Variable-frequency transformer: Difference between revisions