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method of symmetrical components

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  • Symmetrical components — In electrical engineering, the method of Symmetrical components is used to simplify analysis of unbalanced three phase power systems.DescriptionCharles Legeyt Fortescue in a paper presented in 1918 ( Method of Symmetrical Co Ordinates Applied to… …   Wikipedia

  • Dqo transformation — Odq redirects here. For the professional association, see ODQ. Additional information needed In electrical engineering, direct–quadrature–zero (or dq0 or dqo) transformation or zero–direct–quadrature (or 0dq or odq) transformation is a… …   Wikipedia

  • One-line diagram — A typical one line diagram with annotated power flows. Red boxes represent circuit breakers, grey lines represent three phase bus and interconnecting conductors, the orange circle represents an electric generator, the green spiral is an inductor …   Wikipedia

  • Two-phase electric power — Two phase electrical power was an early 20th century polyphase alternating current electric power distribution system. Two circuits were used, with voltage phases differing by 90 degrees. Usually circuits used four wires, two for each phase. Less …   Wikipedia

  • List of University of Texas at Austin faculty — This list of University of Texas at Austin faculty includes current and former instructors and administrators of The University of Texas at Austin (UT Austin), a major research university located in Austin, Texas that is the flagship institution… …   Wikipedia

  • Charles Legeyt Fortescue — (1876–1936) was an electrical engineer. He was born in York Factory, in what is now Manitoba where the Hayes River enters Hudson Bay. He was the son of a Hudson s Bay Company fur trading factor and was among the first graduates of the Queen s… …   Wikipedia

  • Asymmetric fault — In power engineering, specifically three phase power, an asymmetric or unbalanced fault is a fault which does not affect each of the three phases equally. This is in contrast to a symmetric fault, where each of the phases is affected equally. In… …   Wikipedia

  • Alternating current — (green curve). The horizontal axis measures time; the vertical, current or voltage. In alternating current (AC, also ac) the movement of electric charge periodically reverses direction. In direct current (DC, also dc), the flow of electric charge …   Wikipedia

  • Nobel Prizes — ▪ 2009 Introduction Prize for Peace       The 2008 Nobel Prize for Peace was awarded to Martti Ahtisaari, former president (1994–2000) of Finland, for his work over more than 30 years in settling international disputes, many involving ethnic,… …   Universalium

  • Life Sciences — ▪ 2009 Introduction Zoology       In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …   Universalium

  • Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics       Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity.       Computer scientist Manindra Agrawal of the… …   Universalium

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