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Towards a zero-output impedance UPS system

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2 Author(s)
Boost, M.A. ; Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, Que., Canada ; Ziogas, P.D.

A categorization of loads requiring clean uninterruptible power is provided, a thorough analysis of their effects is given, and presently used partial solutions are examined. The topology of a low-impedance 3-φ high-power inverter stage, designed to alleviate substantially the current difficulties faced by interruptible power supplies (UPSs) when dealing with unbalanced and/or nonlinear loads, is described. On the basis of theoretical and extensive experimental results, it is concluded that the low-output-impedance 3-φ UPS presented performs well under both unbalanced and nonlinear load application

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Industry Applications, IEEE Transactions on  (Volume:25 ,  Issue: 3 )