Measurement of three-phase transformer derating and reactive power demand under nonlinear loading conditions |
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Authors: | Fuchs E.F. Dingsheng Lin Martynaitis J. |
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Affiliation: | Univ. of Colorado, Boulder, CO, USA; |
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Abstract: | The measurement of real and apparent power derating of three-phase transformers is important for transformers feeding nonlinear loads. This paper presents a new digital data-acquisition method for measuring derating and reactive power demand of three-phase transformers under full or partial load conditions. The accuracy requirements of the instruments employed (potential, current transformers, shunts, voltage dividers, optocouplers volt- and current meters) are addressed. Application examples demonstrate the usefulness of this new digital data-acquisition method. |
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