Title :
Real-time monitoring of iron-core and copper losses of transformers Under(Non)Sinusoidal operation
Author :
Lin, Dingsheng ; Fuchs, Ewald F.
Author_Institution :
Univ. of Colorado, Boulder, CO, USA
fDate :
7/1/2006 12:00:00 AM
Abstract :
The online monitoring of iron-core and copper losses of single- and three-phase transformers is important, particularly for transformers feeding nonlinear loads. This paper devises a new digital data acquisition method for the separate online measurement of iron-core and copper losses of three-phase transformers under any full or partial-load conditions. The accuracy requirements of the instruments (voltage and current sensors, voltmeters, and ammeters) employed are addressed. The measurement uncertainties are acceptably low if voltage and current sensors with 0.1%-0.5% accuracy are used.
Keywords :
ammeters; condition monitoring; electric current measurement; electric sensing devices; loss measurement; losses; power transformers; voltage measurement; voltmeters; ammeters; copper losses; current sensors; digital data acquisition method; iron-core losses; nonlinear loads; online measurement; online monitoring; real-time monitoring; single-phase transformers; three-phase transformers; voltage sensors; voltmeters; Ammeters; Copper; Data acquisition; Instruments; Loss measurement; Low voltage; Measurement uncertainty; Monitoring; Phase transformers; Voltmeters; Accuracy; copper losses; dc bias; harmonics; iron-core losses; nonsinusoidal operation; power transformer; real-time monitoring; uncertainty;
Journal_Title :
Power Delivery, IEEE Transactions on
DOI :
10.1109/TPWRD.2006.874118
