Title :
Potential for loss reductions in transformers through utilization of third-harmonic flux
Author :
Hsu, John S. ; Woodson, Herbert H. ; Liou, Shy-Shenq P.
Author_Institution :
Center for Energy Studies, Texas Univ., Austin, TX, USA
Abstract :
The reductions of core loss and excitation current in transformers by the use of third-harmonic flux are introduced through a three-phase transformer consisting of three single-phase transformers. Primary and secondary line voltages remain sinusoidal. Under the same core loss, fundamental flux density can be increased. Experimental results conducted with third-harmonic filters as well as with harmonic-flux injection are studied. The feasibility of loss reductions in three-phase core and shell types and in single-phase transformers is briefly discussed.<>
Keywords :
harmonics; losses; power transformers; core loss reduction; excitation current reduction; fundamental flux density; harmonic-flux injection; loss reductions; single-phase; third-harmonic filters; third-harmonic flux; three-phase; transformers; Core loss; Filters; Phase transformers; Transformer cores;
Conference_Titel :
Industry Applications Society Annual Meeting, 1988., Conference Record of the 1988 IEEE
Conference_Location :
Pittsburgh, PA, USA
DOI :
10.1109/IAS.1988.25248