Premium
Experimental study on harmonics reduction effects of damper windings in a synchronous generator
Author(s) -
Katagi Takeshi,
Matsuki Jun'Ya,
Okada Takao
Publication year - 1996
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.4391170508
Subject(s) - damper , harmonics , electromagnetic coil , armature (electrical engineering) , engineering , control theory (sociology) , electrical engineering , voltage , structural engineering , computer science , control (management) , artificial intelligence
With the recent development of power electronics technology, thyristor‐controlled equipment has largely been introduced to the electric power system. These devices generate harmonics that cause voltage distortion and undesirable effects on the power system components. On the other hand, the damper windings of synchronous generators basically are designed to reduce harmonics as well as to damp out system oscillations. However, up to now, the effects of damper windings on harmonics have not been clarified fully in a quantitative way. In this paper, the results of experimental study on the harmonics reduction effect of damper windings have been presented. A specially designed 6‐kVA generator was connected to an infinite‐bus system to investigate the characteristics of damper windings. A new method to measure induced voltages between damper bars, damper bar currents and air‐gap flux densities in the tested generator was established. By comparing these measurements with and without the presence of damper windings, the effect of damper windings was quantified. Thus the reduction effects of the damper windings on slot ripples and harmonics caused by armature current mmf were investigated and were made clearer than before by the proposed method.