Title :
Analysis of sudden unbalanced short circuits in synchronous machines by applying the principle of harmonic balance
Author :
Weiming, Ma ; Junzhong, Sun ; Gaifan, Zhang ; Xusheng, Wu
Author_Institution :
Naval Univ. of Eng., Wuhan, China
Abstract :
The fundamental idea of the principle of harmonic balance is introduced; the simplified flux-linkage and voltage equations of 3-phase synchronous machines were obtained by means of some necessary assumptions; then by applying the principle of harmonic balance, the sudden line-to-line unbalanced short circuit of 3-phase synchronous machines were analyzed concisely, the magnitudes of the odd and even harmonics of short-circuit currents and their time constants of decay were gained at the same time. The method can also be used in the analysis of unbalanced short circuits of 6-phase and other multiphase machines
Keywords :
harmonic analysis; machine theory; short-circuit currents; synchronous machines; 3-phase synchronous machines; 6-phase machines; even harmonics magnitude; flux-linkage; harmonic balance; line-to-line unbalanced short circuit; multiphase machines; odd harmonics magnitude; short-circuit current harmonics; time constants; voltage equations; Circuit analysis; Circuit faults; DC generators; Differential algebraic equations; Harmonic analysis; Power generation; Stator windings; Sun; Synchronous machines; Voltage;
Conference_Titel :
Electrical Machines and Systems, 2001. ICEMS 2001. Proceedings of the Fifth International Conference on
Conference_Location :
Shenyang
Print_ISBN :
7-5062-5115-9
DOI :
10.1109/ICEMS.2001.970696
