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Analysis of turbine generator steady‐state reactances for load conditions
Author(s) -
Wakui Shin'ichi,
Ide Kazumasa,
Takahashi Miyoshi,
Montoya Gustavo,
Hiyama Futoshi,
Yagi Yasuomi
Publication year - 1998
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/(sici)1520-6416(199805)123:3<73::aid-eej9>3.0.co;2-n
Subject(s) - reactance , flux linkage , stator , control theory (sociology) , permanent magnet synchronous generator , ac power , turbine , synchronous motor , physics , rotor (electric) , magnetic flux , voltage , engineering , magnetic field , electrical engineering , computer science , induction motor , direct torque control , control (management) , quantum mechanics , artificial intelligence , thermodynamics
This paper describes variations of turbine generator steady‐state reactances for load conditions. When the turbine generator is of small size, magnetic saturation of the stator and rotor core is a problem. Therefore, it is important to understand the variations of the reactances for load conditions. The reactances of a 592‐MVA turbine generator are calculated with d‐ and q‐axis equations considering magnetic saturation and two‐dimensional numerical magnetic field analysis. The results are as follows. (1) The equivalent synchronous reactances considering cross‐magnetizing are smaller than the original synchronous reactances for load conditions. (2) Numerical values of the d‐ and q‐axis mutual reactance and the field and q‐axis mutual reactance are at their maximum when the d‐axis linkage flux is nearly equal to the q‐axis linkage flux under constant voltage. (3) The d‐axis synchronous reactance drops with increasing reactive power under constant voltage and active power, but the q‐axis synchronous reactance increases. (4) The variation of the equivalent d‐axis synchronous reactance with increasing reactive power is similar to that of the d‐axis synchronous reactance, but the variation of the equivalent q‐axis synchronous reactance is different from that of the q‐axis synchronous reactance. © 1998 Scripta Technica. Electr Eng Jpn, 123(3): 73–83, 1998