Conference Paper

Simulation of Wound Rotor Synchronous Machine under voltage sags

Electr. Dept. of Eng., Tech. Univ. of Catalonia, Terrassa, Spain
DOI: 10.1109/ISIE.2010.5637895 Conference: Industrial Electronics (ISIE), 2010 IEEE International Symposium on
Source: IEEE Xplore


This paper presents a study of the Wound Rotor Synchronous Machine (SM) stability under voltage sags (dips). Machine behavior has been analyzed by considering different magnitudes (or depths) and duration of the sag. Voltage sags cause speed variations on SM (with possible lost of synchronism), current and torque peaks and hence may cause tripping and equipment damage, which leads to financial losses. Three machines of different nominal power have been modeled and simulated with MATLAB in order to study its behavior under voltage sags. These SM's have been analyzed operating as generator, as motor, and in both cases, working under-excited and overexcited.

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Available from: Pedro Rodriguez, Apr 07, 2015
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    ABSTRACT: A 1000 kW/19 200 rpm wound-rotor synchronous machine has been designed as a draft based on 2-D transient finite-element method (FEM). The magnetic fields distribution, the iron losses, the electromagnetic torque and the terminal characteristics of the prototype machine are investigated in this paper by using 2-D finite element analysis. The d-axis inductance Ld and the q-axis inductance Lq of the sample machine are predicted in analytical models. All studies indicate that the wound-rotor synchronous machine is potential to apply in high speed generator or motor application.
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