Development and Validation of a Comprehensive Synchronous Machine Model for a Real-Time Environment

• Published in: IEEE transactions on energy conversion Vol. 25; no. 1; pp. 34 - 48
• Main Authors: Dehkordi, A.B., Neti, P., Gole, A.M., Maguire, T.L.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-03-2010; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Coils (windings); Computational modeling; Cross magnetization; Digital relays; digital transient network analyzer (DTNA); finite-element analysis; Machine windings; Magnetic analysis; Mathematical analysis; Mathematical models; Poles; Power system harmonics; Power system simulation; Power system transients; Real time; real-time simulation; Reluctance; Saturation; synchronous machine; Synchronous machines; Testing; Transient analysis; winding function
• ISSN: 0885-8969; 1558-0059
• DOI: 10.1109/TEC.2009.2038530

A comprehensive model of a salient-pole synchronous machine is developed for a real-time environment. By obtaining the effective specific permeance of the machine from simple experimental measurements and the exact geometry of the rotor pole arc, a model is developed that includes the exact distribution of windings and operating-point-dependent saturation. This model offers a superior simulated response of the machine for fault transients, as well as for steady-state harmonic behavior, and is suitable for the closed-loop testing of relays and controls. The inductances of the machine are computed using the modified winding function approach and validated using finite-element analysis. Finally, the performance of the model is validated under healthy and faulted conditions by comparison with tests on an actual machine.