Self excitation of induction motors compensated by permanently connected capacitors and recommendations for IEEE Std 141-1993

Date

2000-10-12

Author

Ermiş, Muammer
Cadirci, I
Zenginobuz, G
Tezcan, H

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Self-excitation of induction motors compensated by permanently-connected capacitors is investigated in this paper. Theoretical analyses of self-excitation phenomenon are carried out by using some simplified equivalent circuits, and a hybrid mathematical model in ABC/dq axes, respectively in steady-state, and transient-state. An unusual operating condition about water pumping stations is reported, in which water within the pipeline may drive the motor in the reverse direction at speeds higher than synchronous, when a supply interruption coincides with a check valve failure. In order to prevent the motor from dangerous overvoltages due to self-excitation, it is recommended to connect a simple static protection circuit consisting of a resistor in series with a thyristor switch between any two lines of the motor. Critical resistance boundaries which will lead to loss of excitation, and demagnetisation of the rotor core are determined separately as a function of operating speed. A suitable resistance value chosen in the Safe Design Area constitutes a reliable protection mechanism against self-excitation.

Subject Keywords

Generator, Machine

URI

https://hdl.handle.net/11511/62973

Collections

Graduate School of Natural and Applied Sciences, Conference / Seminar

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Self-excitation of induction motors compensated by permanently connected capacitors and recommendations for IEEE Std 141-1993 Ermiş, Muammer; Cadirci, I; Zenginobuz, G; Tezcan, H (Institute of Electrical and Electronics Engineers (IEEE), 2003-03-01) Self-excitation of induction motors compensated by permanently connected capacitors is investigated in this paper. Theoretical analyses of self, excitation phenomenon are carried out by using some simplified equivalent circuits, and a hybrid mathematical model in ABC/dq axes, respectively, in steady state and transient state. An unusual operating condition about water pumping stations is reported, in which water within the pipeline may drive the motor in the reverse direction at speeds higher than synchrono...
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Citation Formats

M. Ermiş, I. Cadirci, G. Zenginobuz, and H. Tezcan, “Self excitation of induction motors compensated by permanently connected capacitors and recommendations for IEEE Std 141-1993,” 2000, p. 3135, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/62973.