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A fuzzy logic controlled braking resistor scheme for stabilization of synchronous generator

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4 Author(s)
Ali, Mohd.H. ; Dept. of Electr. & Electron. Eng., Kitami Inst. of Technol., Hokkaido, Japan ; Soma, Y. ; Murata, T. ; Tamura, J.

Following a major disturbance, each synchronous generator connected to a power system experiences a net difference between its mechanical power input and electrical power output which leads to instability of the system. This paper deals with the investigations regarding the transient stability enhancement of a synchronous generator making use of a fuzzy logic controlled braking resistor scheme. Following a fault, variable rotor speed of the generator is measured and the firing-angle for the thyristor switch is determined from the crispy output of the fuzzy controller. By controlling the firing-angle, braking resistor can control the accelerating power in generator and thus improves the transient stability. The effectiveness of the proposed controller has been demonstrated by considering balanced (3LG: three-phase-to-ground) faults near the generator. Simulation results clearly indicate that the proposed fuzzy control strategy provides a simple and effective method of transient stability enhancement of synchronous generator

Published in:

Electric Machines and Drives Conference, 2001. IEMDC 2001. IEEE International

Date of Conference:

2001

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