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A closed-loop quasi-optical dynamic braking resistor and shunt reactor control strategy for transient stability (of synchronous generators)

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2 Author(s)
Rahim, A.H.M.A. ; Dept. of Electr. Eng., Univ. of Pet. & Miner., Dhahran, Saudi Arabia ; Alamgir, D.A.H.

A control strategy for dynamic braking resistor and shunt reactor is proposed for stabilization of electric generators subjected to large disturbances. The time optimal control is derived as a function of synchronous machine power, its rotor angular position, and speed deviation. The response for a single-machine system with the proposed control has been obtained using the steepest-descent method. The strategy has also been tested on two multimachine systems. Results indicate that the proposed strategy provides a simple and effective method of stabilization under transient emergency conditions. It is found that the strategy is very effective in controlling first swing instability.<>

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Power Systems, IEEE Transactions on  (Volume:3 ,  Issue: 3 )