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In this paper, a preventive control method against transient instabilities due to a set of critical contingencies that could occur in a large power system is proposed. The generation rescheduling, adopted as the preventive control, is based on the coherency between the generators. The rescheduling is done by attempting to bring the generators’ rotor speeds equal after a three phase fault that might...
Due to its specific advantages, the model of probabilistic insecurity index is being applied more and more widely in the security control of power system. Based on the fact that the boundary of DSR can be expressed by hyper plane and the migration law of the hyper plane, lots of emulations on the New England 4-genarator 11-bus system are performed. Through the results of the emulations, it is found...
Based on the dynamic security region, an optimal searching algorithm for emergency control measures was proposed. This algorithm changed the optimal point for generator tripping according to the transformation of unstable modes during the search process, which avoided the influence of negative effect problems caused by generator tripping in the transient stability control. A system with 8 generators...
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