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Critical-cluster identification in transient stability studies [of power systems]

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2 Author(s)
Xue, Y. ; Inst. Montefiore, Liege Univ., Belgium ; Pavella, M.

A method is proposed for identifying the critical cluster of machines, i.e. the machines responsible for loss of synchronism in a power system following a large disturbance. It is based on the conjecture that the loss of synchronism condition can be recognised by, first, considering `near-critically cleared trajectories' of the machines and, secondly, observing how they are organised near the system's unstable equilibrium point. Examples are given using the IEEE test system to illustrate the essential features: reliability in correctly identifying the critical clusters; robustness with respect to its capacity to do so under very stringent conditions; and effectiveness concerning its ability to identify automatically critical clusters of any size, i.e. irrespective of the number of machines that they contain

Published in:

Generation, Transmission and Distribution, IEE Proceedings C  (Volume:140 ,  Issue: 6 )