Abstract :
[en] In recent years, Hydro-Québec has undertaken a major program to upgrade the reliability of its transmission system. Much effort has been focused on increasing the system's ability to withstand extreme contingencies, usually caused by multiple incidents or the successive tripping of transmission lines. This paper deals with the conception and the control logic of an
undervoltage load shedding scheme aimed at protecting the Hydro-Québec system against long-term voltage instability. Various results showing the impact of the operation of these
automatisms on the system stability are provided in this paper.
Commentary :
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