5. International practices
Here, we present the practices used by various power companies. Two types of defense barrier are used, in line with each power company's defense philosophy, depending on whether it wishes to protect itself from a collapse phenomenon or a specific incident.
5.1 Overloads, cascades of overloads
The protection of lines against overloads is not a phenomenon-based approach in the case of meshed networks. Indeed, it is not possible to assess the risk of overloading using a conventional network parameter. The French and Japanese networks are two of the very few to be equipped with line overload protection. In France, all the lines in the transmission network are equipped with such devices; in Japan, only the main lines are. It should be stressed, however, that this...
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International practices
Need to adapt defense plan to network changes
References
In Techniques de l'Ingénieur. Traité Génie électrique
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