Overvoltages Due to Load Rejection on Chute-des-Passes 345-Kv System

This paper describes studies and tests of overvoltages caused by load rejection on a 345-kv hydroelectric system. The tests indicated satisfactory agreement with predicted initial overvoltages. At later times the observed voltages were lower than predicted. The means of protection adopted are described; the tests permitted assessment of this protection and the results are judged to be satisfactory.