Improving stability by rapid closing of bus-tie switches

RAPID opening of circuit breakers on faulted lines has been recognized for many years as one of the most effective ways of improving power-system stability. Rapid opening followed by rapid reclosing has been used more recently and gives further improvement in stability if the fault is transitory. Rapid closing of normally open breakers offers yet another means of improving stability — a means which has never been put into practice, so far as the author is aware, but which promises to have a field of usefulness.