Oblon, McClelland, Maier & Neustadt, L.L.P.
Power switching control apparatus for switching timings of breaker to suppress transit voltage and current upon turning on the breaker
A target pole-close timing determining unit corrects a breaker characteristic correction signal of a preceding turn-on phase by using a correction amount which is proportional to an absolute value of the interpolar voltage upon turn-on of the proceeding turn-on phase, and a correction amount which is proportional to an elapsed time after a target pole-close timing of the preceding turn-on phase, to generate a subsequent phase interpolar voltage signal, and determines a target pole-close timing of the subsequent turn-on phase at a timing when the subsequent phase interpolar voltage signal is equal to or smaller than a threshold value.
Mitsubishi Electric Corporation
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inventional inventional inventional
Tomohito Daigo Takashi Aya Shoichi Kenji
Mori Matsumoto Shindoi Yamamoto Kobayashi Inomata