POWER SWITCHING CONTROL DEVICE AND CLOSING CONTROL METHOD THEREOF

摘要

The objective of the present invention is to obtain: a power switching control device that is able to suppress the occurrence of transient voltage/current that can occur stemming from fluctuations in load-side voltage after current interruption. An estimated breaker interpolar voltage value at/after the current point in time is calculated on the basis of an estimated power-source-side voltage value and an estimated load-side voltage value at/after the current point in time; the target closing time point region from a closing-controllable time point until a closing-control-limit time point during which a breaker can be introduced at a timing such that the absolute value of the estimated breaker interpolar voltage value falls within a preset allowable range is calculated on the basis of the estimated breaker interpolar voltage value; and in the case of a follow-on introduction phase at/after a second introduction phase, the closing-controllable time point is delayed by a preset delay time.