Switching-device remaining lifetime diagnosis method and apparatus

摘要

There are provided a switching-device remaining lifetime diagnosis method and a switching-device remaining lifetime diagnosis apparatus, wherein as status amount history data, there are accumulated status amounts related to a deterioration status of a switching device, estimated based on measurement data obtained through measurement of performance characteristics of the switching device; based on the accumulated status amount history data, there are created a plurality of system data pieces in which the status amounts are arranged with the respective abscissas of an elapsed time during an operation period of the switching device, the number of operations of the switching device, an inoperative time of the switching device, and an accumulated operation time of the switching device; based on the created system data pieces, the remaining lifetime of the switching device is estimated.

主权项

1. A switching-device remaining lifetime diagnosis method, comprising:
measuring performance characteristics of an electric power switching device is by a measurement unit to obtain measurement data; estimating a deterioration status of the switching device based on the obtained measurement data; accumulating the estimated deterioration status of the switching device over time as status amount history data of the switching device by a status amount estimation unit; creating, by a remaining lifetime estimation unit, two or more system data pieces, by a remaining lifetime estimation unit, based on the accumulated status amount history data, each of the two or more system data pieces including one of
a first system data piece in which the status amount history data are arranged with the abscissa of at least part of an elapsed time during an operation period of the switching device,a second system data piece in which the status amount history data are arranged with the abscissa of the number of operations of the switching device during the at least part of an elapsed time,a third system data piece in which the status amount history data are arranged with the abscissa of an inoperative time of the switching device during the at least part of an elapsed time, anda fourth system data piece in which the status amount history data are arranged with the abscissa of an accumulated operation time of the switching device during the at least part of an elapsed time; determining which one of the created two or more system data pieces has a strongest correlation between the abscissa of the created system data piece and the corresponding status amounts as an extracted first deterioration tendency of the switching device; calculating a first estimation value of the remaining lifetime of the switching device based on the extracted first deterioration tendency; removing the extracted first deterioration tendency from the created two or more system data pieces; determining which one of the two or more system data pieces from which the first deterioration tendency has been removed has a strongest correlation between the abscissa of the created system data piece and the corresponding status amounts as an extracted second deterioration tendency is of the switching device; calculating a second estimation value of the remaining lifetime of the switching device based on the extracted second deterioration tendency; and determining the remaining lifetime of the switching device based on at least the first estimation value and the second estimation value of the remaining lifetime.