发明名称 |
INRUSH-CURRENT SUPPRESSING DEVICE AND INRUSH-CURRENT SUPPRESSING METHOD |
摘要 |
An inrush-current suppressing device includes: a residual-magnetic-flux calculating unit that calculates a residual magnetic flux in a reference phase of a three-phase transformer while assuming a maximum magnetic flux level generated at a time of applying a rated voltage as 1 PU based on a measurement result of a transformer-voltage measuring unit before and after opening a three-phase circuit breaker; a stationary-magnetic-flux calculating unit that calculates a stationary magnetic flux in the reference phase of the three-phase transformer with reference to the maximum magnetic flux level obtained as the 1 PU based on a measurement result of a power-supply-voltage measuring unit, in response to a closing command to the three-phase circuit breaker; and a control unit that actuates a switch of the three-phase circuit breaker corresponding to the reference phase at a timing when the stationary magnetic flux and the residual magnetic flux in the reference phase match each other. |
申请公布号 |
US2012236443(A1) |
申请公布日期 |
2012.09.20 |
申请号 |
US201013509806 |
申请日期 |
2010.01.13 |
申请人 |
KINOSHITA SADAYUKI;KAMEI KENJI;MORI TOMOHITO;MITSUBISHI ELECTRIC CORPORATION |
发明人 |
KINOSHITA SADAYUKI;KAMEI KENJI;MORI TOMOHITO |
分类号 |
H02H7/04 |
主分类号 |
H02H7/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|