On-line control strategy switching method for security control device by using strategy effective conditions

The invention discloses an on-line control strategy switching method for a security control device by using strategy effective conditions. Upper and lower power gear limits which reflect a trend mode in an on-line strategy fixed value transmitted by a scheduling end are used as the effective conditions, the on-line strategy fixed value which is received by the device or is used is subjected to effective condition inspection by the security control device according to the running mode of the device, and the device is to work in an on-line strategy fixed value mode or an off-line strategy fixed value mode is determined according to whether the on-line strategy fixed value passes the inspection or not. According to the method, the on-line strategy fixed value is inspected by using the strategy effective conditions, so that the strategy fixed value working mode is reasonably and effectively switched, and the action reliability of the security control device is ensured.