In the initial stage of HVDC construction

the large receiving end power grid needs to be equipped with large scale stable control load shedding system. In order to ensure the load can be cut off in extreme cases

the method of withdrawing the automatic bus transfer equipment of the terminal station or blocking automatic bus transfer in emergency will greatly reduce the power supply reliability of the stations concerned. Aiming at the problem of exiting or blocking automatic bus transfer equipment under large power network stability control strategy

this paper presents a remote blocking scheme of automatic bus transfer based on dispatching master station strategy by studying the characteristics of reserve automatic switch-in system and reserve automatic switch-in device. A logic control module based on the energy management system（EMS） is developed to realize the total function platen of load terminal substation remote batch blocking automatic bus transfer in dispatch master after the operation of the control system to ensure power supply reliability and safety coordination. The test results of Changsha power grid show that the method can reliably block automatic bus transfer

and the response time meets the requirements.