Abstract：In order to overcome the limitations of the traditional self-throwing device only adapted to specific operating modes, to ensure continuous power supply, proposed a regional automatic switchover system. The system can adapt to the maximum changes of grid operation mode, which is beneficial to improve the ability of grid to deal with accidents and improve the reliability of power supply. In order to solve the problem of overload of line and overload of transformer after the operation of the system, the correction model of power grid control strategy is added to the system, and two correction schemes for line overload and transformer overload are set up before execution of all the operation strategies. In order to ensure the accuracy and reliability of the system action strategy and eliminate the damage caused by overloading problems, the strategy which may cause the static security limit of the power grid will be revised to ensure the reliability of the power supply in the regional power grid. Engineering applications show the accuracy of the system against overload problems.
2019, Vol. 20 
