1. A dispatcher training simulating device comprising: an energy management system (EMS) actual measurement data loader configured to load EMS actual measurement data to the dispatcher training simulating device; an EMS actual measurement data initializing unit configured to calculate a power flow by adjusting a generator output in the loaded EMS actual measurement data, and generate initialized EMS actual measurement data based on whether the calculated power flow converges on a predetermined value; and a dispatcher training simulation providing unit configured to provide a dispatcher training simulation based on the initialized EMS actual measurement data.