1. A method for performing a real-time, in-the-field switching-sequence simulation for a power system that includes a plurality of switching devices, comprising: receiving a request, from a user at a handheld device, to perform an operation on a switching device in the power system; in response to the request, identifying the switching device from the plurality of switching devices; obtaining instant status information associated with the plurality of switching devices; and running a simulation, at the hand-held device, based on the instant status information and the identified switch device; and determining whether the operation is allowed based on an outcome of the simulation.