1. A method for identifying a status of switch devices in a distribution network including a plurality of interconnected buses and the switch devices, the method comprising: deriving a probability model for power injections at each of the plurality of interconnected buses, the power injections comprising power consumption and power generation at individual buses, the probability model being derived from historical measurements of power injections; receiving real time sensor measurements of electrical quantities in the distribution network; and selecting, from a plurality of network topologies derived from a plurality of possible statuses of the switch devices, a network topology most likely to produce the real time sensor measurements, the selecting being based on the probability model.