Patent ID: 8200372

Claim:
A method comprising: providing a model for a predetermined location within an electrical power system having therein distributed resources (DR), the model based on known system conditions, the model indicative of first sensed characteristics of the electrical power system at the predetermined location; sensing at the predetermined location characteristics of the electrical power system corresponding to at least some of the first sensed characteristics; determining a status of the electrical power system network indicative of an islanding event in dependence upon sensing and other than in dependence upon other sensed data sensed remotely from the predetermined location; controlling a distributed resource in dependence upon the status; wherein forming the model comprises: providing a set of training events each training event within the set having a known outcome relating to islanding of the distributed resource; executing for each training event at least one of the electrical power system network and a simulation thereof to determine the first characteristics relating to the predetermined location for said training event; storing the first characteristics; and forming the model based on the stored first characteristics wherein the model comprises a decision tree based on the stored characteristics.