This work studies double electrical faults (at n nodes simultaneously) in electrical networks and concludes the general mathematical model to analyze electrical systems during double faults occurred in electrical power systems using matrix model of the nodes admittance equations, the research work also explains general mathematical model by which symmetric and asymmetric electrical faults for all types of shunt and series faults and doubled faults are calculated (i.e faults occurring simultaneously in more than one node) As well as developing the required calculations algorithm of the investigated systems and propose solution represented in calculating any double electrical fault including its long and wide components altogether at any node using general algorithm without the need to go back to the beginning and loading the program again when the two nodes place of the fault changes, or faults type changes. A general model with matrix formula for equations of symmetric volts components in faults nodes and the ultimate conditions of each fault's type of doubled faults have been set, in order to obtain symmetric components values of faults currents in doubled faults nodes where fault is being studied.
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