The operation of electrical networks constantly face contingencies such as generation outages and line faults. When a network is running under high stress lev-els or a transient fault occurs, the network might undergo angle instability. As a result, the network splits into sev-eral islands causing great loss of load and generation thus, creating network instability and a potential blackout. In this paper Center of Inertia (COI) as well as each area is used for the detection of network instability where the rotor angle stability of the entire network is monitored to estab-lish if and when the network becomes unstable. The method is implemented on the IEEE 39-bus system known as the 10-machine New-England Power System.

EB00000002102K

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