Description: In blackout situation, for instance during power line tripping, the power system can easily exhibit a dynamic behaviour, which comes up with superimposed oscillations at special frequencies. This system dynamics may lead to a collapse, when critical point, called Hopf-point, has been passed by. Blackouts, like those in New York and other collapse events in electrical power systems can comprehensively be explained by the theories of nonlinear dynamics, bifurcations and deterministic chaos. The CPR-D Collapse Predication Relay is continually measuring the exact frequently lapse in the power net. The results of these measurements play the role of the sensory input for the permanent surveillance and assessment of the system dynamics. If a dangerous situation is to be detected the power system carrying company will immediately receive an alert message. This may initiate decisions of the operators to switch out the transformers by the regulating device to avoid further damage.
