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Locating The Source of Forced Oscillation in Power Systems using System Oscillating Energy

The energy dissipation at the generator terminal is used to propose a technique to locate the source of forced oscillations in power systems. In the proposed technique, the network and the load dynamics are incorporated to accurately identify the source of the disturbance. It is also proved mathematically that the dissipating energy for the dominant natural mode of oscillation of a generator is related to damping parameter of that mode i.e. the real part of the eigenvalue of the linearized power system. The technique successfully locates all source of disturbance even when multiple sources of disturbance are applied at different times and durations. The impact of the damping of the electromechanical modes on the forced oscillations has been discussed and its effect on the proposed method of locating the disturbance is investigated. The method has been validated using simulations from various multimachine test systems containing single and multiple sources of forced oscillations.