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Summary An online and non‐model‐based wide area damping controller (WADC) is presented in this paper for damping inter‐area oscillations in the presence of high penetration of renewable energies. For this propose, based on wide area measurement system (WAMS) technology and evaluating the system dynamic behavior within real‐time environment, the oscillating generators against each other are identified from which corresponding global inter‐area controlling signals are provided. The proposed WADC is consisting of three different individual parts including (a) Identifying inter‐area oscillations, (b) Evaluating inter‐area signals, and (c) Estimating controlling signals with respect to reach high damping ratio of inter‐area oscillations. In the first part, based on coherency concept and evaluating global signals gathered from WAMS data, the generators coherency factors and expected inter‐area oscillations are identified. In the case of evaluating an inter‐area oscillation in the second part, the proposed WADC scheme is activated from which the initial damping ratio and candidate generators with high penetration on damping procedure of inter‐area oscillation are determined. Finally, in the third part, the proper gain factors are estimated with respect to each inter‐area signal form which the individual controlling signals for damping inter‐area oscillations are provided. In order to evaluate damping performance, the proposed WADC scheme and corresponding different parts are carried out on modified 39‐bus test system considering different operational and topological conditions with the potential of unstable inter‐area oscillations. Simulation studies indicate the effectiveness of proposed WADC scheme with high penetration for damping inter‐area oscillations.

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