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Power system dynamic modeling involves nonlinear differential and algebraicequations (DAEs). Solving DAEs for large power grid networks by direct implicitnumerical methods could be inefficient in terms of solution time; thus, suchmethods are not preferred when real-time or faster than real-time performanceis sought. Hence, this paper revisits Waveform Relaxation (WR) algorithm, as adistributed computational technique to solve power system dynamic simulations.Case studies performed on the IEEE NE 10-generator 39-bus system demonstratethat, for a certain simulation time window, the solve time for WR method islarger than the length of the simulation window; thus, WR lacks the performanceneeded for real-time simulators, even for a small power network. To achievereal-time performance, then a Windowing technique is applied on top of the WR,for which the solve time was obtained less than the length of a simulationwindow, that shows the effectiveness of the proposed method for real-timedynamic simulation of power systems.

Real-Time Power System Dynamic Simulation using Windowing based Waveform Relaxation Method