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Fast steady-state technique for harmonic analysis

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2 Author(s)
Usaola, J. ; Dept de Ingenieria Electrica, Univ. Politecnica de Madrid, Spain ; Mayordomo, J.G.

The authors describe an alternative method for harmonic analysis in electric networks. The steady state solution is found in the time domain using an interactive Newton algorithm, and a Fourier analysis is applied on the magnitudes of interest. The search for the steady state solution is as follows: first, one or several cycles are simulated in the time domain beginning from arbitrary initial conditions; then, the periodicity condition is checked. If it is not satisfied, the Newton algorithm is applied, and new initial conditions are found, from which a new period of integration begins. After several iterations, steady state initial conditions should be found and steady state waveforms obtained. Finally, a Fourier analysis is carried out and the harmonic spectra of the variables of interest calculated. This method has been implemented in the program FASST

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Power Delivery, IEEE Transactions on  (Volume:6 ,  Issue: 4 )