Abstract
The companion-circuit analysis (CCA) methodology allows modeling, representation and simulation of linear and nonlinear electric networks. The models obtained are based on the determination of discrete differential equations through the numerical integration of the trapezoidal rule (TR), which correspond to Norton equivalent discrete models. The solution is obtained by nodal analysis in an LU decomposition process. In general terms, this application is suitable for the study and evaluation of adverse effects of power quality, such as voltage sags/swells, faults, harmonic distortion, among others. The case studies under consideration show the simplicity of the CCA method. The simulation results obtained through the illustrated case studies are validated by the Power Systems Computer Aided Design/Electromagnetic Transients Program including Direct Current (PSCAD/EMTDC®) response.
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