Nonlinear Loads Parameters Estimation and Modeling

This paper describes the study and development of two estimation methods for the values of electrical components concerning the input rectifier present in most of the electronic equipments available in the market. Through these methods, it is possible to identify the values of the EMI filter parasitic inductance, the input filtering capacitance Ccc, and the equivalent load connected to the rectifier. This study will be performed from the analysis of the voltage and current waveforms obtained from an oscilloscope in the input of the equipment under measure. The resulting data will be processed through a mathematical analysis in the time domain. This process will permit the subsequent analysis, modeling and simulation of the complex electrical systems in time domain employing commercial simulators like PSIM, Matlab and ORCAD aiming essentially the study of the influence of these loads over the mains harmonic distortion and power quality.