NON-LINEAR MODELING AND SIMULATION OF HIGH ORDER RESONANT FILTER - INVERTER SYSTEM IN TRANSIENT AND STEADY STATES

摘要

The paper deals with analysis and modelling of the 4thrnorder LCLC filter supplied from single-phase voltagernsourced inverter considering non-linearity, transient- andrnsteady states. The main goal of the filter is to providernnearly harmonic output voltage with low value of totalrnharmonic distortion. This is presented by PC simulationrnanalysis and by experimental verification.rnTransient analysis of the filter are focused on dangerrnsituation which can occur during normal work operationrnas switch-on and switch-off of the load or filter,rnrespectively. Results of simulation experiments, presentedrnin the paper, show that the value of overshoots of thernvoltages reach can be dangerous for electronic switchesrnused in supplying inverter. Interesting are also the currentrnovershoots caused by non-linearity of the inductor used inrnpower circuit of the filter.