Using Multiple Reference Frame Theory forConsidering Harmonics in Average-ValueModeling of Diode Rectifiers - 2016


Line-commutated converters (LCCs) are widely employed in numerous high-power applications like generator-rectifier systems, exciters, front-end rectifier loads, and classic high voltage dc systems. Among numerous techniques used for modeling LCC systems, the dynamic average price modeling (AVM) whereby the effect of switching is neglected or averaged over a prototypical switching interval has become indispensible since it leads to continuous, linearizable, and computationally economical models. The conventional AVMs can only predict the basic component of the ac voltages and currents, and neglect the harmonics injected at the ac facet by the switching converter. In this paper, a recently proposed parametric average-worth modeling (PAVM) approach is extended using multiple reference frame theory to incorporate the many harmonics of interest (e.g., fifth and seventh) for diode rectifiers. The new PAVM is verified against the detailed simulation in steady-state and transient studies, and is effective in predicting the transient waveforms, while achieving vital computational advantage (speed up) in time-domain simulation over standard models.

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