Comparative investigation on power grid perturbations caused by DC-link converters and matrix converters

Abstract

In recent years, the matrix converter has been discussed as a competitive alternative to the state-of-the-art DC-link converter. The matrix converter is considered to be superior due to the absent DC-link capacitor and therefore being fully integrable in silicon. Several publications deal with comparative views on power losses, efforts for realization or control strategies for both converter types. But the comparative study of the power grid's perturbation is a further viewpoint which has to be considered since both converters have to comply to electromagnetic compatibility standards. Therefore both converters are modeled with generic assumptions made on the switching functions and the modulation strategy to ensure a fair-handed basis of comparison. For both converters the spectrum influencing factors are identified and discussed.