Abstract
This paper discusses a different auxiliary source circuit topologies and the introduction of control strategies used for auxiliary source circuit, in favor of bulky electrolytic capacitor replacement in capacitor-supported power electronic systems. DC-BUS capacitor is widely used in grid-tied power converters for power balance, voltage ripple limitation, and short-term energy storage. Auxiliary source circuits are key components to improve the reliability of the dc-links qualitatively, making a great effort to divert the instantaneous pulsating power into extra reliable storage components. Topologies and control strategies of an auxiliary source circuit are comprehensively reviewed in this paper. Additionally, detailed explanation, comparison, and discussion on the auxiliary source circuit are achieved.
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