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AssigneeSMA Solar Technology AG
InventorsAlexander Unru, Marcel Kratochvil, Burkard Müller
Estimating the term…
A power converter between an AC side and DC of the power converter is disclosed. The AC side is connected to an AC supply grid and the DC side is connected to a DC grid. The power converter includes a bridge circuit connected to the AC side of the power converter via AC switches and connected to the DC side of the power converter via circuit breakers, wherein a DC link circuit of the power converter is chargeable from the AC supply grid via an AC precharging circuit. The power converter has an insulation monitor to measure the insulation resistance of the DC side when the AC precharging circuit is connected to the DC link circuit. The disclosure also includes a related method.
A power converter for transferring power between an AC side of the power converter and a DC side of the power converter, wherein the AC side of the power converter is connected to a grounded three-phase AC supply grid and the DC side of the power converter is connected to an ungrounded DC grid, wherein the power converter comprises a bridge circuit having AC terminals connected to the AC side of the power converter via AC switches and the bridge circuit having DC terminals connected to the DC side of the power converter via circuit breakers,
A method for supplying power to an ungrounded DC grid from a grounded three-phase AC supply grid using a transformerless power converter comprising a bridge circuit DC terminals of which are connected to the DC grid by way of circuit breakers and AC terminals of which are connected to the AC supply grid via AC switches, and comprising a galvanically isolating AC precharging circuit configured to precharge a DC link circuit of the transformerless power converter from the AC supply grid, wherein the method comprises:
Dependencies are inferred from the claim text.