US 12,438,363 B2
Method for operating a DC voltage grid and power converter for connecting a DC voltage grid to an AC voltage grid
Alexander Unru, Baunatal (DE)
Assigned to SMA Solar Technology AG, Niestetal (DE)
Filed by SMA Solar Technology AG, Niestetal (DE)
Filed on May 12, 2023, as Appl. No. 18/316,303.
Application 18/316,303 is a continuation of application No. PCT/EP2021/081547, filed on Nov. 12, 2021.
Claims priority of application No. 10 2020 129 917.6 (DE), filed on Nov. 12, 2020.
Prior Publication US 2023/0283069 A1, Sep. 7, 2023
Int. Cl. H02J 1/00 (2006.01); H02M 1/00 (2006.01); H02M 3/04 (2006.01); H02M 7/44 (2006.01)
CPC H02J 1/00 (2013.01) [H02M 1/0009 (2021.05); H02M 3/04 (2013.01); H02M 7/44 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An electrical system comprising
a power converter and a DC/DC converter,
wherein the power converter is configured to transfer power between an AC side of the power converter and a DC side of the power converter,
wherein the power converter comprises a bridge circuit comprising AC terminals connected to the AC side of the power converter via AC relays and comprising DC terminals connected to the DC side of the power converter via circuit breakers,
wherein the DC/DC converter comprises an output side that is configured to couple electrically to the DC side of the power converter, and
wherein the electrical system comprises a measuring circuit or device configured to measure a DC power converter voltage and a DC/DC output voltage present on the output side of the DC/DC converter,
wherein the DC power converter voltage and the DC/DC output voltage are present on opposite sides of the circuit breakers,
wherein the electrical system has a control circuit configured to drive the DC/DC converter such that the DC/DC output voltage is set on the output side of the DC/DC converter, an absolute value of which voltage corresponds to the DC power converter voltage.