METHOD FOR SUPPLYING A DC LOAD, ENERGY CONVERSION SYSTEM AND ELECTROLYSIS SYSTEM

The disclosure is directed to a method for supplying power to a DC load using an energy conversion system that includes first and second rectifiers and a transformer system. Each of the rectifiers contains an AC-DC converter connected to an AC grid via a separate secondary side of the transformer system. The transformer system provides a first AC voltage having a first voltage amplitude Ûon the first secondary side and a second AC voltage having a second voltage amplitude Ûon the second secondary side, wherein a value of the second voltage amplitude Ûexceeds a corresponding value of the first voltage amplitude Û. The method includes operating the first rectifier with a first non-zero power flow Pto supply power to the DC load when an input voltage Uat the input of the DC load falls below a voltage threshold value U: wherein a second power flow Pthrough the second rectifier is suppressed, and operating the second rectifier with a second non-zero power flow Pto supply power to the DC load when the input voltage Uat the input of the DC load reaches or exceeds the voltage threshold value U. The application likewise discloses an energy conversion system for performing the method and an electrolysis system.