Method for operating an electrolysis system, related controller, power supply and electrolyzer system

Abstract

An electrolysis system has an electrolyzer, an on-load tap changing transformer, and at least two line-commutated converters, preferably IGBT converters. The on-load tap changing transformer receives an electrical power from an electrical power source and provides an electrical power output to the line-commutated converters. The line-commutated converters are electrically connected in parallel between the on-load tap changing transformer on a AC side and an electrolyzer on a DC side and convert the electrical power output into an electrical power input for the electrolyzer. The converters are connected to the same transformer AC bus. In a ramping phase of the electrolyzer a voltage of the power input is adjusted by only one of the parallel-connected converters to a tap changing voltage and the other converter stays in a stand-by mode. There are also described power supply, a controller, computer program and a related electrolyzer system.

Dependencies are inferred from the claim text.