Power converter

A power converters comprising:

• a series transformer having a primary winding connected in series with a line and having a secondary winding;
• multiple array transformers having respective primary and secondary windings, the primary windings being connected in series and to the secondary winding of the series transformer;
• normally-on switches respectively connected in series with corresponding ends of each of the primary windings of the array transformers;
• normally-off current bypass devices respectively connected in parallel with the corresponding series connections of each of the primary windings of the array transformers and the switches connected to the ends of the primary winding of the corresponding array transformer;
• AC-DC converter units, each AC-DC converter unit having an AC side connected to the secondary winding of one of the array transformers;
• and
• mutually independent DC circuits respectively connected to a DC side of one of the AC-DC converter units, wherein, by turning on the current bypass device of the primary winding of a specific array transformer and turning off the switches at the ends of the primary winding of the specific array transformer, the specific array transformer and the AC-DC converter unit connected to the specific array transformer are isolated.