Direct electrical heating arrangement with a power electronic converter

A direct electrical heating power supply comprising:

• a converter comprising at least one AC-DC-AC converter cell, the at least one AC-DC-AC converter cell having an AC-DC section, a DC link and a DC-AC section,
• a first, a second and a third converter AC input, wherein the first converter AC input is connectable to a first secondary winding of a three phase transformer, the second converter AC input is connectable to a second secondary winding of the three phase transformer, and the third converter AC input is connectable to a third secondary winding of the three phase transformer,
• a converter AC output connectable to an electrically conductive pipeline section forming a single phase load for direct electrical heating of the pipeline section,
• wherein the converter is configured to supply AC electric power to the single phase load and to distribute the load equally between the first, the second and the third converter AC inputs,
• wherein an output frequency of the AC electric power is tuned to a reactance of the pipeline section.