Power converter system and method for operating power converter system for reducing losses in dc link of the power converter system

A power converter system comprising:

• one or more input converters with an input converter topology;
• one or more output converters with an output converter topology;
• a DC link comprising one or more energy storages, wherein the DC link is connected between the one or more input converters and the one or more output converters;
• and
• a controller configured to control the one or more output converters to produce one or more output waveforms with an output frequency and an output angle, and to determine an input frequency and an input angle of the one or more input converters,
• wherein the controller is configured to adjust an operating point, defined by the output frequency and the output angle, to minimize operation at one or more predefined undesirable operating point ranges for reducing losses in the DC link, wherein the one or more predefined undesirable operating point ranges are determined based on:
• the input converter topology,
• the output converter topology,
• an angle difference between the output angle and the input angle, and
• a frequency difference between the output frequency and the input frequency.