Converter arrangement

A converter apparatus comprising:

• a string of electrically interconnected modules that includes a first group of modules comprising a first module and a second group of modules comprising a second module;
• a first screen connected to a first defined electric potential node and located adjacent the first group of modules;
• a second screen connected to a second defined electric potential node and located adjacent the second group of modules, wherein during operation of the converter apparatus a resonance loop is created from the first module via the first and second screens and the second module back to the first module;
• and
• a damping unit in the resonance loop, the damping unit being set to dampen electromagnetic noise, wherein the damping unit is placed between the first defined potential node and the first screen.

A converter apparatus comprising:

• a string of electrically interconnected modules that includes a first group of modules comprising a first module and a second group of modules comprising a second module;
• a first screen connected to a first defined electric potential node and located adjacent the first group of modules;
• a second screen connected to a second defined electric potential node and located adjacent the second group of modules, wherein during operation of the converter apparatus a resonance loop is created from the first module via the first and second screens and the second module back to the first module;
• and
• a damping unit in the resonance loop, the damping unit being set to dampen electromagnetic noise, wherein the damping unit comprises a resistance.