Cable Overvoltage for Mmc Based Vsc Hvdc System: Interaction with Converters

MMC (Modular Multilevel Converter) type Voltage Source Converter (VSC) based High Voltage Direct Current (HVDC) transmission system often uses cables as DC power transmission medium. One potential challenge faced by the cable system is new type of OVs (overvoltages) occurring in the dc cable due to faults in the HVDC system depending on system topology and converter design. The cable generally needs to be designed to withstand the voltage occurring during a fault, which makes it important to find the highest possible OV appearing in the cable of various transmission system designs.