PUBLIC
Abstract Cable Over Voltage for MMC based VSC HVDC System Interaction with Converters
English
In this paper we do not claim an investigation of the highest of all possible overvoltages, instead we focus on an important case in the ongoing discussion, which is an overvoltage type occurring in a symmetrical monopolar HVDC system. Symmetrical monopolar HVDC systems are today among the most common installed system topologies. In the presented case a +/-320 kV dc system is studied, where two MMC VSC stations are connected via 225 km long sea cable. Parameter variations, such as fault location, location of occurring overvoltage and cable length, are investigated on a specific basis, and tendency of their impact is presented.