Contribution of HVDC converters to the DC short circuit current

Abstract

This paper deals with the short circuit current contribution of different HVDC converter types at a fault on the DC side. The analysis covers both current source converters (CSC) and voltage source converters (VSC). Bipolar and monopolar configurations are considered. The influence of the AC and DC system parameters (SCR, AC system equipment, DC transmission line length etc.) on the short circuit current is illustrated. The simulation results are verified by short circuit current calculations based on the system configuration.