Implementation of Simplified Models of Local Controller for Multi-terminal HVDC Systems in DIgSILENT PowerFactory

Abstract

The North Sea has a vast potential for renewable energy generation: offshore wind power, tidal and wave energy. The voltage source converter (VSC) and high voltage direct current (HVDC) systems are more flexible than their AC counterparts. This offers distinct advantages for integrating offshore wind farms to inland grid system. It seems that advances on technologies open the door for VSC- HVDC systems at higher voltage and at higher power range, which is making multi- terminal HVDC (MTDC) system technically feasible. The control system for MTDC consists of a central master controller and local terminal controllers at the site of each converter station. The terminal controllers (outer controllers) are mainly responsible