Modelling of neutral point clamped based VSC-HVDC system

This work shows the performance of Voltage Source Converter (VSC) based High Voltage DC (HVDC) transmission system. A 200 MVA, ±100 kV link is modeled between two identical asynchronous AC systems. The system studies are based on three level neutral point clamped (NPC) converters. Current controlled scheme is used for active and reactive power control. One converter is operated in DC voltage control mode, while the other operated in Active and Reactive power (PQ) control mode. The results are carried out in MATLAB software. The smoothness of DC voltages shows the feasibility of the work.