The modeling multi-terminal VSC-HVDC in power flow calculation using unified methodology

In this paper, a new unified method for power flow calculation in AC grids with embedded multi-terminal HVDC systems based on voltage source converter is proposed. In this method all DC and AC equations are solved simultaneously in the same iteration while there is no need to rely on results obtained from other iterative loops unlike the other methods. The method can be applied for any number of converters, any DC network configuration and any converter loss model. The algorithm is implemented in MATLAB and to validate the results, they are compared to results obtained from the simulation software SIMPOW.