Performance comparision of integrated AC/DC power flow calculation methodologies

Recently, with the advent of power electronics, the use of DC technology might be an attractive option to be considered for energy transmission and distribution in power systems. DC technology offers advantages such as lower losses and higher controllability when compared to conventional AC transmission systems. Moreover, the use of voltage source converters (VSCs) offers the possibility to control active and reactive power independently in the AC grid, giving additional degrees of freedom to the system. In order to verify the operation of the power system power flow calculations are required. Conventional power flow methodologies do not consider DC grids and the controllability offered by them. In this sense, in this paper two novel integrated AC/DC power flow calculation methodologies (unified and sequential) are analyzed and then tested. Results show performance of both methodologies.