Use of DC/DC converters modeled as AC-DC converters in HVDC Grids

Due to the growing concern about the lack of traditional energy resources and environmental problems, renewable energies have received great prominence from researchers around the world. One of the possibilities for continuity of supply is through the integration of these sources and through direct current transmission (HVDC). This work analyzes the inclusion of DC-DC converters modeled as an AC-DC converter in direct current electricity transmission systems. They were implemented in the computational tool PSCAD (TM)/ EMTDC (TM) in a permanent and transient situation (short circuit on the DC side). It was found that the proposed model for DC-DC converters resulted in a stable behavior for the analyzed DC network.