A transformerless boost-resonant DC-DC converter with high voltage ratio for MVDC applications

• Published in: 2018 IEEE International Autumn Meeting on Power, Electronics and Computing (ROPEC) pp. 1 - 6
• Main Authors: Anaya-Ruiz, G. A., Moreno-Goytia, E. L., Ugalde-Caballero, L. E., Venegas-Rebollar, V.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01.11.2018
• Subjects: DC-DC converter; HVDC link; MTDC; MVDC; RES
• DOI: 10.1109/ROPEC.2018.8661453

This paper presents a novel electronic transformerless boost-resonant DC-DC converter intended for interconnecting renewable power sources to high or medium voltage DC grids. The proposed DC-DC converter has two inductances, one capacitor and five switches. The resonant converter section is a two element configuration, one resonant inductor and one resonant capacitor, while the boost converter section has a boost inductor. The proposed converter has advantages compared to other converters: 1) has the possibility of connecting in a modular way, in order to increase profits 2) reduced number of components in comparison with the others topologies, 3) the possibility of reach ZVS. This paper discusses a classification ofDC-DC converters topologies and the principles of operation of proposed converter as well as the control, the modular connection, and simulations altogether to probe the effectiveness of the converter. Finally, a case of study of a HVDC link, using the proposed converter as a sending node and a MMC converter as a reception node, is carried out.