Open AccessNew hybrid‐microgrid topology using a bidirectional interleaved converter as a robust power interface operating in grid‐connected and islanded modes
Author(s) -
Tricarico Thiago,
Gontijo Gustavo F.,
Aredes Mauricio,
Dias Robson,
Guerrero Josep M.
Publication year - 2020
Publication title -
iet renewable power generation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.005
H-Index - 76
ISSN - 1752-1424
DOI - 10.1049/iet-rpg.2019.0626
Subject(s) - microgrid , grid , topology (electrical circuits) , buck converter , control theory (sociology) , computer science , power (physics) , interface (matter) , buck–boost converter , voltage , boost converter , engineering , electronic engineering , electrical engineering , control (management) , physics , geometry , mathematics , bubble , quantum mechanics , maximum bubble pressure method , parallel computing , artificial intelligence
This study presents a new microgrid topology that uses a bidirectional interleaved converter performing a power interface between DC buses in a hybrid microgrid allowing for both grid‐connected and islanded modes. The authors propose a new control strategy and controllers' design method aiming at achieving a high‐performance dynamic response regarding the converter load and generation disturbance rejection capability. In the grid‐connected mode, the interleaved converter operates in the buck mode providing a high‐power‐quality DC microgrid voltage. In the islanded mode, the interleaved converter operates in the boost mode and it is responsible for regulating the DC link of the back‐to‐back converter that connects the main grid to the AC microgrid. A detailed mathematical model is presented to obtain a MIMO system that takes into account the system's disturbances to analyze both stability margins and disturbance‐rejection response. Simulations of the proposed topology are carried out in PSCAD/EMTDC in a microgrid operating in grid‐connected and islanded operation modes. Experimental results are provided in order to validate the proposed control tuning method.