A control scheme for islanded and grid-connected DC microgrids
Mokhtar, Mohamed; Mostafa Ibrahim Mohamed Marei; El-Sattar, Ahmed A.;
Abstract
DC microgrids can be operated either in the islanded mode or the grid-connected mode. The droop technique is widely used to control dc microgrids in both modes. The voltage deviation and the current sharing error are the main problems associated with the droop technique. This paper presents a control system for both islanded and grid-connected dc microgrids. The droop method is used to control each converter in dc microgrid to share the required power depending on its rating. The secondary loop is used to solve the problems associated with the voltage deviation in islanded mode, while in grid-connected mode, the tertiary controller is used to control the supplied power from dc microgrid to the main grid. The current sharing loop is used to improve the accuracy of power sharing between all converters in both modes, where the droop resistance of each converter in dc microgrid is updated continuously based on the current sharing error. The dynamic performance of the proposed control system for dc microgrid is numerically evaluated under different modes of operations.
Other data
Title | A control scheme for islanded and grid-connected DC microgrids | Authors | Mokhtar, Mohamed; Mostafa Ibrahim Mohamed Marei ; El-Sattar, Ahmed A. | Keywords | DC microgrid;Droop technique;grid-connected mode;islanded mode | Issue Date | 22-Feb-2018 | Conference | 2017 19th International Middle-East Power Systems Conference, MEPCON 2017 - Proceedings | ISBN | 9781538609903 | DOI | 10.1109/MEPCON.2017.8301181 | Scopus ID | 2-s2.0-85047496161 |
Recommend this item
Similar Items from Core Recommender Database
Items in Ain Shams Scholar are protected by copyright, with all rights reserved, unless otherwise indicated.