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VSG-controlled parallel-connected voltage-source converters in low-voltage microgrid with dominant resistive impedance.
- Source :
- Journal of Engineering; Apr2024, Vol. 2024 Issue 4, p1-14, 14p
- Publication Year :
- 2024
-
Abstract
- This paper deals with the control and performance improvement of parallel-operated voltage-source inverters (VSIs) controlled as virtual synchronous generators (VSGs). In publications regarding the parallel-operated VSGs, transmission lines are considered to be mainly inductive. However, less analytical works have been done regarding the control of paralleled VSGs in low-voltage grids with dominant resistive impedances. Once VSIs are controlled as VSGs in a microgrid with more resistive transmission lines, swing equation and system representation for the power-angle synchronization will change leading to a new control structure. Therefore, this paper deals with the control of parallel-operated converter-based VSGs in low-voltage grids with dominant resistive line impedances. In this way, the VSG representation, comprising the swing equation and V-P droop characteristic, for applications in highly resistive microgrids is presented, in which the swing equation and VSG frequency are related to reactive power. Then, the V-P droop characteristic is modified and an enhanced P-V droop characteristic for proper sharing of active power between the VSGs in highly resistive microgrids is proposed. Next, the VSG control is modified so that the R/X ratio at the VSG output increases and thus the decoupled control of active/reactive powers in relatively inductive cases is realized as well. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20513305
- Volume :
- 2024
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Journal of Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 177682679
- Full Text :
- https://doi.org/10.1049/tje2.12379