Title Synchronous power control of grid-connected power converters under asymmetrical grid fault
Authors Zhang W., Rocabert J., Candela J.I., RODRÍGUEZ CORTÉS, PEDRO, RODRÍGUEZ CORTÉS, PEDRO
External publication No
Means Energies
Scope Article
Nature Científica
JCR Quartile 2
SJR Quartile 1
JCR Impact 2.67600
SJR Impact 0.67000
Area International
Web https://www.scopus.com/inward/record.uri?eid=2-s2.0-85025173998&doi=10.3390%2fen10070950&partnerID=40&md5=585eb387ebe28f1cddc49fc31220274e
Publication date 01/01/2017
ISI 000406700200121
Scopus Id 2-s2.0-85025173998
DOI 10.3390/en10070950
Abstract Control of grid-connected power converters is continuously developing to meet the grid codes, according to which the generation units should keep connected to the grid and further provide ancillary services, such as voltage and frequency support, negative sequence current injection, inertia emulation, etc. A virtual admittance controller is proposed in this paper for the objective of voltage support under asymmetrical grid faults. By using independent and selective admittances for positive and negative sequence current injection, the unbalanced voltage can be significantly compensated during asymmetrical faults. The controller is based on the generic control framework of the synchronous power controller (SPC), which is able to control a power converter with emulated and improved synchronous generator characteristics. Simulation and experimental results based on two paralleled 100 kW grid-connected power converters demonstrate the controller to be effective in supporting unbalanced voltage sags. © 2017 by the authors.
Keywords Cathodes; Controllers; Electric power transmission networks; Metal ions; Power control; Power converters; Sodium-ion batteries; Generator characteristics; Grid-connected; Negative-sequence currents; P
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