Title Power quality services provided by virtually synchronous facts
Authors Tarraso A., LAI, NGOC BAO, BALTAS, NICHOLAS-GREGORY, RODRÍGUEZ CORTÉS, PEDRO, RODRÍGUEZ CORTÉS, PEDRO, BALTAS, NICHOLAS-GREGORY, LAI, NGOC BAO
External publication No
Means Energies
Scope Article
Nature Científica
JCR Quartile 3
SJR Quartile 1
JCR Impact 2.70200
Area International
Web https://www.scopus.com/inward/record.uri?eid=2-s2.0-85071555484&doi=10.3390%2fen12173292&partnerID=40&md5=387cee1fef512751acca7fd82505e69a
Publication date 01/01/2019
ISI 000486860500089
Scopus Id 2-s2.0-85071555484
DOI 10.3390/en12173292
Abstract The variable and unpredictable behavior of renewable energies impacts the performance of power systems negatively, threatening their stability and hindering their efficient operation. Flexible ac transmission systems (FACTS) devices are able to emulate the connection of parallel and series impedances in the transmission system, which improves the regulation of power systems with a high share of renewables, avoiding congestions, enhancing their response in front of contingencies and, in summary, increasing their utilization and reliability. Proper control of voltage and current under distorted and unbalanced transient grid conditions is one of the most critical issues in the control of FACTS devices to emulate such apparent impedances. This paper describes how the synchronous power controller (SPC) can be used to implement virtually synchronous FACTS. It presents the SPC functionalities, emphasizing in particular the importance of virtual admittance emulation by FACTS devices in order to control transient unbalanced currents during faults and attenuate harmonics. Finally, the results demonstrate the effectiveness of SPC-based FACTS devices in improving power quality of electrical networks. This is a result of their contribution to voltage balancing at point of connection during asymmetrical faults and the improvement of grid voltage quality by controlling harmonics flow. © 2019 by the authors.
Keywords Balancing; Controllers; Harmonic analysis; Power control; Power quality; Quality control; Electrical networks; Flexible AC transmission systems devices; Harmonics; Power controllers; Synchronous machi
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