Projekter pr. år
Abstract
This paper proposes a novel control strategy for the two-stage three-phase Photovoltaic (PV) systems to improve the operation under unbalanced grid faults. In case that a three-phase power converter operates under unbalanced grid voltage faults, power related issues, including injected currents, active and reactive power can be negatively affected. In grid-connected systems, the unbalanced faults may lead to Double Grid Frequency (DGF) oscillations of active and/or reactive power or injection of non-sinusoidal three-phase currents. The DGF oscillations of the injected active power can cause similar variations in the dc-link voltage of conventional two-stage PV inverters. In such systems with an electrolytic capacitor in the dc-link, the oscillations of the dc-link voltage with DGF can deteriorate the capacitor lifetime, and thus the entire system. The proposed Low-Voltage Ride-Through (LVRT) control strategy benefits from a reference current generation method, which can eliminate the oscillations at the dc-link and in the active power during unbalanced voltage dips. In addition, a reliable current limiting method is introduced, which can efficiently prevent overcurrent failure under grid faults. Performance of the proposed LVRT strategy is verified on a 2-kW system by simulations under unbalanced voltage dips.
Originalsprog | Engelsk |
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Titel | Proceedings of the 2017 IEEE Power and Energy Conference at Illinois (PECI) |
Antal sider | 6 |
Forlag | IEEE Press |
Publikationsdato | feb. 2017 |
ISBN (Trykt) | 978-1-5090-5550-0 |
DOI | |
Status | Udgivet - feb. 2017 |
Begivenhed | 2017 IEEE Power and Energy Conference at Illinois (PECI) - Champaign, USA Varighed: 23 feb. 2017 → 24 feb. 2017 |
Konference
Konference | 2017 IEEE Power and Energy Conference at Illinois (PECI) |
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Land/Område | USA |
By | Champaign |
Periode | 23/02/2017 → 24/02/2017 |
Fingeraftryk
Dyk ned i forskningsemnerne om 'A Low-Voltage Ride-Through Control Strategy for Three-Phase Grid-Connected PV Systems'. Sammen danner de et unikt fingeraftryk.Projekter
- 1 Afsluttet
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PV2GRID: A Next-Generation Grid Side Converter with Advanced Control and Power Quality Capabilities
Blaabjerg, F., Yang, Y. & Sangwongwanich, A.
01/01/2015 → 30/09/2017
Projekter: Projekt › Forskning