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Article

On the Conflict between LVRT and Line Protection in LV Distribution Systems with PVs: A Current-Limitation-Based Solution

1
Department of Electrical and Computer Engineering, Democritus University of Thrace, 67132 Xanthi, Greece
2
EMEA Solutions Engineering Center, On Semiconductor, 85609 Munich, Germany
3
Regulatory Authority for Energy, Pireos 132, 11854 Athens, Greece
*
Author to whom correspondence should be addressed.
Energies 2019, 12(15), 2909; https://doi.org/10.3390/en12152909
Received: 6 June 2019 / Revised: 25 July 2019 / Accepted: 26 July 2019 / Published: 29 July 2019
(This article belongs to the Special Issue Power Electronics for Energy Saving)
The upcoming adoption of low-voltage-ride-through requirements in low-voltage distribution systems is expected to raise significant challenges in the operation of grid-tied inverters. Typically, these inverters interconnect photovoltaic units, which are the predominant distributed energy resource in low-voltage distribution networks, under an umbrella of standards and protection schemes. As such, a challenging issue that should be considered in low-voltage distribution network applications, regards the coordination between the line protection scheme (typically consisting of a non-settable fuse) and the low-voltage-ride-through operation of photovoltaic generators. During a fault, the fuse protecting a low-voltage feeder may melt, letting the generator to continue its ride-through operation. Considering that the efficacy/speed of the anti-islanding detection is affected by ride-through requirements, this situation can lead to protracted energization of the isolated feeder after fuse melting (unintentional islanding). To address this issue, this paper proposes a fault-current-limitation based solution, which does not require any modification in the existing protection scheme. The operation principles, design, and implementation of this solution are presented, while, its effectiveness is supported by extensive simulations in a test-case low-voltage distribution system. A discussion on the presented results concludes the paper. View Full-Text
Keywords: distribution system protection; fault-current limitation; low-voltage ride-through; photovoltaic generator distribution system protection; fault-current limitation; low-voltage ride-through; photovoltaic generator
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MDPI and ACS Style

Tsimtsios, A.; Voglitsis, D.; Perpinias, I.; Korkas, C.; Papanikolaou, N. On the Conflict between LVRT and Line Protection in LV Distribution Systems with PVs: A Current-Limitation-Based Solution. Energies 2019, 12, 2909. https://doi.org/10.3390/en12152909

AMA Style

Tsimtsios A, Voglitsis D, Perpinias I, Korkas C, Papanikolaou N. On the Conflict between LVRT and Line Protection in LV Distribution Systems with PVs: A Current-Limitation-Based Solution. Energies. 2019; 12(15):2909. https://doi.org/10.3390/en12152909

Chicago/Turabian Style

Tsimtsios, Aristotelis, Dionisis Voglitsis, Ioannis Perpinias, Christos Korkas, and Nick Papanikolaou. 2019. "On the Conflict between LVRT and Line Protection in LV Distribution Systems with PVs: A Current-Limitation-Based Solution" Energies 12, no. 15: 2909. https://doi.org/10.3390/en12152909

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