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Electronics 2018, 7(12), 451; https://doi.org/10.3390/electronics7120451

Design of a Proportional Resonant Controller with Resonant Harmonic Compensator and Fault Ride Trough Strategies for a Grid-Connected Photovoltaic System

1
School of Electrical Engineering, Pusan National University, San 30, ChangJeon 2 Dong, Pusandaehak-ro 63 beon-gil 2, Geumjeong-gu, Busan 46241, Korea
2
School of Electrical Engineering and Computer Science, National University of Sciences and Technology, Islamabad 44000, Pakistan
3
Department of Engineering, Federal University of Santa Catarina Blumenau, Rua João Pessoa, 2750-89036-256, Brazil
*
Author to whom correspondence should be addressed.
Received: 2 November 2018 / Revised: 9 December 2018 / Accepted: 14 December 2018 / Published: 19 December 2018
(This article belongs to the Special Issue Grid Connected Photovoltaic Systems)
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Abstract

This paper presents the design and analysis of a proportional resonant controller with a resonant harmonic compensator and switch-type fault current limiter, as a fault-ride through strategy for a three-phase, grid-connected photovoltaic (PV) system under normal conditions and asymmetrical faults. The switch-type fault limiter comprised of current-limiting inductors, a bridge rectifier, a snubber capacitor, linear transformers, and energy absorption bypass. Furthermore, a critical and analytical comparison of switch-type fault limiters is carried out, with the conventional crowbar as the fault-ride through strategy, in combination with a conventionally tuned proportional integrator controller. The designed fault-ride through strategies with proportional integrator and proportional resonant controllers with resonant harmonic compensators are tested at the point of common coupling of the photovoltaic system and at a distance of 19 km from the point of common coupling, in order to analyze the impacts of fault parameter with respect to location. A MATLAB/Simulink model of a 100 kW three-phase grid-connected photovoltaic system is used for analysis. The simulation results of the proposed switch-type fault limiter with proportional resonant controller effectively validate the stable, ripple-free, and robust response compared to all other configurations. In addition, it is also verified that the grid faults on the PV system have a significant impact on fault type, and less impact on fault location. View Full-Text
Keywords: photovoltaic system (PVS); distributed-energy-resources (DERs); PI controller; PR controller; low-voltage ride-through (LVRT); fault-ride through (FRT) strategy; switch-type fault current limiter (STFCL); crowbar strategy; point of common coupling (PCC); asymmetrical faults photovoltaic system (PVS); distributed-energy-resources (DERs); PI controller; PR controller; low-voltage ride-through (LVRT); fault-ride through (FRT) strategy; switch-type fault current limiter (STFCL); crowbar strategy; point of common coupling (PCC); asymmetrical faults
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Islam, S.U.; Zeb, K.; Din, W.U.; Khan, I.; Ishfaq, M.; Busarello, T.D.C.; Kim, H.J. Design of a Proportional Resonant Controller with Resonant Harmonic Compensator and Fault Ride Trough Strategies for a Grid-Connected Photovoltaic System. Electronics 2018, 7, 451.

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