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- Title
Design of Robust Fuzzy Logic Controller Based on the Levenberg Marquardt Algorithm and Fault Ride Trough Strategies for a Grid-Connected PV System.
- Authors
Islam, Saif Ul; Zeb, Kamran; Din, Waqar Ud; Khan, Imran; Ishfaq, Muhammad; Hussain, Altaf; Busarello, Tiago Davi Curi; Kim, Hee Je
- Abstract
This paper emphasizes the design and investigation of a new optimization scheme for a grid-connected photovoltaic system (PVS) under unbalance faults. The proposed scheme includes fuzzy logic controller (FLC) based on the Levenberg–Marquardt (LM) optimization technique in coordination with bridge-type-fault-current limiter (BFCL) as the fault ride through (FRT) Strategy. The LM optimization-based control is an iterative process with a fast and robust response and is always convergent. The BFCL reduces the fault currents to rated values without compromising at ripples. A keen and critical comparison of the designed strategy is carried out with a conventionally tuned proportional-integral (PI) controller in coordination with the crowbar FRT strategy. A 100kW MATLAB/Simulink model of a photovoltaic system is used for simulation and analysis of unbalance faults at the point of common-coupling (PCC) and at 5 km away from PCC. It is found that grid-connected PVS is highly influenced by the fault type and less effected by the distribution line length. The simulation results authenticated smooth, stable, ripples with free, robust, and fault-tolerant behavior of the proposed scheme.
- Subjects
GRABENS (Geology); MARQUARDT algorithm; FUZZY logic; ITERATIVE learning control; FAULT currents; ROBUST control; MATHEMATICAL optimization
- Publication
Electronics (2079-9292), 2019, Vol 8, Issue 4, p429
- ISSN
2079-9292
- Publication type
Article
- DOI
10.3390/electronics8040429