Comparative Study of a Buck DC-DC Converter Controlled by the MPPT (P&O) Algorithm without or with Fuzzy Logic Controller
Abstract
:1. Introduction
- -
- STEP-DOWN converters or serial converters (BUCK converters), where the output voltage is lower than the input voltage or at most equal;
- -
- STEP-UP converters or parallel converters (BOOST converters), where the output voltage is higher or at least equal to the input voltage;
- -
- STEP—DOWN/UP converters or series-parallel converters (BUCK–BOOST converters), where the output voltage can be lower or higher than the input voltage;
- -
- CUK converters—hybrid converters of boost and buck converters;
- -
- Bridge-type converters.
1.1. Literature Review
1.2. Contributions to the Work Achievement
2. Materials and Methods
2.1. Design Elements of the Step-Down Converter
2.1.1. Calculation of the Filtering Inductance
2.1.2. Condenser Calculation
2.1.3. Calculation of Load Resistance
2.2. Elaborating the Models in MATLAB-Simulink DC-DC Buck Converter
2.2.1. Control Algorithms of the DC-DC Converters for Following Up the Maximum Power Point
2.2.2. Perturb and Observe (P&O) Algorithm
- (), at the maximum power point MPP;
- (), on the left side of the maximum power point MPP;
- (), on the right side of the maximum power point MPP.
2.2.3. Incremental Conductance Algorithm
2.3. Design of the Fuzzy Logic Controller
- (1)
- If (E(K) is NM) and (dE(k) is NB), then (u(k) is ZE);
- (2)
- If (E(K) is PB) and (dE(k) is NS), then (u(k) is PB).
2.4. Model in MATLAB-Simulink of the Buck DC-DC Converter Controlled through the Perturb and Observe (P&O) Algorithm without a Fuzzy Logic Controller
2.5. Model in MATLAB-Simulink of the Buck DC-DC Converter Controlled through the Perturb and Observe (P&O) Algorithm with a Fuzzy Logic Controller
3. Simulation Results
Comparative Study between the Simulation Results Obtained through the Two Methods
4. Construction of the DC-DC Buck-Type Converter Controlled through the Development Board Arduino Uno
5. Conclusions and Perspectives
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
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dE(k) | ||||||||
---|---|---|---|---|---|---|---|---|
NB | NM | NS | ZE | PS | PM | PB | ||
E(k) | NB | ZE | ZE | ZE | NB | NB | NB | NB |
NM | ZE | ZE | ZE | NM | NM | NM | NM | |
NS | NS | ZE | ZE | NS | NS | NS | NS | |
ZE | NM | NS | ZE | ZE | ZE | PS | PM | |
PS | PM | PS | PS | PS | ZE | ZE | ZE | |
PM | PM | PM | PM | ZE | ZE | ZE | ZE | |
PB | PB | PB | PB | ZE | ZE | ZE | ZE |
Solar radiation variation (W/m2) | 1000 | 700 | 1000 | 1000 |
Temperature variation (°C) | 25 | 25 | 40 | 50 |
Ppv power variation for the P&O model (Kw) | 0.38 | 0.08 | 0.35 | 0.33 |
Ppv power variation for the P&O with fuzzy logic controller (Kw) | 0.47 | 0.25 | 0.45 | 0.43 |
Usource (V) | 25.40 | 26.40 | 27.50 | 28.50 | 29.50 |
Isource (A) | 2.09 | 2.18 | 2.30 | 2.42 | 2.45 |
Psource (W) | 53.08 | 57.55 | 63.25 | 68.97 | 72.27 |
Uload (V) | 16.97 | 17.60 | 19.20 | 19.60 | 19.80 |
Iload (A) | 2.35 | 2.50 | 2.60 | 2.80 | 2.85 |
Pload (W) | 39.88 | 44.00 | 49.92 | 54.88 | 56.43 |
Duty-cycles (0–255) | 121 | 131 | 139 | 143 | 145 |
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Livinti, P.; Culea, G.; Banu, I.V.; Vernica, S.G. Comparative Study of a Buck DC-DC Converter Controlled by the MPPT (P&O) Algorithm without or with Fuzzy Logic Controller. Appl. Sci. 2024, 14, 7628. https://doi.org/10.3390/app14177628
Livinti P, Culea G, Banu IV, Vernica SG. Comparative Study of a Buck DC-DC Converter Controlled by the MPPT (P&O) Algorithm without or with Fuzzy Logic Controller. Applied Sciences. 2024; 14(17):7628. https://doi.org/10.3390/app14177628
Chicago/Turabian StyleLivinti, Petru, George Culea, Ioan Viorel Banu, and Sorin Gabriel Vernica. 2024. "Comparative Study of a Buck DC-DC Converter Controlled by the MPPT (P&O) Algorithm without or with Fuzzy Logic Controller" Applied Sciences 14, no. 17: 7628. https://doi.org/10.3390/app14177628