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DC Field | Value | Language |
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dc.contributor.advisor | Al-Raweshidy, H | - |
dc.contributor.advisor | Abbod, M | - |
dc.contributor.author | Al-Majidi, Sadeq Duair Aneed | - |
dc.date.accessioned | 2020-10-12T14:00:09Z | - |
dc.date.available | 2020-10-12T14:00:09Z | - |
dc.date.issued | 2020 | - |
dc.identifier.uri | http://bura.brunel.ac.uk/handle/2438/21643 | - |
dc.description | This thesis was submitted for the award of Doctor of Philosophy and was awarded by Brunel University London | en_US |
dc.description.abstract | The maximum power point tracking (MPPT) technique is considered a crucial part in photovoltaic (PV) system design for maximising the output power of a PV array and improving the stability and reliability of the PV system. This research focuses on developing common MPPT techniques, including: perturb and observe (P&O), fuzzy logic control (FLC), an adaptive neural-fuzzy inference system (ANFIS) and an artificial neural network (ANN) for a grid-connected PV system, with the best of them being identified. Whilst several techniques have been designed, the P&O algorithm is widely used for MPPT due to its low cost and simple implementation. However, the main drawbacks of this method are a slow tracking speed, high oscillation and a drift problem associated with changing irradiance rapidly. Hence, a modified P&O-MPPT based on the Pythagorean theorem and a constant voltage algorithm is proposed to address those issues by developing variable step size and early step decision for the conventional P&O algorithm, respectively. Unlikely, these modifications do not avoid the drift problem nor eliminate the oscillation completely. The FLC is a commonly deployed technique that achieves vastly improved performance for the MPPT technique in terms of response speed and low fluctuation. However, the key issues of the conventional FLC-MPPT are the drift problem and complex implementation, when compared with the P&O-MPPT. Hence, the MPPT technique based on the FLC and P&O algorithm is proposed to address these challenges. This technique incorporates the advantages of the P&O-MPPT to account for slow and fast changes in solar irradiance as well as reduced processing time for FLC-MPPT to address complex engineering problems when the number of rules of membership functions are fewer. As a result, the proposed technique achieves average tracking efficiencies of around 99.6% under the EN50530 standard test. The ANFIS technique and the ANN technique are used to predict the maximum power point of a PV array, using experimental training data, instead of the rules of membership functions. To improve the accuracy of those techniques, a curve fitting technique and the Particle Swarm Optimisation algorithm are utilised, respectively. These optimisations are classified into two strategies: adjusting the tuning of the ANFIS model as well as determining the right topology and the initial weights of the ANN model. As a result, the training errors of those models are minimised. Hence, the ANFIS technique achieves average tracking efficiencies of greater than 99.3% under a semi-cloudy day test, while the ANN technique delivers average tracking efficiencies of more than 99.67% and 99.30% on sunny and cloudy day tests, respectively. | en_US |
dc.description.sponsorship | Iraqi Minister of Higher Education and Scientific Research (MOHESR), Missan University and the Iraqi Cultural Attaché-London | en_US |
dc.language.iso | en | en_US |
dc.publisher | Brunel University London | en_US |
dc.relation.uri | https://bura.brunel.ac.uk/bitstream/2438/21643/1/FulltextThesis.pdf | - |
dc.subject | A modified Pe1iurb and Observe algorithm based on a Pythagorean theorem and Constant Voltage technique is presented | en_US |
dc.subject | A novel MPPT technique based on fuzzy logic control and the Pe1iurb and Observe algorithm is proposed | en_US |
dc.subject | An Adaptive Neural-Fuzzy Inference System based on a large experimental training data is designed | en_US |
dc.subject | A feedforward Artificial Neural Network technique is developed for predicting a maximum power point | en_US |
dc.subject | The EN 50530 standard test and experimental measurement tests are used to calculate the average tracking efficiency | en_US |
dc.title | Efficient Maximum Power Point Tracking Techniques for a Grid-connected Photovoltaic System using Artificial Intelligence | en_US |
dc.type | Thesis | en_US |
Appears in Collections: | Electronic and Electrical Engineering Dept of Electronic and Electrical Engineering Theses |
Files in This Item:
File | Description | Size | Format | |
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FulltextThesis.pdf | 17.45 MB | Adobe PDF | View/Open |
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