Tan, Adrian Soon Theam (2016) Maximum Power Point Tracking Using Llc Resonant Converter For Pv Power Systems. Masters thesis, Universiti Sains Malaysia.
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Abstract
Pengesanan titik kuasa maksimum (MPPT) merupakan salah satu bahagian yang penting dalam pelbagai sistem fotovoltan (PV) dan telah dikaji dengan teliti dalam kajian lepas. Walau bagaimanapun, kebanyakan sistem pengesanan titik kuasa maksimum menggunakan penukar DC-DC permodulatan lebar denyut. Baru-baru ini, penukar salunan DC-DC menjadi terkenal untuk pemprosesan kuasa kerana mempunyai ciriciri yang baik seperti kehilangan pensuisan yang rendah, operasi frekuensi tinggi dan gangguan elektromagnetik yang rendah. Dalam penyelidikan ini, algoritma pengaliran tambahan (INC) dicadangkan dengan menggunakan penukar salunan LLC untuk pengesanan titik kuasa maksimum dalam sistem kuasa PV. Penukar salunan LLC mampu mengesan kuasa maksimum semasa beroperasi dengan pensuisan sifar voltan mengakibatkan kecekapan yang tinggi untuk operasi frekuensi tinggi. Selain itu, INC MPPT dengan mod voltan malar (CV) untuk pengecasan bateri dicadangkan dalam kajian ini. Pelaksanaan terperinci MPPT dengan mod CV algoritma dan carta aliran serta prosedur reka bentuk penukar dibincangkan dengan teliti dalam tesis ini. Keputusan eksperimen prototaip 100W menunjukkan bahawa penukar mencatat kecekapan puncak setinggi 81% untuk keseluruhan julat reka bentuk. Sebagai tambahan, penukar juga mempamerkan prestasi yang baik dalam menguasai kuasa maksimum di bawah pelbagai keadaan persekitaran sambil menonjolkan keupayaan pensuisan lancar. ________________________________________________________________________________________________________________________ Maximum power point tracking (MPPT) is a crucial part in any photovoltaic (PV) systems and is thoroughly addressed in the literature. However, most of the existing MPPT systems use pulse-width modulated DC-DC converters. Recently, resonant DCDC converters have become famous for power processing due to their good characteristics such as low switching loss, high frequency operation and low electromagnetic interference. In this research work, an incremental conductance (INC) MPPT using LLC resonant converter is proposed for PV power systems. The LLC resonant converter can track the maximum power while operating in zero voltage switching region resulting in high efficiency for high frequency operation. In addition, an INC MPPT with constant voltage (CV) mode for battery charging is proposed in this study. Detailed implementation of the MPPT with CV mode algorithm and its flowchart as well as the design procedure of the LLC resonant converter is thoroughly discussed in this thesis. The experimental results of a 100W prototype shows that the converter obtains a peak efficiency of 81% for the entire design range. In addition, the converter exhibits good performance in capturing the maximum power under various environmental conditions while performing soft-switching capabilities.
| Item Type: | Thesis (Masters) |
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| Additional Information: | Full text is available at http://irplus.eng.usm.my:8080/ir_plus/institutionalPublicationPublicView.action?institutionalItemId=3123 |
| Subjects: | T Technology T Technology > TK Electrical Engineering. Electronics. Nuclear Engineering > TK1-9971 Electrical engineering. Electronics. Nuclear engineering |
| Divisions: | Kampus Kejuruteraan (Engineering Campus) > Pusat Pengajian Kejuruteraaan Elektrik & Elektronik (School of Electrical & Electronic Engineering) > Thesis |
| Depositing User: | Mr Mohd Jasnizam Mohd Salleh |
| Date Deposited: | 03 Sep 2018 07:28 |
| Last Modified: | 03 Sep 2018 07:28 |
| URI: | http://eprints.usm.my/id/eprint/41648 |
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