Golden Slumber Torrent
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In recent decades, increasing levels of electric energy demand and the introduction of renewable energy sources in the electric power network have made the peak power grid more and more vulnerable to disturbances. To mitigate the serious problems of the electric power grid related to this issue, it was imperative to fully investigate and build a controllable power electronics converter in order to improve energy management features in achieving grid stability. In this thesis, results of a research project are presented admitting the evaluation of the applicability and performance of a low-cost DC-to-AC converter through optimum power converter design. The research project was focused on the analysis, design, and characterization of a maximum power point tracking (MPPT) converter proposed by the candidate. MPPT converters are specified in IEC-60076-3, where applicable. The system under study is 50 kW power-line-interactive (PLI) or 50 kW power-line-based (PLB) converter quoted in IEC-60076-3. The mean average AC efficiency and mean power factor of the converter under study are > 85% and > 0.99, respectively. These results are achieved by a combined control of the proposed topology along with the proper choice of the power supply to load (PSPL) ratio, semiconductor switches, frequency of active power transfer (AIN/P) and narrow pulse width modulation (NPWM). The proposed topology increases the operating AC-converter range by utilizing the AC-DC converter as a medium load and, thus, utilizing the full input DC-bus voltage for active power transfer. The proposed topology also limits the voltage fluctuation in the AC bus using the bi-directional DC-AC converter as a line filter. Finally, the proposed topology attenuates ac-line harmonics generated in the AC line for reducing line harmonics in the AC-AC' converter. The key aspects of the above mentioned performance enhancing features are the innovative topology of the proposed MPPT converter and the control strategy proposed for it. d2c66b5586