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In this project, the proposed inverter is based on inverting buck-boost DC/DC converter which has been modified to meet the requirements for three phase application. Besides, a novel switching pattern has been used. The overall strategy is that based on the amplitude and phase of three phase grid voltages and the amount of power considered to be injected into the grid, the amplitude and phase of three phase currents are determined. Then, the inverter and the switching pattern are employed so that the desired three phase currents are programed at the output.
With the proper selection of the topology and the novel switching method, it is possible to inject power into the grid regardless of amount of DC voltage with respect to grid voltage. Using non-electrolytic capacitors has improved the reliability of the inverter and by employing an inductor to transfer power from DC side to grid, soft switching has been realized in most of the switching transitions. Also, with the proposed switching pattern, there is no leakage current related to parasitic capacitor of the PV panel.
Power Electronics and Energy Systems Laboratory was established in 2010 with the aim of training efficient engineers and researchers. In this educational and research environment, specialized fields such as the design of power electronic systems, including all types of power supplies, inverters and rectifiers, high and multi-level power converters, types of high voltage or HV systems, energy conversion systems, etc. are under study and research.
Design: Mahyan
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