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Institutional Repository [SANDBOX]
Technical University of Crete
Technical University of Crete
EN
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| URI: | http://purl.tuc.gr/dl/dias/3AB92FA3-4AAC-4181-AFCA-3F5216DF1BF2 | ||
| Year | 2022 | ||
| Type of Item | Master Thesis | ||
| License |
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| Bibliographic Citation | Michail Dakanalis, "Design and implementation of real-time controller for DC/AC multi-port power converter capable of providing ancillary services to the electrical grid", Master Thesis, School of Electrical and Computer Engineering, Technical University of Crete, Chania, Greece, 2022 https://doi.org/10.26233/heallink.tuc.93272 | ||
| Appears in Collections |
In recent years, the need for greater utilization of renewable energy sources has favored the development of distributed generation (DG), altering how electricity production systems operate. In order to interconnect the DG units with the electrical network, appropriate electronic converters are required in order to regulate the quantity and improve the quality of power, achieving the maximum possible efficiency. Additionally, since DG units are so widely utilized, it is essential to provide ancillary services and support low voltage ride through capability. This master's thesis presents the design and implementation of a real-time controller for a multi-port converter capable of interfacing with a local load or the power grid. The converter has four inputs, three of which support bidirectional power flow. In particular, it permits the connection of a solar array, a supercapacitor bank, a battery bank and an electric vehicle. The designed control unit has been adapted to two different topologies of the converter which aims to reduce the cost, complexity as well as total power losses. Additionally, by properly utilizing the converter inputs, the controller enables frequency support and low voltage ride through capabilities. The correct operation of the controller was confirmed at simulation level and implemented in a microprocessor to operate the actual converter circuit. Finally, appropriate printed circuit boards were built for the voltage and current measurement of the converter in order to connect the real circuit with the control unit operating on the microprocessor. The obtained results show that the designed control unit operates properly, both for regulating power flows between the four inputs and the converter output and for producing low harmonic distortion.
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