Real-Time Loss Calculation of a Hysteresis Controlled Power Converter
Abstract
This paper presents an algorithm for real-time calculation of losses of a hysteresis controlled power converter. The converter under consideration is a standard three-phase bridge converter, consisting of six insulated-gate bipolar transistors (IGBTs) and free-wheeling diodes. It is here utilized for vector control of a self-excited induction generator. The vector control algorithm requires measurement of two phase currents, rotor speed, and dc-link voltage. Application of the loss-calculation algorithm, on the other hand, requires knowledge of the dc-link voltage, one of the phase currents and IGBT switching signals. Hence, all three required inputs are already available, so no additional sensors need to be installed in order to implement the loss- calculation algorithm. The proposed algorithm allows the power converter losses to be determined both by type (switching/conduction losses) and device (IGBT/diode losses), thus enabling a more detailed loss analysis. In this paper, the power converter losses are determined over reasonably wide ranges of dc- link voltage and phase current values, and subsequently validated by comparison with the measured values.
Mateo Bašić
Full Professor | Department of Power Electronics and Control
Full professor at the Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture in Split, with recent research interests related to the fields of power electronics and renewable energy sources, with a special focus on energy-efficient control of inverters, battery systems, wind turbines, photovoltaic sources and self-excited induction generators in microgrids - both in island operation and in grid-tie operation.
Dinko Vukadinović
Full Professor | Department of Power Electronics and Control
Full professor at the Faculty of Electrical Engineering, Mechanical Engineering, and Naval Architecture in Split, specialized in modern control systems for power electronic converters, electric motors, and generators. At the Power Electronics Research Laboratory, he leads experimental projects and develops advanced methods for regulating electrical machines and converters, while supervising doctoral research in these areas.
Ivan Grgić
Assistant Professor | Department of Power Electronics and Control
Assistant professor at the Faculty of Electrical Engineering, Mechanical Engineering and Architecture in Split, specialized in the research of power electronic converters in photovoltaic systems and microgrids. Currently, he teaches courses in the areas of control engineering, digital electronics, electrical engineering, electrical machines and transformers.