Design and Evaluation of Robust 20-kW SiC-Based Three-Phase Bidirectional AC-DC converter

• Published in: 2022 Progress in Applied Electrical Engineering (PAEE) pp. 1 - 7
• Main Authors: Grzejszczak, Piotr, Wolski, Kornel, Szymczak, Marek, Koszel, Mikolaj, Bzura, Kamil, Jasinski, Marek
• Format: Conference Proceeding
• Language: English
• Published: IEEE 27.06.2022
• Subjects: ac/dc converter; active front end (AFE); design; DPC; grid converter; MOSFET; Prototypes; Reactive power; Robust control; SiC; Silicon carbide; Switching frequency; thermal management; Transistors
• DOI: 10.1109/PAEE56795.2022.9966571

The subject of this article is a design approach of a two-level three-phase active front-end (AFE) converter with a power level rated at 20 kW and the DC-link voltage level of up to 800 V. By using discrete SiC MOSFETs characterized by low lead inductance and excellent dynamic properties it was possible to apply a relatively high switching frequency (60 kHz). An efficient microcontroller was used to implement an advanced control algorithm that includes, among others, a direct power control with space vector modulation (DPC-SVM) of both the active and reactive power components. Furthermore, noise-resistant grid synchronization is based on a double second-order generalized integrators with a frequency-locked loop (DSOGI-FLL) with a synchronous reference frame using a phase-locked loop (SRF-PLL). The paper presents the results of simulations and experimental tests.