Dead-Time Compensation Strategy for Three-Phase Four Wire Grid Connected Inverter
Journal
IFEEC 2025 - Proceedings of the 2025 International Future Energy Electronics Conference
Start Page
278
End Page
283
ISBN (of the container)
979-833154947-3
Date Issued
2025-12-24
Author(s)
Abstract
Ensuring a long-term and reliable three-phase grid connected inverter operation involves embedding deadtime to the gating signals of semiconductor switches. Moreover, the quality of the controlled output currents relies on the current sensors and control circuitry which inevitably suffers from the influence of current measurement error (CME). In the case of the three-phase four wire grid connected inverter (TPFW GCI), both practical issues can lead to severe current distortions and deviation of the split capacitor voltages, which are revealed in this paper. Moreover, this paper proposes a perphase Multi-Resonant Offset Suppression (MROS) current controller to simultaneously compensate for both dead-time and CME effects. The benefits of the proposed MROS controller, compared with the conventional controllers, are presented and verified through computer simulations. Employment of the proposed MROS controller improves the quality of the regulated currents and maintains midpoint split capacitor voltages in both balanced and unbalanced three-phase power flows, despite dead-time and CME effects.
Event(s)
2025 International Future Energy Electronics Conference, IFEEC 2025
Subjects
current distortion
current measurement error (CME)
dead-time
four wire
grid connected inverter
Multi-Resonant Offset Suppression (MROS) controller
split capacitors
voltage deviation
Publisher
IEEE
Type
conference paper