Dual 3-Phase Bridge Multilevel Inverters for AC Drives with Voltage Sag Ride-through Capability

Vitor Fernão Pires, Joaquim Monteiro and José Fernando Silva
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Vitor Fernão Pires: SustainRD, EST Setubal, Polytechnic Institute of Setúbal, 2914-761 Setúbal, Portugal
Joaquim Monteiro: INESC-ID, 1000-029 Lisboa, Portugal
José Fernando Silva: INESC-ID, 1000-029 Lisboa, Portugal

Energies, 2019, vol. 12, issue 12, 1-18

Abstract: One of the main power quality issues that can affect variable speed drives (VSDs) is the occurrence of voltage sags on their AC power supply. Voltage sags can affect the inverter nominal operation, leading to a malfunction of the AC motor. This paper presents an inverter with resilient capability to voltage sags. The topology consists of two conventional three-phase bridge inverters arranged to require just a single DC source. This inverter is also characterized by a voltage multilevel operation, providing the full advantages of multilevel converters without the need for level balancing. Associated with this AC motor driver, a control system based on a field-oriented controller with a vector voltage modulator that will enable voltage sag ride-through capability is proposed. The proposed control system does not require any changes in the occurrence of voltage sags. To verify the characteristics of the proposed drive and control system, simulation tests are provided. Simulation results confirm the voltage sag resilient capability of the proposed multilevel converter.

Keywords: AC drive; multilevel inverter; voltage sag ride-through; dual inverter; floating capacitor (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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