A Real-Time Real-Power Emulator for a Medium-Voltage High-Speed Electrical Drive: Discussion on Mechanical Vibrations

This article, based on modeling and scaling as well as simulation and experiment, provides a comprehensive discussion on a real-time real-power emulator for a medium-voltage, high-power, high-speed motor drive. A three-phase modular multilevel double-star chopper-cell (DSCC) inverter under test is c...

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Bibliographic Details
Published in:IEEE transactions on industry applications 2021-03, Vol.57 (2), p.1482-1494
Main Authors: Saito, Kenichiro, Akagi, Hirofumi
Format: Article
Language:English
Subjects:
Bending
Bending vibrations
Centrifugal compressors
Circuits
Electric potential
Electronic circuits
Emulators
High speed
Induction motors
Inductors
Inverters
jeffcott rotors
Magnetism
medium-voltage high-speed motor drives
Modelling
modular multilevel cascade converters
Real time
real-time real-power emulators
Real-time systems
Rectifiers
Rotors
Vibrations
Voltage
Waveforms
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Summary:This article, based on modeling and scaling as well as simulation and experiment, provides a comprehensive discussion on a real-time real-power emulator for a medium-voltage, high-power, high-speed motor drive. A three-phase modular multilevel double-star chopper-cell (DSCC) inverter under test is connected in front-to-front (FTF) with the emulator. The DSCC inverter is the same in circuit configuration as the DSCC rectifier. This emulator is characterized by integrating mechanical dynamics of both motor and load into it. The power-electronic circuit of the emulator consists of a three-phase DSCC rectifier, three ac inductors, and a single two-winding common-mode inductor at the dc side. This article starts with modeling and scaling of a three-phase 6.6-kV 10.9-MW four-pole 9000-r/min induction motor drive. Then, the authors design, build, and test a three-phase 200-V 10-kW downscaled test bench. Experimental waveforms from the 10-kW test bench, as well as simulated waveforms from the 10.9-MW full-scale and 10-kW downscaled systems, lead to the following conclusion: The emulator can reproduce both electrical and mechanical dynamics of the three-phase 200-V, 10-kW, four-pole, 9000-r/min induction motor coupled with a centrifugal compressor.
ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2021.3054605