Analytical current THD evaluation for three-phase voltage source inverters

This study addresses the calculation of current total harmonic distortion (THD) for three-phase (3P) pulse-width modulation (PWM) inverters. First, it demonstrates how an analytical approach to PWM current ripple normalised mean square (NMS) calculation introduced in the late 1980s for a two-level (...

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Bibliographic Details
Published in:IET power electronics 2020-05, Vol.13 (6), p.1286-1289
Main Authors: Akhmetov, Zhansen, Ruderman, Alex
Format: Article
Language:English
Subjects:
2‐level inverter
capacitor 3‐level three‐phase inverters
capacitors
closed‐form analytical solutions
current total harmonic distortion
harmonic distortion
invertors
machine control
PWM current ripple mean square time‐domain calculation
PWM power convertors
Rapid Communication
THD evaluation
three‐phase PWM inverters
three‐phase voltage source inverters
voltage control
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Summary:This study addresses the calculation of current total harmonic distortion (THD) for three-phase (3P) pulse-width modulation (PWM) inverters. First, it demonstrates how an analytical approach to PWM current ripple normalised mean square (NMS) calculation introduced in the late 1980s for a two-level (2L) inverter can be used for current THD evaluation. Second, it is shown how to evaluate current THD for a three-level (3L) 3P inverter using the current ripple NMS concept. Though considered is a 3P cascaded inverter with one H-bridge per phase, the results are applicable to popular 3L neutral point clamped (T-type) and flying capacitor inverters.
ISSN:1755-4535
1755-4543
1755-4543
DOI:10.1049/iet-pel.2019.1257