Analytical current THD evaluation for three‐phase voltage source inverters. Issue 6 (1st May 2020)

• Record Type: Journal Article
• Authors: Akhmetov, Zhansen; Ruderman, Alex
• Is Part Of: IET power electronics. Volume 13:Issue 6(2020)
• Page Start: 1286
• Page End: 1289
• Publication Date: 2020-05-01
• Subjects: voltage control -- harmonic distortion -- invertors -- PWM power convertors -- capacitors -- machine control; three‐phase voltage source inverters -- current total harmonic distortion -- three‐phase PWM inverters -- PWM current ripple mean square time‐domain calculation -- 2‐level inverter -- THD evaluation -- capacitor 3‐level three‐phase inverters -- closed‐form analytical solutions; Power electronics -- Periodicals; 621.31705
• DOI: 10.1049/iet-pel.2019.1257
• Languages: English
• ISSNs: 1755-4535

Abstract

Abstract : 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.