Akhmetov, ZhansenRuderman, Alex2022-03-142022-03-142020-05Akhmetov, Z., & Ruderman, A. (2020). Analytical current THD evaluation for three‐phase voltage source inverters. IET Power Electronics, 13(6), 1286–1289. https://doi.org/10.1049/iet-pel.2019.1257http://nur.nu.edu.kz/handle/123456789/6092This 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.enAttribution-NonCommercial-ShareAlike 3.0 United StatesType of access: Open Accesstotal harmonic distortionArticle