1. Analytical current THD evaluation for threephase voltage source inverters.
- Author
-
Zhansen Akhmetov and Ruderman, Alex
- Subjects
IDEAL sources (Electric circuits) ,PULSE width modulation ,PULSE width modulation transformers ,PULSE width modulation inverters ,CAPACITORS - 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. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF