Open AccessLogic‐based space‐vector modulation for neutral‐point‐clamped multilevel inverter with DC‐link voltage balancing capability
Author(s) -
Amini Jalal,
Moallem Mehrdad
Publication year - 2020
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2020.0594
Subject(s) - control theory (sociology) , computer science , modulation (music) , converters , voltage , inverter , point (geometry) , reference frame , capacitor , space vector modulation , sequence (biology) , frame (networking) , electronic engineering , algorithm , topology (electrical circuits) , engineering , mathematics , control (management) , electrical engineering , physics , artificial intelligence , telecommunications , geometry , biology , acoustics , genetics
This study proposes a new simple and fast space‐vector modulation scheme with the capability of balancing capacitor voltages in neutral‐point‐clamped converters. In the first step, transformations from the commonly used reference frames to the 60°‐frame are discussed. Next, a new method is presented to generate an appropriate switching sequence based on the voltage of the clamp point and direction of the phase currents. The proposed method is computationally efficient and its algorithm only needs knowledge of the load current directions, leading to further simplification of the hardware. This method can easily be generalised to control diode‐clamped multilevel inverters with an arbitrary number of levels. The feasibility, effectiveness, and performance of the method are investigated through simulation and experimental studies under various load conditions.