The Equivalent Relationship Between Space Vector Modulation and Carrier Modulation of Parallel NPC-3L Inverters

• DOI: 10.1109/jestpe.2023.3340724
• Publication Date: 2023-12-07T19:40:22Z
• Authors: Gaohongyi Sun; Yingjie He; Haoting Du; Shenglun Zhuang; Jinjun Liu
• Keywords: Modulation (music); Space vector modulation; Space vector; Delta modulation

To improve the power capacity of system, several inverters are usually used in parallel. At present, global space vector modulation (SVPWM) parallel has been studied. However, when more parallel, implementation SVPWM is very complicated and its calculation amount greatly increased. Carrier-based pulsewidth (CBPWM) simple to operate implement. The traditional study on equivalent relationship between CBPWM multilevel only applicable monotonically increasing or decreasing sequences half cycle. sequence NPC-3L inverter exists condition two-level jump cycle, which not solved at present. Therefore, a new method proposed analyze inverters. In wave decomposition, choice carrier determined by switching states sequence, number submodulated waves tubes inverter. Through strict theoretical derivation experiment, equivalence multiple arbitrary segments achieved successfully, N derived.