期刊
IEEE TRANSACTIONS ON POWER ELECTRONICS
卷 35, 期 4, 页码 4411-4425出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2019.2939727
关键词
Harmonic analysis; Power harmonic filters; Inverters; Analytical models; Electromagnetic interference; Pulse width modulation; Support vector machines; Electromagnetic interference (EMI); harmonics; interleaving angle; paralleled converters; space vector modulation (SVM); three-level inverters
资金
- Boeing Company
- NASA
- Engineering Research Center Program of the National Science Foundation (NSF) [EEC-1041877]
- Department of Energy under NSF [EEC-1041877]
- Center for Ultra-Wide-Area Resilient Electric Energy Transmission Networks Industry Partnership Program
Paralleling three phase three-level inverters is gaining popularity in industrial applications. However, analytical models for the harmonics calculation of a three-level neutral point clamped (NPC) inverter with popular space vector modulation (SVM) are not found in the literature. Moreover, how interleaving angle impacts the dc- and ac-side harmonics and electromagnetic interference (EMI) harmonics in parallel interleaved three-level inverters and how to optimize interleaving angle to reduce these harmonics have not been discussed in the literature. Furthering previous study, this article presents the modeling, analysis, and reduction of harmonics in paralleled and interleaved three-level NPC inverters with SVM. Analytical models for harmonic calculation are developed, and the dc-side harmonics characteristics of an NPC inverter are identified. The impact of interleaving angle on the ac-side voltage and dc-link current harmonics of parallel interleaved three-level NPC inverters is comprehensively studied. The impact of switching frequency and interleaving angle on EMI harmonics is also illustrated. Optimal interleaving angle ranges to reduce these harmonics are derived analytically. The developed models and harmonic reduction analysis are verified experimentally with two paralleled and interleaved three-level NPC inverters.
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