Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 33, Issue 1, Pages 802-818Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2017.2666847
Keywords
Circulating current; modular multilevel converter (MMC); optimization algorithms; selective harmonic elimination (SHE)
Categories
Funding
- Research and Education Unit [UFI11/16]
- Zabalduz Program of the UPV/EHU
- Basque Government within the Research program ELKARTEK under project HVDCLINK2 [KK-2016/00038-HVDCL2]
- Basque Government within the Research program ELKARTEK under project HVDCL-3
- Basque Government within the Research program ELKARTEK under project KT4TRANS [KK-2015/00047, KK-2016/00061]
- Basque Government [IT978-16]
- Ministerio de Economia y Competitividad of Spain [DPI2014-53685-C2-2-R]
- FEDER funds
Ask authors/readers for more resources
The performance of modular multilevel converters (MMCs) in medium-voltage applications, where the number of required submodules is not high, can be improved utilizing low switching frequency modulations such as (2N+1) selective harmonic elimination-pulse width modulation (SHE-PWM), which provides tight control of lower order harmonics and low switching losses. This paper proposes a calculationmethod, which is based on a novel formulation, to solve the SHE-PWM problem. In particular, MMCs with (2N+1) phase output voltage levels are considered, obtaining a (2N+1) SHE-PWM waveform. This method utilizes a unique system of equations that is valid for any possible waveform. Therefore, it is able to calculate simultaneously, without predefined waveforms, both the switching patterns and the associated firing angles that solve the (2N+1) SHE-PWM problem. Consequently, the search process is simplified and optimized. Furthermore, this paper also proposes a circulating current control technique, which can be applied along with (2N+1) SHE-PWM without disturbing the phase output voltage. Simulation results and experimental tests obtained with a single-phase laboratory prototype prove the validity of the novel (2N+1) SHE-PWM implementation method and the proposed circulating current control technique.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available