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Impact of Switching Harmonics on Capacitor Cells Balancing in Phase-Shifted PWM-Based Cascaded H-Bridge STATCOM
- Source :
- Behrouzian, E, Bongiorno, M & Teodorescu, R 2017, ' Impact of Switching Harmonics on Capacitor Cells Balancing in Phase-Shifted PWM-Based Cascaded H-Bridge STATCOM ', I E E E Transactions on Power Electronics, vol. 32, no. 1, pp. 815-824 . https://doi.org/10.1109/TPEL.2016.2535481
- Publication Year :
- 2017
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2017.
-
Abstract
- The purpose of this paper is to investigate the impact of switching harmonics on the instantaneous power distribution in the cells of a cascaded H-bridge-based STATCOM when using phase-shifted pulse width modulation. The case of high- and low-switching frequency for the converter cells is investigated and the interaction between voltage and current harmonics is analyzed. It is shown that in both cases, this interaction results in an uneven power distribution among the cells in the same phase leg, leading to drifting of the dc-capacitor voltages and thereby the need for proper stabilization control loops. It is also shown that the selected frequency modulation ratio affects the active power distribution among the cells. In particular, the selection of a noninteger frequency modulation ratio helps in providing a more uniform power distribution among cells of the same phase leg, thus contributing to the capacitors balancing. A methodology for optimal selection of the frequency modulation ratio is given. Theoretical conclusions are validated through simulation and experimental results.
- Subjects :
- Physics
Pulse-frequency modulation
Static VAR compensators
Reactive power control
020209 energy
020208 electrical & electronic engineering
02 engineering and technology
Power factor
Cascade systems
AC power
H bridge
Pulse width modulation
law.invention
Harmonic analysis
Capacitor
Control theory
law
Harmonics
0202 electrical engineering, electronic engineering, information engineering
Multilevel systems
Electrical and Electronic Engineering
Frequency modulation
Pulse-width modulation
Subjects
Details
- ISSN :
- 19410107 and 08858993
- Volume :
- 32
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Power Electronics
- Accession number :
- edsair.doi.dedup.....cdaacfabfe590941b8552266f9e9b5b6