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Theory and Experiment on an Optimal Carrier Frequency of a Modular Multilevel Cascade Converter With Phase-Shifted PWM
- Source :
- IEEE Transactions on Power Electronics. 31:3456-3471
- Publication Year :
- 2016
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2016.
-
Abstract
- This paper provides theoretical and experimental discussions on an optimal carrier frequency for a phase-shifted pulsewidth modulation modular multilevel cascade converter for grid connections. The theoretical discussion concludes that a ratio of the optimal carrier frequency with respect to the supply (ac) frequency is 5/2. A three-phase downscaled front-to-front system is designed, constructed, and tested to confirm validity of the theoretical discussion. It consists of a pair of three-phase modular multilevel cascade converters rated at 400 Vdc and 10 kW, where the carrier frequency is set to 450 Hz and the ac frequency to 180 Hz, that is, their ratio is equal to 5/2. Moreover, simulated waveforms are compared to experimental ones under the same operating conditions. Both experimental and simulated waveforms agree well with each other not only in steady states but also in transient states.
- Subjects :
- Engineering
business.industry
020209 energy
020208 electrical & electronic engineering
02 engineering and technology
Converters
Modular design
Harmonic analysis
Cascade converter
Cascade
Modulation
Control theory
0202 electrical engineering, electronic engineering, information engineering
Transient (oscillation)
Electrical and Electronic Engineering
business
Pulse-width modulation
Subjects
Details
- ISSN :
- 19410107 and 08858993
- Volume :
- 31
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Power Electronics
- Accession number :
- edsair.doi.dedup.....840622e511f6bc0d82f9378de704aaae