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Simple voltage balancing approach for CHB multilevel inverter considering low harmonic content based on a hybrid optimal modulation strategy

Ghazanfari, A ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1109/TPWRD.2012.2205277
  3. Publisher: IEEE , 2012
  4. Abstract:
  5. This paper presents an effective hybrid optimal modulation technique for a cascaded H-bridge (CHB) multilevel inverter. The introduced method is generalized optimal pulsewidth modulation, which can be extended to any m-level CHB multilevel inverter operating at any switching frequency. The presented hybrid optimal modulation strategy includes the pattern exchange and optimal modulation techniques. In the optimal modulation technique, the hybrid interior-point algorithm, which is more flexible and efficient than conventional optimization techniques, is applied. The proposed hybrid optimal modulation strategy yields balanced units' output fundamental voltages, and low total harmonic distortion without the need for additional stabilizers. The performance of the proposed modulation strategy is verified by simulation studies and experimental results using a five-level CHB single-phase multilevel inverter
  6. Keywords:
  7. Hybrid interior-point algorithm ; Multilevel inverters ; Sinusoidal pulsewidth modulation (SPWM) ; Cascaded H-bridge ; Conventional optimization ; Harmonic contents ; Interior point algorithm ; Modulation strategy ; Modulation techniques ; Multilevel inverter ; Simulation studies ; Sinusoidal pulse width modulation ; Total harmonic distortion (THD) ; Voltage balancing ; Algorithms ; Bridge circuits ; Electric inverters ; Frequency modulation ; Pulse width modulation ; Optimization
  8. Source: IEEE Transactions on Power Delivery ; Volume 27, Issue 4 , July , 2012 , Pages 2150-2158 ; 08858977 (ISSN)
  9. URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6255813