0000000000380655

AUTHOR

Yongheng Yang

showing 3 related works from this author

A Novel Symmetrical Boost Modulation Method for qZS-based CHB Inverters

2020

Quasi-Z-source cascaded H-bridge (qZS-CHB) inverters are arising as an innovation in the field of the electrical conversion for PV applications. This type of converters inherit the advantages of multilevel inverters and single-stage configuration. In this context, this paper proposes a novel symmetrical boost modulation strategy for qZS CHB multilevel inverters to increase the performance in terms of voltage stresses and power quality. The novelty lies in the adoption of a different concept to generate the shoot-through states compared to the traditional methods. Simulation analysis in a grid connected application to evaluate the benefits of this boost method is performed in the MATLAB/PLEC…

Computer scienceContext (language use)02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti Elettrici7. Clean energy01 natural sciencesHarmonic analysisharmonics0103 physical sciences0202 electrical engineering electronic engineering information engineeringElectronic engineeringquasi-Z source cascaded H-Bridge multilevel invertersMATLABcomputer.programming_language010302 applied physics020208 electrical & electronic engineeringConvertersGridboost methodgrid-connected applicationcomputerPhase modulationPulse-width modulationPV systemVoltage2020 IEEE 21st Workshop on Control and Modeling for Power Electronics (COMPEL)
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Modified Modulation Techniques for Quasi-Z-Source Cascaded H-Bridge Inverters

2018

Quasi-Z-source cascaded H-bridge (q Z S - C H B) inverters are one promising solution for high power photovoltaic (PV) systems. This type of topologies inherits the advantages of cascaded converters (i.e., multilevel outputs) and impedance-source inverters (i.e., high conversion ratios). In addition, it allows increasing the inverter reliability (with high redundancy). However, the modulation and control of qZS-CHB inverters are challenging to a certain extent. Thus, this paper proposes modified modulation techniques to increase the performances of qZS-CHB converters in terms of voltage gains and stresses. The novelty lies in the use of the switching frequency optimal as reference signals i…

Control and OptimizationComputer science020209 energyEnergy Engineering and Power Technology02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciNetwork topologyIndustrial and Manufacturing EngineeringModulation techniquePV systemsmodulation techniquesharmonicsquasi-z source cascaded h-bridge inverters0202 electrical engineering electronic engineering information engineeringElectronic engineeringRedundancy (engineering)Electrical and Electronic EngineeringQuasi-Z source cascaded H-Bridge inverter020208 electrical & electronic engineeringPhotovoltaic systemHarmonicH bridgeSettore ING-IND/31 - ElettrotecnicaModulationHarmonicsInverterPV systemVoltage
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Performance Evaluation of a Three- Phase Five-Level Quasi-Z-Source Cascaded H-Bridge for Grid-Connected Applications

2018

In the field of the PV generation, Quasi-Z-source cascaded H-bridge (qZS-CHB) inverters are promising due to their features of modularity and high voltage conversion ratio. Thus, new topology structures and innovative modulation techniques are continuously being developed to improve the performance in terms of voltage stress and harmonic content. This paper proposes an innovative modulation technique that allows reducing the voltage stress and a specially designed grid-connected control strategy is also introduced. Through simulations in MATLAB, it has been validated that the performance of a three-phase five-level qZS-CHB is improved with the proposed solution.

Computer science020209 energyEnergy Engineering and Power TechnologyTopology (electrical circuits)02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciPV systemsmodulation techniquesharmonicharmonics0202 electrical engineering electronic engineering information engineeringElectronic engineeringElectrical and Electronic EngineeringMATLABcomputer.programming_languageQuasi-Z-source cascaded H-Bridge inverters020208 electrical & electronic engineeringHigh voltageH bridgeQuasi-Z-source cascaded H-Bridge inverterSettore ING-IND/31 - ElettrotecnicaThree-phasemodulation techniqueHarmonicsHarmoniccomputerPV systemVoltage
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