Performance Comparison of Variable-Angle Phase-Shifting Carrier PWM Techniques

Monopoli, Vito Giuseppe; Ko, Youngjong; Buticchi, Giampaolo; Liserre, Marco

doi:10.1109/tie.2017.2777419

Cited by 29 publications

(19 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…3b and Fig. 3c drawn in red and yellow, respectively considering f c equal to 1 kHz [24]. The main impact of this low-order harmonic distortion is related to the output filter of the CHB, which has to be designed to keep the output waveforms quality above the minimum standards.…”

Section: Overview Of Active Thermal Control For Chb Convertersmentioning

confidence: 99%

Sampling-Time Harmonic Control for Cascaded H-Bridge Converters With Thermal Control

Márquez

Monopoli

Leon

et al. 2020

IEEE Trans. Ind. Electron.

Self Cite

View full text Add to dashboard Cite

Cascaded H-bridge converter (CHB) is a multilevel topology that is a well-suited solution for multiple applications such as flexible ac transmission systems or motor drives. This paper is focused on a CHB where the cells present an aging mismatch. This can be caused by the maintenance operation which forces to replace some damaged cells of the converter with new or repaired ones. In this paper, a new improved approach of the active thermal control (ATC) of the CHB using Discontinuous PWM (D-PWM) is presented. The D-PWM technique is used to reduce the power losses of one cell reducing its average temperature in order to increase its remaining lifetime. However, the combination of D-PWM with traditional Phase-Shifted PWM (PS-PWM) introduces high harmonic distortion in the output voltage of the CHB converter at twice the carrier frequency. A detailed harmonic distortion analysis of the CHB output voltage when the D-PWM based ATC is active is presented. From this analysis, a modification of the traditional PS-PWM is derived to eliminate the harmonic distortion at twice the carrier frequency. Experimental results show how the ATC using D-PWM is achieved whereas the harmonic distortion around twice the carrier frequency is eliminated.

show abstract

Section: Overview Of Active Thermal Control For Chb Convertersmentioning

confidence: 99%

Sampling-Time Harmonic Control for Cascaded H-Bridge Converters With Thermal Control

Márquez

Monopoli

Leon

et al. 2020

IEEE Trans. Ind. Electron.

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, the work, which has been done in this field so far, does not include a comprehensive analysis of the costs and losses associated with different configurations of the CHB inverter, e.g., the number of levels, selection of switches, etc. There are setups described with only three levels [21] and up to eleven [14,22], twenty-one [23,24] or even twenty-three levels [25,26] with a big majority focusing on seven level CHB inverters [8,[27][28][29][30][31][32]. Only one publication was found comparing different configurations, but only with regards to efficiency and without any cost consideration [33].…”

Section: Of 19mentioning

confidence: 99%

Optimization of a Cascaded H-Bridge Inverter for Electric Vehicle Applications Including Cost Consideration

et al. 2019

View full text Add to dashboard Cite

This paper presents a method to find the optimal configuration for an electric vehicle energy storage system using a cascaded H-bridge (CHB) inverter. CHB multilevel inverters enable a better utilization of the battery pack, because cells/modules with manufacturing tolerances in terms of capacity can be selectively discharged instead of being passively balanced by discharging them over resistors. The balancing algorithms have been investigated in many studies for the CHB topology. However, it has not yet been investigated to which extend a conventional pack can be modularized in a CHB configuration. Therefore, this paper explores different configurations by simulating different switch models, switch configurations, and number of levels for a CHB inverter along with a reference load model to find the optimal design of the system. The configuration is also considered from an economically point of view, as the most efficient solution might not be cost-effective to be installed in a common production vehicle. It is found that four modules per phase give the best compromise between efficiency and costs. Paralleling smaller switches should be preferred over the usage of fewer, larger switches. Moreover, selecting specific existing components results in higher savings compared to theoretical optimal components.

show abstract

“…When the conventional PS-PWM works under power match conditions, it is able to eliminate most harmonics by equally displacing the same shift angle, 2π/N, between consecutive modules [11], [12]. However, under power mismatch conditions, the conventional methods are no longer applicable.…”

Section: Introductionmentioning

confidence: 99%

“…The third type of method is different from the second type of method in that it is based on Fourier series of the pulses produced by each half-bridge [11], [12]. The values of shifted angles vary in every carrier period.…”

Section: Introductionmentioning

confidence: 99%

Modified Phase-Shifted PWM for Cascaded Half-Bridges of Photovoltaic Application

et al. 2020

View full text Add to dashboard Cite

Photovoltaic power plants are generally far away from loads such as cities and industrial zones. Moreover, long-distance power transmission for renewable energy will become an inevitable trend in the future. Cascaded dc-dc converters can reach a high voltage to collect and transport photovoltaic energy, with advantages such as lower costs and larger capacities. However, the input power mismatch may cause a large amount of switching harmonic components, resulting in dc-link voltage fluctuations, which will not only increase the volume of filter components, but also cause unreliable circuit breaker actions. To solve the aforementioned problems, a hierarchical phase-shifted pulse width modulation (HPS-PWM) is proposed. By rationally grouping and layering the modules, low-order harmonics generated by the switching process of the dc-dc converter can be eliminated. The fluctuation of dc-link voltage can be suppressed by HPS-PWM, according to simulation results. When the number of modules is 27 and 81, the weighted total harmonic distortion (WTHD) of the HPS-PWM method can be reduced by more than 60% compared to the phaseshifted tracking pulse width modulation (PST-PWM) and fault tolerant adaptive phase-shifted pulse width modulation (FTA-PS-PWM). Finally, experiments verify the performance of HPS-PWM, agreeing with the simulation results. INDEX TERMSPhotovoltaic systems, harmonic analysis, optical phase shifters, multiport circuits. NOMENCLATURE P pvk Power of PV panel k i pvk Current of PV panel k V dck DC-link voltage of capacitor k V G Voltage of HVDC bus i G Total current injected into HVDC bus nth harmonic Harmonic of the nth carrier multiple V n,k Voltage amplitude of nth harmonic of module k n,k

show abstract

Performance Comparison of Variable-Angle Phase-Shifting Carrier PWM Techniques

Cited by 29 publications

References 14 publications

Sampling-Time Harmonic Control for Cascaded H-Bridge Converters With Thermal Control

Sampling-Time Harmonic Control for Cascaded H-Bridge Converters With Thermal Control

Optimization of a Cascaded H-Bridge Inverter for Electric Vehicle Applications Including Cost Consideration

Modified Phase-Shifted PWM for Cascaded Half-Bridges of Photovoltaic Application

Contact Info

Product

Resources

About