Advanced Single-Phase Nine-Level Converter for the Integration of Multiterminal DC Supplies

Ali, Ahmed; Sayed, Mahmoud A.; Mohamed, Essam E. M.; Azmy, Ahmed M.

doi:10.1109/jestpe.2018.2868734

Cited by 64 publications

(40 citation statements)

References 32 publications

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“…A comparative study is illustrated in this section based‐on different parameters such as the number of switches ( N S ), the number of components per level ( N C/L ), and the average number of switches per pole ( N AVG/Pole ) as listed in Table 1 . The N C/L is calculated from, 33

N_{C / L} = \frac{N_{PS} + N_{S} + N_{D} + N_{C} + N_{T} + N_{X}}{N_{italicPole}}

where…”

Section: Comparative Studymentioning

confidence: 99%

“…Therefore, minimizing the switches number and control difficulty is an essential issue for practical operation 25 . Many modified families of MLIs, considering a lower number of switching devices, have been recently proposed 5,19,20,26‐40 . In Ref.…”

Section: Introductionmentioning

confidence: 99%

“…In Ref. 33, a simple MLI is proposed which is suitable for low, as well as, high‐voltage‐level operation. In Ref.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A single‐phase modular multilevel inverter based on controlled DC‐cells under two SPWM techniques for renewable energy applications

Ali

Sayed

Takeshita

et al. 2020

Int Trans Electr Energ Syst

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N_{C / L} = \frac{N_{PS} + N_{S} + N_{D} + N_{C} + N_{T} + N_{X}}{N_{italicPole}}

where…”

Section: Comparative Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A single‐phase modular multilevel inverter based on controlled DC‐cells under two SPWM techniques for renewable energy applications

Ali

Sayed

Takeshita

et al. 2020

Int Trans Electr Energ Syst

Self Cite

View full text Add to dashboard Cite

“…With the deepening of the research, researchers have proposed a variety of multilevel topology based on the structure of traditional multilevel converters [8], [9], [10]. In order to optimize the size of the converter and reduce the conduction losses.…”

Section: Introductionmentioning

confidence: 99%

“…In [9], a multilevel converter structure based on a developing switched-capacitor technology is proposed to reduce the number of components and dc sources. In [10], a new symmetrical single-phase nine-level structure is proposed to reduce the number of switches. These structures can produce more levels with fewer components.…”

Section: Introductionmentioning

confidence: 99%

AC Voltage Sensorless-Based Natural Frame Control of Cascaded H-Bridge Converter Based on Virtual Flux Observer

Yang

Chen

et al. 2020

IEEE Access

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In this study, a novel natural frame control method without AC voltage sensors is proposed for single-phase cascaded H-bridge (CHB) multilevel converter and implemented in the three-cell CHB converter platform. An improved virtual flux observer (VFO) is introduced to convert the estimated AC voltage signal into the virtual flux (VF) signal and then to vectorize it. The relationship between the instantaneous power and flux linkage is used to achieve independent control of the active and reactive currents. Compared with the conventional single-phase dq control, phase-locked loop (PLL) and coordinate transformation are unnecessary for natural frame control. Furthermore, only orthogonal voltages are required in the proposed control scheme, thus eliminating the time delay caused by constructing orthogonal current signals to improve dynamic performance. The simplification of the entire system is achieved by the omission of AC voltage sensors, the PLL, and coordinate transformations without deteriorating the steadystate and dynamic performances of the entire system. Simulation and experimental results verify the effectiveness of proposed control method. INDEX TERMS Cascaded H-bridge (CHB), natural frame control, sensorless control, virtual flux observer (VFO).

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A novel fault‐detection methodology of proposed reduced switch MLI fed induction motor drive using discrete wavelet transforms

Mohamed

Sekhar

2021

Int Trans Electr Energ Syst

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Summary Induction motors are typically promoted in industrial applications by adopting energy‐efficient power‐electronic drive technology. Multilevel inverters (MLI) have been widely recognized in recent days for high‐power, medium‐voltage‐efficient drives. There has been vital interest in forming novel multilevel inverters with reduced switching elements. The newly proposed reduced‐switch five‐level inverter topology extends with fewer switches, low dv/dt stress, high efficiency, and so on, over the formal multilevel inverter topologies. The multilevel inverter's reputation is greatly affected due to several faults on switching elements and complex switching sequences. In this paper, a novel fault identification process is evaluated in both healthy and faulty conditions using discrete‐wavelet transform analysis. The discrete wavelet transform utilizes the multi‐resolution analysis with a feature extraction methodology acquired for fault identification over the classical methods. A novel fault identification scheme is implemented on reduced‐switch five‐level MLI topology using the Matlab/Simulink platform to increase the drive system's reliability. The effectiveness of simulation outcomes is illustrated with proper comparisons. The proposed topology's hardware model is implemented using a dSPACE DS1103 real‐time digital controller and the results of the experiment are presented.

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Advanced Single-Phase Nine-Level Converter for the Integration of Multiterminal DC Supplies

Cited by 64 publications

References 32 publications

A single‐phase modular multilevel inverter based on controlled DC‐cells under two SPWM techniques for renewable energy applications

A single‐phase modular multilevel inverter based on controlled DC‐cells under two SPWM techniques for renewable energy applications

AC Voltage Sensorless-Based Natural Frame Control of Cascaded H-Bridge Converter Based on Virtual Flux Observer

A novel fault‐detection methodology of proposed reduced switch MLI fed induction motor drive using discrete wavelet transforms

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