Three phase modular multilevel inverter-based multi-terminal asymmetrical DC inputs for renewable energy applications

Ahmed, Taiea A.; Mohamed, Essam E. M.; Youssef, Abdel‐Raheem; Ibrahim, Asmaa; Saeed, Mahmoud S. R.; Ali, Ahmed

doi:10.1016/j.jestch.2019.11.003

Cited by 22 publications

(12 citation statements)

References 35 publications

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“…In fact, multilevel inverters offer the advantage of reducing the voltage constraints applied to power semiconductors, which allows these inverters to be able to transfer higher powers with dv/dt and di/dt much lower than those obtained with two or three level inverters [2]- [4]. Also, multilevel inverters allow reducing electromagnetic interference (EMI) and total harmonic distortion (THD) of the output signals, which allows to reduce the size of the output filter [5]- [7]. Certainly, multilevel inverters also have some disadvantages such as: the number of semiconductors and/or voltage sources (isolated or not) necessary for the operation of these inverters, which increases with the required number of voltage levels [6], [8].…”

Section: Introductionmentioning

confidence: 99%

Modified T-type topology of three-phase multi-level inverter for photovoltaic systems

Ouchatti¹,

Majdoul²,

Moutabir³

et al. 2022

IJECE

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In this article, a three-phase multilevel neutral-point-clamped inverter with a modified t-type structure of switches is proposed. A pulse width modulation (PWM) scheme of the proposed inverter is also developed. The proposed topology of the multilevel inverter has the advantage of being simple, on the one hand since it does contain only semiconductors in reduced number (corresponding to the number of required voltage levels), and no other components such as switching or flying capacitors, and on the other hand, the control scheme is much simpler and more suitable for variable frequency and voltage control. The performances of this inverter are analyzed through simulations carried out in the MATLAB/Simulink environment on a three-phase inverter with 9 levels. In all simulations, the proposed topology is connected with R-load or RL-load without any output filter.

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Section: Introductionmentioning

confidence: 99%

Modified T-type topology of three-phase multi-level inverter for photovoltaic systems

Ouchatti¹,

Majdoul²,

Moutabir³

et al. 2022

IJECE

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“…The solar photovoltaic (PV) system is considered one of the most popular RESs, while hydrogen fuel cells (FCs) are gaining popularity. However, the output voltage generated by both PV units or FCs is lower than the desired voltage level for the integration with the main grid through voltage source inverters [1,2]. One solution for achieving the desired voltage level is to use multiple PV cells or FCs in series in which several cells might be shaded and become reverse biased, i.e., working as a load rather than a source.…”

Section: Introductionmentioning

confidence: 99%

A High Step-Up Switched Z-Source Converter (HS-SZC) with Minimal Components Count for Enhancing Voltage Gain

et al. 2021

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Some applications such as fuel cells or photovoltaic panels offer low output voltage, and it is essential to boost this voltage before connecting to the grid through an inverter. The Z-network converter can be used for the DC-DC conversion to enhance the output voltage of renewable energy sources. However, boosting capabilities of traditional Z-network boost converters are limited, and the utilization of higher parts count makes it bulky and expensive. In this paper, an efficient, high step-up, switched Z-source DC-DC boost converter (HS-SZC) is presented, which offers a higher boost factor at a smaller duty ratio and avoids the instability due to the saturation of inductors. In the proposed converter, the higher voltage gain is achieved by using one inductor and switch at the back end of the conventional Z-source DC-DC converter (ZSC). The idea is to utilize the output capacitor for filtering and charging and discharging loops. Moreover, the proposed converter offers a wider range of load capacity, thus minimizing the power losses and enhancing efficiency. This study simplifies the structure of conventional Z-source converters through the deployment of fewer components, and hence making it more cost-effective and highly efficient, compared to other DC-DC boost converters. Furthermore, a comparison based on the boosting capability and number of components is provided, and the performance of the proposed design is analyzed with non-ideal elements. Finally, simulation and experimental studies are carried out to evaluate and validate the performance of the proposed converter.

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“…However, it increases the cost and the control ambiguity especially in grid‐tied applications 20 . In addition, the MLI design is mainly dependent on the number of switches, number of separate DC sources, power losses, DC link capacitors, and total blocking voltages 3,21‐24 . Therefore, minimizing the switches number and control difficulty is an essential issue for practical operation 25 .…”

Section: Introductionmentioning

confidence: 99%

“…In Ref. 21, a new developed modular MLI topology was proposed, which reduced the switches number without utilizing additional diodes/switches or capacitors. Therefore, the capacitors voltage balancing problem and control complexity are avoided.…”

Section: Introductionmentioning

confidence: 99%

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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Three phase modular multilevel inverter-based multi-terminal asymmetrical DC inputs for renewable energy applications

Cited by 22 publications

References 35 publications

Modified T-type topology of three-phase multi-level inverter for photovoltaic systems

Modified T-type topology of three-phase multi-level inverter for photovoltaic systems

A High Step-Up Switched Z-Source Converter (HS-SZC) with Minimal Components Count for Enhancing Voltage Gain

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

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