A new partially isolated hybrid output of multiport multilevel converter for photovoltaic based power supplies

Rajan, Preethi; Jeevananthan, S.

doi:10.1016/j.est.2021.103436

Cited by 11 publications

(4 citation statements)

References 37 publications

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“…MMCs can be interfaced with the HVDC voltage level since IGBT ratings are in the kV level and HVDC rating is normally in hundreds of kV, commonly several hundred SMs are used for one MMC [17]. A type of multiport converter (MPC), to effectively utilize the sources, has been coined in recent decades [18]. In this topology, the seven-level inverter with simple half-bridge switches is providing multiple levels.…”

Section: Common Mode (Cm) Voltagementioning

confidence: 99%

An Alternative Level Enhanced Switching Angle Modulation Schemes for Cascaded H Bridge Multilevel Inverters

Paramasivan,

Eswaramoorthy,

Muniraj

et al. 2023

IEEE Access

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This paper suggests an alternate level enhancing algorithm to operate the nine-level cascaded multilevel inverter (CHBMLI) for a 31-level output, which involves an inventive selection of optimal asymmetrical voltage values in separate DC sources (SDCs) and a quarter-wave symmetry pulse pattern pulse width modulation (QSP-PWM). The symmetrical CHBMLI structure involves the same DCs with an objectionable value of component count, especially at higher level outputs; consequently, there is a need to reduce the component count. It can be supported largely by the optimal set of asymmetrical voltage values (say 1:2:4:8), such an actualization is quite easy with photovoltaic (PV) applications. Additionally, many of the commonly used PWM methods of MLI are tedious especially when it comes to the generation of pulses. This paper also engraves a straightforward switching strategy apposite to the developed MLI topology. In addition, three new switching angle modulation schemes have been proposed to get the optimum performance, namely, incremental delay switching angle modulation scheme, random delay switching angle modulation scheme and sine referencing-based switching angle modulation scheme. The preliminary study on the tenet of suggested topology is done theoretically, then the performance is analyzed in MATLAB2019a software and finally, experimentally corroborated on a proof-of-concept (POC) prototype with the aid of ModelSim6.3f hardware description language simulation environment, Xilinx 14.5 project navigator tool and XC3S500E field-programmable-gate-array processor. The tested results for the inductive load demonstrate the output voltage synthesizing and the total harmonic distortion curtailment savvies of the proposed MLI and the switching strategies.INDEX TERMS DC-AC power converters, harmonic analysis, modular multilevel converters, pulse width modulation inverters, total harmonic distortion.

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Section: Common Mode (Cm) Voltagementioning

confidence: 99%

An Alternative Level Enhanced Switching Angle Modulation Schemes for Cascaded H Bridge Multilevel Inverters

Paramasivan,

Eswaramoorthy,

Muniraj

et al. 2023

IEEE Access

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“…Several economic and political factors provide a stimulus for state actors to take concrete steps to increase energy interconnectivity and realize better energy security in the NEA. This section provides a brief discussion, exploring possible avenues to crystallize such cooperation (Rajan & Jeevananthan, 2022). We maintain, in effect, that because each country is dependent on the other for the demand or supply side of energy, strengthening ties among NEA countries will lead to a greater tendency to resolve differences and resolve disputes through consultation rather than confrontation or destructive competition.…”

Section: Clean Energy-based Regional Cooperation Mechanismmentioning

confidence: 99%

Mechanisms and challenges of renewable energy cooperation in Northeast Asia

Huaicun,

Yuna,

Kada

2023

Int. J. Multidiscipline. Approach. Research. Science.

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In recent decades, sustainable economic growth has caused an increase in energy consumption in North Asia, especially in China, Japan and South Korea. However, internal supply cannot meet energy demand, bringing two related consequences: First, the enlargement of the gap between production and consumption leads to dependence on external energy sources. Second, forcing the government to map its energy policy. However, unlike other regions such as the European Union and the Association of Southeast Asian nations, the dependence of the Energy of Northeast Asia has not caused the closest intra-regional cooperation. Conversely, in some cases, it damages cooperation and worsens non -constructive competition. Therefore, in this study, we aim to highlight the problematic relationship between energy securitization and regional energy cooperation in Northeast Asia and provide an analysis of the reasons, mechanisms and challenges for regional cooperation led by energy. In this case, we think that, by exploiting regional compatibility in the generation of renewable energy and in the consumer model, building a mechanism of integration and multimodal communication will promote greater integration and contribute to filling the gap between securitization and energy cooperation in the east and work the same in the east and working with Asia.

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“…Multi-level inverters have eliminated the desired disadvantages. In addition, the voltage and power range of multi-level inverters is higher than two-level inverters [3][4][5][6]. In general, PV units are divided into two categories connected to the network and separated from the network.…”

Section: Introductionmentioning

confidence: 99%

A hybrid scheme for optimal performance of photovoltaic system converters with multilayer structure

Zand

Nasab

Hanif

et al. 2022

The Journal of Engineering

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The interface of photovoltaic (PV) systems to the grid requires an efficient control strategy to operate, control, and improve power quality. The output voltage of the solar array, which may be accompanied by significant voltage variations, must be controlled and converted to a higher voltage for grid connection applications of photovoltaic system by a DC‐DC converter that commands more attention. Recently, due to the increasing use of renewable sources, multilayer structure with different structures and designs to provide power and stability has been researched because the output voltage of solar arrays is usually low, so it is increasing to DC‐to‐DC converters, needed with optimal interest and efficiency. In this paper, a method to improve the performance of DC–DC converter used in PV system by using a combined design of forward and fly‐back is presented. Due to the fact that isolated converters, flyback, and forward converters have a simple structure and are easy to control, but this converter is affected by high stress voltage. Therefore, this converter cannot be used for high power applications. To solve this problem, it has been improved in the proposed converter with the overlay and triple induction technique, which is a very good improvement on the voltage gain parameters in the short duty cycle. The voltage drop across the semiconductor switch is reduced. The investigations performed that the proposed DC/DC converter in Simulink MATLAB has been simulated. The results show that the suggested converter has an ideal efficiency of roughly 82.86% and provided higher voltage gain, decreased voltage stress, and reduced voltage jumps caused by disconnection.

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A new partially isolated hybrid output of multiport multilevel converter for photovoltaic based power supplies

Cited by 11 publications

References 37 publications

An Alternative Level Enhanced Switching Angle Modulation Schemes for Cascaded H Bridge Multilevel Inverters

An Alternative Level Enhanced Switching Angle Modulation Schemes for Cascaded H Bridge Multilevel Inverters

Mechanisms and challenges of renewable energy cooperation in Northeast Asia

A hybrid scheme for optimal performance of photovoltaic system converters with multilayer structure

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