Medium-Voltage Cascaded Sequential Topology for Large-Scale PV Plants

Lumbreras, David; Barrios, Ernesto L.; Balda, Julian; Navarrete, M.I.; Gonzalez, R. Reina; Sanchis, Pablo

doi:10.1109/access.2021.3113618

Cited by 5 publications

(2 citation statements)

References 25 publications

(80 reference statements)

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“…Several research papers considered the design and the control of modular and cascaded configurations instead of the conventional back-to-back converter in different RESs including PV and WTs [68][69][70][71][72][73][74][75][76][77][78][79][80]. Taking the large-scale PV (LSPV) systems, for example, modular converters emerged as a promising candidate where the power conversion stage is formed from several submodules (SMs) instead of one bulky centralized power converter.…”

Section: Modular and Cascaded Configurationsmentioning

confidence: 99%

A Review on Power Electronic Topologies and Control for Wave Energy Converters

Darwish

Aggidis

2022

Energies

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Ocean energy systems (OESs) convert the kinetic, potential, and thermal energy from oceans and seas to electricity. These systems are broadly classified into tidal, wave, thermal, and current marine systems. If fully utilized, the OESs can supply the planet with the required electricity demand as they are capable of generating approximately 2 TW of energy. The wave energy converter (WEC) systems capture the kinetic and potential energy in the waves using suitable mechanical energy capturers such as turbines and paddles. The energy density in the ocean waves is in the range of tens of kilowatts per square meter, which makes them a very attractive energy source due to the high predictability and low variability when compared with other renewable sources. Because the final objective of any renewable energy source (RES), including the WECs, is to produce electricity, the energy capturer of the WEC systems is coupled with an electrical generator, which is controlled then by power electronic converters to generate the electrical power and inject the output current into the utility AC grid. The power electronic converters used in other RESs such as photovoltaics and wind systems have been progressing significantly in the last decade, which improved the energy harvesting process, which can benefit the WECs. In this context, this paper reviews the main power converter architectures used in the present WEC systems to aid in the development of these systems and provide a useful background for researchers in this area.

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Section: Modular and Cascaded Configurationsmentioning

confidence: 99%

A Review on Power Electronic Topologies and Control for Wave Energy Converters

Darwish

Aggidis

2022

Energies

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“…Due to their modular structure, they can generate large voltages, by increasing the number of modules, ranging from many hundreds of kV to the MV level if needed. They have a high fault tolerance and require low capacitances for balancing [12]. However, their main problem is the lack of galvanic isolation and the circulation of leakage currents which poses risks to the PV arrays and raises safety concerns [13].…”

Section: Introductionmentioning

confidence: 99%

Dual Isolated Multilevel Modular Inverter with Novel Switching and Voltage Stress Suppression

Alotaibi

Darwish

2022

Energies

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This paper presents an improved structure for the submodules (SMs) in the three-phase modular inverter (TPMI) based on a dual isolated SEPIC/CUK (DISC) converter for large-scale photovoltaic (LSPV) plants. The DISC SMs can offer several advantages, including increased efficiency, reduced passive elements, and galvanic isolation via compact-size high-frequency transformers. The SMs can also provide a wide range for the output voltage and draw continuous currents with low ripples from the input source. However, the high dv/dt value across the switches during hard switching can cause current oscillations and voltage spikes, which will impair the operation of complementary switches and affect the safety of the power devices. For this challenge, the DISC SM is improved by replacing the output switches with diodes and adding a bypassing switch. In comparison to the conventional DISC SM, the improved DISC SM reduces the switch’s voltage spikes; hence, it can increase the overall efficiency. Thus, the DISC SM’s will be able to suppress voltage spikes in the TPMI inverter and therefore the total reliability will be improved. The work will detail the analysis of the proposed system along with design guidelines. Additionally, the simulation and experimental results to validate the operation of proposed DISC SM are presented using MATLAB/SIMULINK as well as a scaled-down experimental prototype.

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