High step‐up single switch quadratic modified SEPIC converter for DC microgrid applications

Maroti, Pandav Kiran; Esmaeili, Shahrzad; Iqbal, Atif; Meraj, Mohammad

doi:10.1049/iet-pel.2020.0147

Cited by 30 publications

(20 citation statements)

References 36 publications

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“…Likewise, matrix converters have limited voltage boost ability, which are not good choice for very high voltage drops compensation [6]. Over recent years, different impedance source networks have been introduced for the DC-DC, DC-AC, AC-DC, AC-AC conversions [7][8][9][10]. For the ac-ac cases, the three-phase impedance source converters have offered high voltage gain ranges and high efficient AC-AC conversion, current filtering, and frequency controlling for the renewable energy systems [11,12].…”

Section: Introductionmentioning

confidence: 99%

A Trans-Inverse Magnetic Coupling Single-Phase AC-AC Converter

et al. 2022

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This paper introduces a new single-phase AC-AC converter based on an impedance source circuit. Like the existing single-phase impedance source AC-AC converters, it has the buck-boost ability and direct ac conversion. The input and output voltage possesses the same ground, and the phase angle is maintained and reversed smoothly. The presented converter utilizes a coupled transformer which allows the designer to exploit the transformer’s turns ratio as a variable to attain the desired output voltage. Additionally, the used transformer provides an option to obtain higher voltage gain by decreasing the turns ratio. Hence, smaller size of the coupled inductors is required for the higher voltage cases. To eliminate the switching voltage and current spikes on the power switches, a safe commutation strategy is used instead of utilizing snubber circuits. Furthermore, the input current is continuous and sinusoidal with low harmonics thanks to embedding the input inductor in series with the input source. Additionally, a dynamic voltage restorer is presented based on the proposed converter to compensate the voltage sag and swell faults. Simulation results are provided to evaluate the theoretical analysis. Finally, a laboratory prototype has been fabricated to demonstrate the validation of the presented converter.

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Section: Introductionmentioning

confidence: 99%

A Trans-Inverse Magnetic Coupling Single-Phase AC-AC Converter

et al. 2022

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“…The operation of the microgrid is possible in both grid-connected mode and islanding mode, where the most important matters are the system consistency and sustainability [3]. High voltage gain DC-DC converters are essential to step up and alleviate the low and variable DC voltages (12V-128V) obtained from the solar PV in DC microgrid system having the bus bar voltage up to 400 V DC [4]- [7]. High voltage gain DC-DC converters mainly provide a large conversion ratio, and high efficiency, and they are small in size [8].…”

Section: Introductionmentioning

confidence: 99%

A New High Gain Active Switched Network-Based Boost Converter for DC Microgrid Application

et al. 2021

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This paper deals with an active switched inductor network-based high gain boost converter.By using less number of components in circuit topology, a higher gain in voltage can be attained at a small duty cycle value by using the proposed converter, which helps in reducing the switch voltage stress and conduction loss. In addition, it draws continuous input current, has lower diode voltage stress, and lower passive component voltage ratings. The operating principles and key waveforms in Continuous Conduction Mode (CCM) and Discontinuous Conduction Mode (DCM) are presented. Parameter design, power loss calculation, characteristics, and comparative study with other non-isolated converters have been presented. Finally, a 200W hardware prototype is constructed and the viability of the proposed converter is verified through the experimentally obtained results.

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“…The authors in [24][25][26][27] are using a switched capacitor or switched inductor structure that it is inserted into the traditional SEPIC topology for increasing the step-up or step-down capabilities. In reference [43], it is shown that a quadratic SEPIC converter can be used in microgrid applications to obtain a high-voltage gain at a low-duty cycle and it exhibits a continuous input current, like in the classical transformerless SEPIC. Another structure with a reduced input current ripple and higher step-up capabilities is presented in [44].…”

Section: Introductionmentioning

confidence: 99%

A New SEPIC-Based DC-DC Converter with Coupled Inductors Suitable for High Step-Up Applications

2021

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In this paper, a new hybrid SEPIC dc-dc converter with coupled inductors suitable for photovoltaic applications is presented. First, how the new topology was derived will be presented, continuing with its analysis and design equation as a standalone dc-dc topology. The analysis will consist of a steady-state equations derivation, a static conversion ratio calculation based on which the semiconductor voltage and current stresses are evaluated and states the continuous conduction mode (CCM) operation conditions. The converter will then be simulated as a first validation of the theory using the dedicated Caspoc power electronics package. To finally validate the theoretical design, a prototype will be built in order to practically demonstrate the feasibility of the proposed solution and to reveal its main practical features and limitations. A comparative study to several other similar topologies will be carried out to identify its most desirable feature. Finally, an application of the new hybrid converter will consist of a complete solar energy conversion system using a photovoltaic panel. The maximum power point tracking (MPPT) algorithm will be elaborated. The solar system together with the MPPT will first be modeled, then simulated and practically implemented and tested.

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High step‐up single switch quadratic modified SEPIC converter for DC microgrid applications

Cited by 30 publications

References 36 publications

A Trans-Inverse Magnetic Coupling Single-Phase AC-AC Converter

A Trans-Inverse Magnetic Coupling Single-Phase AC-AC Converter

A New High Gain Active Switched Network-Based Boost Converter for DC Microgrid Application

A New SEPIC-Based DC-DC Converter with Coupled Inductors Suitable for High Step-Up Applications

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