A bidirectional non-isolated hybrid modular DC–DC converter with zero-voltage switching

Elserougi, Ahmed A.; Abdelsalam, Ibrahim; Massoud, Ahmed M.; Ahmed, Shehab

doi:10.1016/j.epsr.2018.11.009

Cited by 9 publications

(4 citation statements)

References 17 publications

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“…As a result, the number of general structure elements will decrease. So it will be relatively easier to provide soft switching in the resulting structure compared to two separate converters [34,35].…”

Section: Soft Switching In Multi-input Convertersmentioning

confidence: 99%

Analysis, design and implementation of a high step‐up multi‐port non‐isolated converter with coupled inductor and soft switching for photovoltaic applications

Taheri

Shahgholian

Mirtalaei

2022

IET Generation Trans & Dist

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In this paper, a new structure of a non‐isolated multi‐input converter is presented that is capable of generating high voltages to increase the efficiency of the converter, which uses a combination of a coupled inductor and a voltage multiplier cell. By combining these two methods, it is possible to use switches with low voltage stress and therefore low conductivity. This type of structure is suitable for photovoltaic (PV) applications. The proposed converter has two distinct phases for each input, which can be used to properly control the energy received from each source using two separate phases. The performance of the proposed converter depends on the charging or discharging mode of the energy storage system (ESS). To design a high step‐up non‐isolated multi‐input converter, first the structure and performance of the proposed converter are thoroughly investigated. The exact design method is presented for the correct operation of the converter and the simulation results for different modes of the converter operation are shown. Finally, in order to confirm the accuracy of the simulation results of the proposed converter, a laboratory sample of the proposed converter to supply a 400 W–400 V load is implemented and a comparison between the theoretical and practical results is performed.

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Section: Soft Switching In Multi-input Convertersmentioning

confidence: 99%

Analysis, design and implementation of a high step‐up multi‐port non‐isolated converter with coupled inductor and soft switching for photovoltaic applications

Taheri

Shahgholian

Mirtalaei

2022

IET Generation Trans & Dist

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“…The power stage diagram in Figure 1 is used for the conventional BDC, with the parameters equal to the discharge mode of the proposed BDC. The control system of the conventional BDC is a single loop PI controller [18,29] for the current control mode displayed in Figure 17a, and a dual-loop PI-based control [10] for the voltage control mode illustrated in Figure 17b. Table 3 presents all the parameters of conventional BDC.…”

Section: Conventional Bdc Controllermentioning

confidence: 99%

A Novel Bidirectional DC-DC Converter for Dynamic Performance Enhancement of Hybrid AC/DC Microgrid

Keshavarzi

Ali

2020

Electronics

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The conventional bidirectional DC-DC converter (BDC), which employs a half-bridge configuration, has some major disadvantages, including a controller designed for one direction with poor performance in the other direction, a bidirectional operation which does not have symmetrical voltage gain resulting in asymmetrical operation, and step-up and step-down switches that are simultaneously modulated, thereby increasing switching losses. To overcome these drawbacks, this paper proposes a new, nonisolated, DC-DC converter for the bidirectional power flow of battery energy storage applications in DC and hybrid microgrids (HMGs). The proposed converter uses two back-to-back Boost converters with two battery voltage levels, which eliminates step-down operation to obtain symmetric gains and dynamics in both directions. In discharge mode, two battery sections are in parallel connection at a voltage level lower than the grid voltage. In charge mode, two battery sections are in series connection at a voltage level higher than the grid voltage. Simulations demonstrate the efficacy of the proposed converter in the MATALB\Simulink environment. The results show that the proposed converter has promising performance compared to that of the conventional type. Moreover, the novel converter adds no complexity to the control system and does not incur considerable power loss or capital cost.

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“…But at the same time, due to the leakage inductance the problem related to EMI and resonance is severe in these types of converters. ZVS and ZCS can be used along with the implementation of coupled inductors to improve the adverse effects of leakage inductance (21,32). Sometimes, multilevel boost techniques are also adopted along with coupled inductor technique to achieve high gain (19,20).…”

Section: Introductionmentioning

confidence: 99%

Modular Ultra-High Gain Non-Isolated DC-DC Converter for DC Microgrid Integrated with Fuel Cell

Tewari¹,

Gurjar²,

Sachhidanand³

et al. 2022

ECS Trans.

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In recent years, DC microgrid integrated with energy sources like solar PV, fuel cell, and batteries receives tremendous attention due to the depleting fossil fuel reserves, massive urge to reduce carbon footprint, and initiatives for decentralized power distribution policy. It is essential to connect an intermediate DC-DC converter between these low voltage sources and grid. This paper presents an ultra-high gain non-isolated DC-DC converter for DC microgrid system integrated with fuel cell. This converter is developed by judicially combining both switched inductor (SI) and switched capacitor (SC) techniques as gain extension network. Integration of these techniques in the adopted circuit for ultra-high voltage gain evolves into a hybrid modular structure with extendable gain options. This paper includes circuit diagram, operation, design procedure, and results of the proposed hybrid SI-SC (HSISC) converter. Results available from the hardware model of 380V/200W validate the performance of the converter at an efficiency of 92.23%.

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A bidirectional non-isolated hybrid modular DC–DC converter with zero-voltage switching

Cited by 9 publications

References 17 publications

Analysis, design and implementation of a high step‐up multi‐port non‐isolated converter with coupled inductor and soft switching for photovoltaic applications

Analysis, design and implementation of a high step‐up multi‐port non‐isolated converter with coupled inductor and soft switching for photovoltaic applications

A Novel Bidirectional DC-DC Converter for Dynamic Performance Enhancement of Hybrid AC/DC Microgrid

Modular Ultra-High Gain Non-Isolated DC-DC Converter for DC Microgrid Integrated with Fuel Cell

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