A new multi-input step-up DC–DC converter for hybrid energy systems

Summary In this paper, a new extendable high step‐up multi‐input‐single‐output dc‐dc converter is presented. The proposed converter is composed based on the conventional boost converter and conventional buck‐boost converter. The benefits of the proposed converter consist of the simple control of each duty cycle and low‐voltage stress across the semiconductors. Therefore, conduction losses can be reduced by using the switch with lower resistance rDS(on). The presented converter is flexible to obtain the high power level with the proper selection of duty cycle values. Therefore, the presented converter is controllable in different power levels of input sides. In fact, the proposed converter supports the operation of multiple input sources without any changes in the structure of the topology. The dynamic modeling and efficient multivariable controller design with dynamic responses for the proposed converter are analyzed completely. To confirm the performance of the presented converter, mathematical analysis and simulation results are presented. In addition, the comparison between the presented converter and some other topologies is provided. In order to illustrate the efficient operation of the presented converter, a laboratory prototype for a 425 V/300 W with 40‐ and 45‐V input voltages and 95.62% efficiency is implemented.

Section: Comparison Studymentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

A multi‐input‐single‐output high step‐up DC‐DC converter with low‐voltage stress across semiconductors

Mohseni

Hosseini

Sabahi

et al. 2019

“…Utilizing multiconverters to manage the power between different sources, not only decreases the reliability but it also may reduce the efficiency . To overcome the aforementioned drawbacks, multi‐input converters (MICs) have been of paramount importance to researchers and engineers . The MICs provide a single structure with multiple degrees of freedom from control systems point of view.…”

Section: Introductionmentioning

confidence: 99%

“…Accordingly, to increase the reliability of supply systems, usually, a storage system is used to supply the power in the case that the PV extracted power is not enough. [5][6][7][8][9][10][11][12] In addition, the generated voltage by the commercial products is not as large as the required level for grid connected inverters. Accordingly the voltage gain of conventional boost converters is not as much as the required value.…”

Section: Introductionmentioning

confidence: 99%

“…6 To overcome the aforementioned drawbacks, multi-input converters (MICs) have been of paramount importance to researchers and engineers. 10 The MICs provide a single structure with multiple degrees of freedom from control systems point of view. 13,14 Nomenclature: D, Series diode of PV port; D 1 , Duty cycle of switches S 2 and S 4 ; D PV , Duty cycle in which PV supports power; D b , Duty cycle in which battery support power; L k , Leakage inductance of the secondary side of the inductor; L m , Magnetizing inductance of the secondary side of the inductor; n, Turn ratio of the coupled inductor; T s , Switching period;…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A bidirectional high step-up multi-input DC-DC converter with soft switching

KhademiAstaneh

Javidan

Valipour

et al. 2018

Summary With the advancement of technology in renewable energy resources, the researchers and engineers have been more interested in utilizing such energy resources in various types of applications. To utilize commercial loads, the produced energy should be transferred to a high voltage (HV) DC link. In this paper, a double input HV gain DC‐DC converter is proposed. The soft switching capability and bidirectional power flow are achieved in the proposed topology using a coupled inductor structure. Thanks to an improved switching strategy for different power flow modes, soft switching operation of four main switches is achieved in low voltage (LV) to HV power flow direction. In HV to LV power transfer, the soft switching of the half of switches still exists. Moreover, a HV gain is achieved due to utilizing the coupled inductor. To validate the operation of proposed converter in different operation modes, a laboratory prototype was tested, which its results is presented in the paper.

Integratedmulti‐input DC‐DCconverter with reduced switches

Dhananjaya

Pilla²,

Gorripotu³

2021

Summary Multi‐input converters (MICs) play an important role in integrating the independent energy sources utilized in the grid‐connected system and electric vehicle applications. In this scenario, several types of MICs are presented in the literature. Most of the MICs are operated using a time‐sharing scheme. This leads to a restricted duty cycle which limits the energy source utilization and output voltage. To overcome the above‐mentioned limitations, a multi‐input single‐output converter is proposed. The utilization of energy sources and output voltage can be improved with a reduction in the part count. A 400 W prototype is designed to check the feasibility of the proposed system, and the subsequent simulation and experimental results are validated.