A new nonisolated three-port DC-DC converter with high step-up/down ratio

The paper presents a high voltage conversion ratio DC-DC step-down topology obtained from a classical buck converter associated with an input switched-capacitor cell and an output switched-inductor cell. Analytical descriptions, the voltage and current limits of the main components are synthesized in a comparative form, related to the classical buck structure, in order to emphasis the advantages of the proposed converter. Digital simulations and experimental results obtained with a built prototype are compared. From the first evaluation, the proposed converter is expected to be effectively used at input to output voltage ratios higher than 20.

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“…New configurations are proposed also for multi-input DC-DC converters with high step-up/down voltage conversion ratio [6,7].…”

Section: Introductionmentioning

confidence: 99%

High voltage conversion ratio, switched C & L cells, step-down DC-DC converter

Pelan

Muntean

Cornea

et al. 2013

2013 IEEE Energy Conversion Congress and Exposition

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“…It is also reported in the literature that the utilization of coupled inductors is relatively better than using the transformers, since the winding structure of the coupled inductors is simpler and the conduction losses is less [66]. Although some work about this research topic has been carried out by a small group of researchers, most of them have used the same technique, which is the coupled-inductor circuit [19][20][21][22][23][24]. Therefore, some work can be conducted in developing new non-isolated three-port DC-DC converters with high voltage gain using the voltage gain extension cells that have been successfully applied in the two-port DC-DC converters.…”

Section: High-gain Non-isolated Three-port Convertersmentioning

confidence: 99%

“…11 The converter proposed in [18]. A new three-port DC-DC converter with a high voltage conversion ratio is proposed and analysed in [19] and [20] as shown in Fig. 12.…”

Section: Reported Three-port Dc-dc Convertersmentioning

confidence: 99%

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A review of topologies of three-port DC–DC converters for the integration of renewable energy and energy storage system

Zhang

Sutanto

Muttaqi

2016

Renewable and Sustainable Energy Reviews

194

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The application of renewable energy such as solar photovoltaic (PV), wind and fuel cells is becoming increasingly popular because of the environmental awareness and advances in technology coupled with decreasing manufacturing cost. Power electronic converters are usually used to convert the power from the renewable sources to match the load demand and grid requirement to improve the dynamic and steady-state characteristics of these green generation systems, to provide the maximum power point tracking (MPPT) control, and to integrate the energy storage system to solve the challenge of the intermittent nature of the renewable energy and the unpredictability of the load demand. In order to improve the efficiency and the power density of the overall circuit, the use of a three-port DC-DC converter, which includes a DC input port for the renewable source, a bidirectional DC input port for the energy storage system, and a DC output port for supplying the load, is a preferable solution to the traditional method using two DC-DC converters: one for the renewable sources and another for the energy storage system. In recent years, many DC-DC three-port converters have been proposed and reported in the literature. Each of these converters has its own topology and operating principle, which results in different complexities, different numbers of components, different reliability and efficiency. In this paper, a comparison of the features of different topologies of three-port DC-DC converters that have been proposed by different research groups is reviewed briefly. This review can be used as a guide for the appropriate selection of the suitable topology to meet the particular requirement of a system. The paper also discusses the potential research extension of the topologies from three-port DC-DC converters to three-port DC-AC inverters and how the voltage gain of the non-isolated three-port DC-DC converter can be improved. A Review of Topologies of Three-Port DC-DC Converters for the Integration of Renewable Energy and Energy Storage SystemNeng Zhang, Danny Sutanto, and Kashem M. Muttaqi School of Electrical, Computer and Telecommunications Engineering, University of Wollongong, New South Wales 2522, AustraliaAbstract: The application of renewable energy such as solar photovoltaic (PV), wind and fuel cells is becoming increasingly popular because of the environmental awareness and advances in technology coupled with decreasing manufacturing cost. Power electronic converters are usually used to convert the power from the renewable sources to match the load demand and grid requirement to improve the dynamic and steady-state characteristics of these green generation systems, to provide the maximum power point tracking (MPPT) control, and to integrate the energy storage system to solve the challenge of the intermittent nature of the renewable energy and the unpredictability of the load demand. In order to improve the efficiency and the power density of the overall circuit, the use of a three-port DC-DC converter, which ...

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“…For example, [2] [3] connected several boost converters at the input side, [4] [5] connected several buck converters at the input side, [6] [7] utilized several buck boost converters, and [8] [9] utilized several Z-source converters. There are also some work combining different basic converters together to form the multiple-input converter [10] [11]. However, if the nonisolated topologies are implemented at dc side, a bulky and expensive line frequency transformer is needed at ac side.…”

Section: Introductionmentioning

confidence: 99%

A dual-input full-bridge current-source isolated DC/DC converter based on Quasi-Switched-Capacitor circuit for Photovoltaic systems with energy storage

Guo

et al. 2015

2015 IEEE Applied Power Electronics Conference and Exposition (APEC)

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In this paper, a dual-input full-bridge currentsource isolated dc/dc converter is proposed to combine the Photovoltaic (PV) system with the Energy Storage System (ESS). The proposed converter utilizes a full-bridge as the primary side, and the Quasi-Switched-Capacitor circuit as the secondary side. Compared to other multiple-input dc/dc converters with galvanic isolation function, the proposed converter utilizes less number of switches and passive components, reduces voltage stress on switches, and can achieve a high efficiency at a high switching frequency. The operation principle of the converter is presented, and a power sharing strategy between two input sources is proposed. A 2.0 kW, 1 MHz, 40 V/ 400 V prototype utilizing Gallium Nitride (GaN) switching devices is built in the lab, and experimental results show that a peak efficiency of 95.9% is achieved at 500 kHz.

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A new nonisolated three-port DC-DC converter with high step-up/down ratio

Cited by 9 publications

References 8 publications

High voltage conversion ratio, switched C & L cells, step-down DC-DC converter

High voltage conversion ratio, switched C & L cells, step-down DC-DC converter

A review of topologies of three-port DC–DC converters for the integration of renewable energy and energy storage system

A dual-input full-bridge current-source isolated DC/DC converter based on Quasi-Switched-Capacitor circuit for Photovoltaic systems with energy storage

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A new nonisolated three-port DC-DC converter with high step-up/down ratio

Cited by 9 publications

References 8 publications

High voltage conversion ratio, switched C &amp; L cells, step-down DC-DC converter

High voltage conversion ratio, switched C &amp; L cells, step-down DC-DC converter

A review of topologies of three-port DC–DC converters for the integration of renewable energy and energy storage system

A dual-input full-bridge current-source isolated DC/DC converter based on Quasi-Switched-Capacitor circuit for Photovoltaic systems with energy storage

Contact Info

Product

Resources

About

High voltage conversion ratio, switched C & L cells, step-down DC-DC converter

High voltage conversion ratio, switched C & L cells, step-down DC-DC converter