Journal ArticleDOI
Nonisolated High Step-Up DC–DC Converters Adopting Switched-Capacitor Cell
Gang Wu,Xinbo Ruan,Zhihong Ye +2 more
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TLDR
To integrate the advantages of the high voltage gain of a switched-capacitor (SC) converter and excellent output regulation of a switching-mode dc-dc converter, a method of combining the two types of converters is proposed in this paper.Abstract:
In a photovoltaic (PV)- or fuel-cell-based grid-connected power system, a high step-up dc-dc converter is required to boost the low voltage of a PV or fuel cell to a relatively high bus voltage for the downstream dc-ac grid-connected inverter. To integrate the advantages of the high voltage gain of a switched-capacitor (SC) converter and excellent output regulation of a switching-mode dc-dc converter, a method of combining the two types of converters is proposed in this paper. The basic idea is that when the switch is turned on, the inductor is charged, and the capacitors are connected in series to supply the load, and when the switch is turned off, the inductor releases energy to charge multiple capacitors in parallel, whose voltages are controlled by a pulsewidth modulation technique. Thus, a high voltage gain of the dc-dc converter can be obtained with good regulation. Based on this principle, a series of new topologies are derived, and the operating principles and voltage gains of the proposed converters are analyzed. Finally, the design of the proposed converter is given, and the experiment results are provided to verify the theoretical analysis.read more
Citations
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Journal ArticleDOI
A High-Voltage-Gain DC–DC Converter Based on Modified Dickson Charge Pump Voltage Multiplier
TL;DR: In this paper, a high-voltage gain dc-dc converter is introduced, which resembles a two-phase interleaved boost converter on its input side while having a Dickson-charge-pump-based voltage multiplier (VM) on its output side.
Journal ArticleDOI
Bidirectional Power Flow Control in a DC Microgrid Through a Switched-Capacitor Cell Hybrid DC–DC Converter
TL;DR: Analysis of the converter operation and the stability in the step-up and step-down operating modes through the state-space averaging method and through the pulse width modulation switch model method applied on an equivalent circuit model proves that the controller is able to track the reference current waveform with good dynamic performance.
Journal ArticleDOI
Switched-Capacitor-Based Dual-Switch High-Boost DC–DC Converter
TL;DR: In this article, a switched-capacitor-based dual-switch dc-dc converter with a high-boost voltage gain is proposed, which can obtain a highvoltage gain with a small duty cycle, which decreases the voltage stress and the conduction loss on the power switches.
Journal ArticleDOI
Extended Switched-Boost DC-DC Converters Adopting Switched-Capacitor/Switched-Inductor Cells for High Step-up Conversion
TL;DR: In this paper, the authors proposed a switched-boost dc-dc converter for high stepup voltage conversion applications, such as renewable energy power generation, uninterruptible power supply, and automobile high-intensity discharge headlamps.
Journal ArticleDOI
DC–DC Boost Converter With a Wide Input Range and High Voltage Gain for Fuel Cell Vehicles
TL;DR: In this paper, a dc-dc boost converter with a wide input range and high voltage gain is proposed to act as the required power interface, which reduces voltage stress across the power devices and operates with an acceptable conversion efficiency.
References
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Journal ArticleDOI
Review of Nonisolated High-Step-Up DC/DC Converters in Photovoltaic Grid-Connected Applications
Wuhua Li,Xiangning He +1 more
TL;DR: A general conceptual circuit for high-step-up, low-cost, and high-efficiency dc/dc conversion is proposed to derive the next-generation topologies for the PV grid-connected power system.
Journal ArticleDOI
High-efficiency, high step-up DC-DC converters
Qun Zhao,Fred C. Lee +1 more
TL;DR: In this article, a family of high-efficiency, high step-up DC-DC converters with simple topologies is proposed, which use diodes and coupled windings instead of active switches to realize functions similar to those of active clamps.
Journal ArticleDOI
Voltage Multiplier Cells Applied to Non-Isolated DC–DC Converters
TL;DR: In this article, the use of the voltage multiplier technique applied to the classical non-isolated dc-dc converters in order to obtain high step-up static gain, reduction of the maximum switch voltage, zero current switching turn-on was introduced.
Journal ArticleDOI
Electrical PV Array Reconfiguration Strategy for Energy Extraction Improvement in Grid-Connected PV Systems
Guillermo Velasco-Quesada,F. Guinjoan-Gispert,R. Pique-Lopez,Manuel Román-Lumbreras,Alfonso Conesa-Roca +4 more
TL;DR: A dynamical electrical array reconfiguration strategy is applied on the photovoltaic generator of a grid-connected PV system based on a plant-oriented configuration in order to improve its energy production when the operating conditions of the solar panels are different.
Journal ArticleDOI
Review and Comparison of Step-Up Transformerless Topologies for Photovoltaic AC-Module Application
TL;DR: In this article, a comprehensive review of step-up single-phase non-isolated inverters suitable for ac-module applications is presented, where the selected solutions are designed and simulated complying with the benchmark obtaining passive and semiconductor components ratings.
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