Journal ArticleDOI
Novel High Step-Up DC–DC Converter for Distributed Generation System
TLDR
A novel high step-up dc-dc converter for distributed generation systems is proposed, to utilize two capacitors and one coupled inductor to achieve a highstep-up voltage gain and the voltage stress on the main switch is reduced.Abstract:
In this paper, a novel high step-up dc-dc converter for distributed generation systems is proposed. The concept is to utilize two capacitors and one coupled inductor. The two capacitors are charged in parallel during the switch-off period and are discharged in series during the switch-on period by the energy stored in the coupled inductor to achieve a high step-up voltage gain. In addition, the leakage-inductor energy of the coupled inductor is recycled with a passive clamp circuit. Thus, the voltage stress on the main switch is reduced. The switch with low resistance RDS(ON) can be adopted to reduce the conduction loss. In addition, the reverse-recovery problem of the diodes is alleviated, and thus, the efficiency can be further improved. The operating principle and steady-state analyses are discussed in detail. Finally, a prototype circuit with 24-V input voltage, 400-V output voltage, and 200-W output power is implemented in the laboratory to verify the performance of the proposed converter.read more
Citations
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Journal ArticleDOI
Step-Up DC–DC Converters: A Comprehensive Review of Voltage-Boosting Techniques, Topologies, and Applications
TL;DR: In this paper, the authors comprehensively review and classify various step-up dc-dc converters based on their characteristics and voltage-boosting techniques, and discuss the advantages and disadvantages of these voltage boosting techniques and associated converters.
Journal ArticleDOI
Optimal Protection Coordination for Microgrids With Grid-Connected and Islanded Capability
TL;DR: A microgrid protection scheme that relies on optimally sizing fault current limiters and optimally setting directional overcurrent relays is proposed, and is tested on two medium-voltage networks.
Journal ArticleDOI
Nonisolated High Step-Up DC–DC Converters Adopting Switched-Capacitor Cell
Gang Wu,Xinbo Ruan,Zhihong Ye +2 more
TL;DR: 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.
Journal ArticleDOI
A Novel High Step-up DC/DC Converter Based on Integrating Coupled Inductor and Switched-Capacitor Techniques for Renewable Energy Applications
TL;DR: In this paper, a novel high step-up dc/dc converter is presented for renewable energy applications, which consists of a coupled inductor and two voltage multiplier cells, in order to obtain high step up voltage gain.
References
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Switched-Capacitor/Switched-Inductor Structures for Getting Transformerless Hybrid DC–DC PWM Converters
TL;DR: The superiority of the new, hybrid converters is mainly based on less energy in the magnetic field, leading to saving in the size and cost of the inductors, and less current stresses in the switching elements, lead to smaller conduction losses.
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Adaptive Decentralized Droop Controller to Preserve Power Sharing Stability of Paralleled Inverters in Distributed Generation Microgrids
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An Accurate Power Control Strategy for Power-Electronics-Interfaced Distributed Generation Units Operating in a Low-Voltage Multibus Microgrid
Yun Wei Li,Ching-Nan Kao +1 more
TL;DR: In this article, a power control strategy for a low-voltage microgrid is proposed, where the mainly resistive line impedance, the unequal impedance among distributed generation (DG) units, and the microgrid load locations make the conventional frequency and voltage droop method unpractical.
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.
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