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Your search keyword '"sustainable energy system"' showing total 3 results
Start Over Descriptor "sustainable energy system" Publisher ieee
3 results on '"sustainable energy system"'

1. High Step-Up Converter Based on Coupling Inductor and Bootstrap Capacitors With Active Clamping.

Author

Hwu, K. I. and Yau, Y. T.

Subjects
*ELECTRIC inductors, *CAPACITORS, *DC-AC converters, *CLAMPING circuits, *STATISTICAL bootstrapping, *ELECTRICAL load, *POWER electronics
Abstract

As generally acknowledged, the high step-up dc-dc converter is widely used in the sustainable energy system as the front-end stage of the dc-ac converter. Therefore, a high step-up converter combining one coupling inductor and two bootstrap capacitors, together with the active voltage-clamping circuit which pumps portion of the leakage inductance energy to the output, is presented herein. By doing so, the efficiency at light load can be upgraded greatly, and hence tends to be flat between the minimum load and the rated load. In this letter, the basic operating principles of this converter are first illustrated in detail, and second some experimental results are provided to demonstrate the effectiveness of the proposed high step-up converter topology. [ABSTRACT FROM AUTHOR]

Published
2014
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2. Novel High Step-Up DC–DC Converter With Coupled-Inductor and Switched-Capacitor Techniques for a Sustainable Energy System.

Author

Yi-Ping Hsieh, Jiann-Fuh Chen, Tsorng-Juu Liang, and Lung-Sheng Yang

Subjects
*DC-to-DC converters, *ELECTRIC inductors, *CAPACITOR switching, *SUSTAINABILITY, *ELECTRIC circuits
Abstract

In this paper, a novel high step-up dc-dc converter is proposed for a sustainable energy system. The proposed converter uses coupled-inductor and switched-capacitor techniques. The capacitors are charged in parallel and discharged in series by the coupled inductor to achieve high step-up voltage gain with an appropriate duty ratio. Besides, the voltage stress on the main switch is reduced with a passive clamp circuit; low on-state resistance Rds(on) of the main switch can be adopted to reduce the conduction loss. In addition, the reverse-recovery problem of the diode is alleviated by a coupled inductor. Thus, the efficiency can be further improved. The operating principle and steady-state analyses of voltage gain 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. [ABSTRACT FROM AUTHOR]

Published
2011
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3. Fuel-efficiency of hydrogen and heat storage technologies for integration of fluctuating renewable energy sources

Author

Brian Vad Mathiesen and Henrik Lund

Subjects
Engineering, Wind power, Waste management, Power station, energy storage, business.industry, electrochemical process, power generation auxiliary, fuell cell, renewable energy, Energy storage, Renewable energy, power system modelling, Cogeneration, Stand-alone power system, sustainable energy system, Electricity generation, hydrolysis, electrolysis, wind power generation, business, Process engineering, Electricity retailing, energy
Abstract

This paper presents the methodology and results of analysing the use of different energy storage technologies in the task of integration of fluctuating renewable energy sources (RES) into the electricity supply. The analysis is done on the complete electricity system including renewable energy sources as well as power plants and CHP (Combined heat and power production). Emphasis is put on the need for ancillary services. Devices to store electricity as well as devices to store heat can be used to help the integration of fluctuating sources. Electricity storage tech- nologies can be used to relocate electricity production directly from the sources, while heat storage devices can be used to relo- cate the electricity production from CHP plants and hereby im- prove the ability to integrate RES. The analyses are done by ad- vanced computer modelling and the results are given as diagrams showing the system ability to integrate RES inputs between 0 and 100 percent of the electricity demand. This paper presents the methodology and results of analysing the use of different energy storage technologies in the task of integration of fluctuating renewable energy sources (RES) into the electricity supply. The analysis is done on the complete electricity system including renewable energy sources as well as power plants and CHP (Combined heat and power production). Emphasis is put on the need for ancillary services. Devices to store electricity as well as devices to store heat can be used to help the integration of fluctuating sources. Electricity storage technologies can be used to relocate electricity production directly from the sources, while heat storage devices can be used to relocate the electricity production from CHP plants and hereby improve the ability to integrate RES. The analyses are done by advanced computer modelling and the results are given as diagrams showing the system ability to integrate RES inputs between 0 and 100 percent of the electricity demand.

Published
2005
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