Optimum energy harvesting among distributed power sources with uniform voltage distribution

2012 ◽  
Author(s):  
K. Siri ◽  
M. Willhoff
Keyword(s):  
Energy Harvesting ◽  
Voltage Distribution ◽  
Power Sources ◽  
Distributed Power ◽  
Optimum Energy

Influence of distributed power supply in distributed power distribution network

2021 ◽  
pp. 1-8
Author(s):  
Xin Shen ◽  
Hongchun Shu ◽  
Min Cao ◽  
Nan Pan ◽  
Junbin Qian
Keyword(s):  
Power Supply ◽  
Power Distribution ◽  
Short Circuit ◽  
Power Grid ◽  
Distribution Network ◽  
Distribution Networks ◽  
Power Supplies ◽  
Power Distribution Network ◽  
Power Sources ◽  
Distributed Power

In distribution networks with distributed power supplies, distributed power supplies can also be used as backup power sources to support the grid. If a distribution network contains multiple distributed power sources, the distribution network becomes a complex power grid with multiple power supplies. When a short-circuit fault occurs at a certain point on the power distribution network, the size, direction and duration of the short-circuit current are no longer single due to the existence of distributed power, and will vary with the location and capacity of the distributed power supply system. The change, in turn, affects the current in the grid, resulting in the generation and propagation of additional current. This power grid of power electronics will cause problems such as excessive standard mis-operation, abnormal heating of the converter and component burnout, and communication system failure. It is of great and practical significance to study the influence of distributed power in distributed power distribution networks.

scholarly journals Effects of the Angled Blades of Extremely Small Wind Turbines on Energy Harvesting Performance

Mathematics ◽  
2020 ◽  
Vol 8 (8) ◽  
pp. 1295 ◽  
Author(s):  
Junseon Park ◽  
Seungjin Lee ◽  
Joong Yull Park
Keyword(s):  
Energy Harvesting ◽  
Wind Turbines ◽  
Load Resistance ◽  
Power Sources ◽  
Low Intensity ◽  
Basic Model ◽  
Computational Fluid Dynamics Analysis ◽  
Small Wind Turbines ◽  
Useful Power ◽  
Blade Geometry

Low-intensity winds can be useful power sources in the context of energy harvesting. This study aims to enhance the power generation capacity of a super micro wind turbine (SMWT) in low-intensity winds by modifying the blade geometry, which cannot be realized in conventional wind turbines owing to the stress concentration. By controlling the curved angle (θ) in the middle of the blade, the rotor performance can be improved, and the rotor diameter can be reduced to increase installation density. Experimental results indicated that the optimal θ value was 105°, at which the AC voltage was improved by 7.4% compared to that in the case of the basic model with θ = 0°. The maximum electric power output was 9.333 μW and the load resistance was 47.62 kΩ. Moreover, a computational fluid dynamics analysis was performed to clarify the pressure field and streamlines on and around the blade to demonstrate the aerodynamic performance of the SMWT. The proposed blade geometry is one of many possible designs that can enhance extremely small wind turbines for energy harvesting.

scholarly journals Hollow Piezoelectric Ceramic Fibers for Energy Harvesting Fabrics

2013 ◽  
Vol 8 (1) ◽  
pp. 155892501300800
Author(s):  
François M. Guillot ◽  
Haskell W. Beckham ◽  
Johannes Leisen
Keyword(s):  
Energy Harvesting ◽  
Lead Zirconate Titanate ◽  
Mechanical Energy ◽  
Electrical Power ◽  
Electrical Energy ◽  
Lead Zirconate ◽  
Ceramic Fibers ◽  
Power Sources ◽  
Electromechanical Performance ◽  
Alternative Power

In the past few years, the growing need for alternative power sources has generated considerable interest in the field of energy harvesting. A particularly exciting possibility within that field is the development of fabrics capable of harnessing mechanical energy and delivering electrical power to sensors and wearable devices. This study presents an evaluation of the electromechanical performance of hollow lead zirconate titanate (PZT) fibers as the basis for the construction of such fabrics. The fibers feature individual polymer claddings surrounding electrodes directly deposited onto both inside and outside ceramic surfaces. This configuration optimizes the amount of electrical energy available by placing the electrodes in direct contact with the surface of the material and by maximizing the active piezoelectric volume. Hollow fibers were electroded, encapsulated in a polymer cladding, poled and characterized in terms of their electromechanical properties. They were then glued to a vibrating cantilever beam equipped with a strain gauge, and their energy harvesting performance was measured. It was found that the fibers generated twice as much energy density as commercial state-of-the-art flexible composite sensors. Finally, the influence of the polymer cladding on the strain transmission to the fiber was evaluated. These fibers have the potential to be woven into fabrics that could harvest mechanical energy from the environment and could eventually be integrated into clothing.

Functional Materials for Wearable Sensing, Actuating and Energy Harvesting

2008 ◽  
Vol 57 ◽  
pp. 247-256 ◽  
Author(s):  
Danilo De Rossi ◽  
Federico Carpi ◽  
Fabia Galantini
Keyword(s):  
Energy Harvesting ◽  
Functional Materials ◽  
Wearable Devices ◽  
Electroactive Polymer ◽  
Electronic Textiles ◽  
Research Groups ◽  
Power Sources ◽  
Wearable Sensing ◽  
Potential Applicability ◽  
Biomedical Field

This paper describes the early conception and latest developments of electroactive polymer (EAP)- based sensors, actuators and power sources, implemented as wearable devices for smart electronic textiles (e-textiles). Such textiles, functioning as multifunctional wearable human interfaces, are today considered relevant promoters of progress and useful tools in several biomedical field, such as biomonitoring, rehabilitation and telemedicine. This paper presents the more performing EAPbased devices developed by our lab and other research groups for sensing, actuating and energy harvesting, with reference to their already demonstrated or potential applicability to electronic textiles.

Energy-harvesting power sources for gun-fired munitions

2011 ◽  
Author(s):  
J. Rastegar ◽  
R. Murray ◽  
C. Pereira ◽  
H.-L. Nguyen
Keyword(s):  
Energy Harvesting ◽  
Power Sources

scholarly journals A highly shape-adaptive, stretchable design based on conductive liquid for energy harvesting and self-powered biomechanical monitoring

2016 ◽  
Vol 2 (6) ◽  
pp. e1501624 ◽  
Author(s):  
Fang Yi ◽  
Xiaofeng Wang ◽  
Simiao Niu ◽  
Shengming Li ◽  
Yajiang Yin ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Three Dimensional ◽  
Power Source ◽  
Triboelectric Nanogenerator ◽  
Stretchable Electronics ◽  
Large Area ◽  
Conductive Liquid ◽  
Power Sources ◽  
Energy Harvesters ◽  
Self Powered

The rapid growth of deformable and stretchable electronics calls for a deformable and stretchable power source. We report a scalable approach for energy harvesters and self-powered sensors that can be highly deformable and stretchable. With conductive liquid contained in a polymer cover, a shape-adaptive triboelectric nanogenerator (saTENG) unit can effectively harvest energy in various working modes. The saTENG can maintain its performance under a strain of as large as 300%. The saTENG is so flexible that it can be conformed to any three-dimensional and curvilinear surface. We demonstrate applications of the saTENG as a wearable power source and self-powered sensor to monitor biomechanical motion. A bracelet-like saTENG worn on the wrist can light up more than 80 light-emitting diodes. Owing to the highly scalable manufacturing process, the saTENG can be easily applied for large-area energy harvesting. In addition, the saTENG can be extended to extract energy from mechanical motion using flowing water as the electrode. This approach provides a new prospect for deformable and stretchable power sources, as well as self-powered sensors, and has potential applications in various areas such as robotics, biomechanics, physiology, kinesiology, and entertainment.

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