scholarly journals A Novel Submodule Applied in HVDC Hybrid DC Breaker Topology

2018 ◽  
Vol 64 ◽  
pp. 04003 ◽  
Author(s):  
Wu Junmin ◽  
Zhang Xizi ◽  
Li Cui ◽  
Zhang Jun ◽  
Zhao Zhibin
Keyword(s):  
Renewable Energy Sources ◽  
Circuit Breaker ◽  
Energy Utilization ◽  
Utilization Efficiency ◽  
Dc System ◽  
Electrical Stress ◽  
Solar Energy Utilization ◽  
Dc Circuit Breaker ◽  
New Type ◽  
Dc Breaker

In recent years, with the vigorous development of power electronic technology, renewable energy sources such as wind power and solar energy utilization efficiency continuing to improve, and the application scale expanding unceasingly, DC power grid technology and the development of multiterminal HVDC has become a key link of transmission technology in our country. As the key equipment of biulding DC system, The direct current breaker need to be optimized on the aspect of topology, to promote the development of dc transmission. This article puts forward a new type of submodule which can be applicated in hybrid DC breaker. After a brief review of DC circuit breaker research status, the paper will give the topology structure, and analyzes its working principle. Then, verification and electrical stress calculation will be done in Saber Sketch simulation. Based on this, two other present scheme will be introduced, and finally a comparison will be made between the diffent scheme. As is concluded, the novel submodule can save the power elctronic device cost effectively

Nanowire-based zinc-doped tin oxide microtubes for enhanced solar energy utilization efficiency

2017 ◽  
Vol 43 (9) ◽  
pp. 6822-6830 ◽  
Author(s):  
Wutao Mao ◽  
Zhengdao Li ◽  
Keyan Bao ◽  
Kaijun Zhang ◽  
Weibo Wang ◽  
...  
Keyword(s):  
Solar Energy ◽  
Tin Oxide ◽  
Energy Utilization ◽  
Utilization Efficiency ◽  
Solar Energy Utilization

Photocatalytic decomposition of benzene enhanced by the heating effect of light: improving solar energy utilization with photothermocatalytic synergy

2017 ◽  
Vol 7 (15) ◽  
pp. 3303-3311 ◽  
Author(s):  
Jialin Fang ◽  
Zhangsen Chen ◽  
Qun Zheng ◽  
Danzhen Li
Keyword(s):  
Solar Energy ◽  
Energy Utilization ◽  
Utilization Efficiency ◽  
Photocatalytic Decomposition ◽  
Heating Effect ◽  
Solar Energy Utilization ◽  
Effect Of Light

In the present paper, we propose to use the heating effect of light to enhance the solar utilization efficiency of the catalyst Pt/BiVO4/TiO2.

Analysis on Measurement and Comparison of Various Vegetation Canopy LAI in Seacoast Wetland, South China

2011 ◽  
Vol 179-180 ◽  
pp. 1130-1135
Author(s):  
Wen Hong Yan ◽  
Jin Jin Ouyang
Keyword(s):  
Scientific Basis ◽  
Energy Utilization ◽  
Utilization Efficiency ◽  
Vegetation Canopy ◽  
Area Index ◽  
Gap Fraction ◽  
Solar Energy Utilization ◽  
Radiation Transmission ◽  
Water Recycle ◽  
Study Characteristics

Data of LAI(Leaf Area Index) are needed to study characteristics of photosynthesis and evaporation by canopy of plant community. The indirect method—Imaging Digital Canopy, based on “gap-fraction” process, was described in this paper. By study in various communities about 9 measuring spots, it showed characteristics of community such as LAI, radiation transmission, extinction coefficient. LAI of Vatica hainanensis forest was measured according to height of community in different developing stage. The technique to minimize error about the Digital Plant Canopy Imager CI110 was mentioned. It was discussed that LAI of Vatica hainanensis forest was lower than that of typical rainforest. It also certified that LAI of seashore rain forest was lower than that of typical mountain rainforest. And LAI correlation of various vegetations was also mentioned. The result should supply scientific basis to study on air environmental effects of tropical seashore vegetation, especially in O2/CO2exchange, water recycle and water-lose, solar energy utilization efficiency.

scholarly journals Driving and Influencing Factors of Biomass Energy Utilization from the Perspective of Farmers

2021 ◽  
Vol 39 (1) ◽  
pp. 269-274
Author(s):  
Minghao Liu ◽  
Zhaoyong Sun ◽  
Qian Li ◽  
Zheng Wei ◽  
Baorui Liang
Keyword(s):  
Renewable Energy ◽  
Influencing Factors ◽  
Rural Areas ◽  
Renewable Energy Sources ◽  
Living Environment ◽  
Biomass Energy ◽  
Energy Utilization ◽  
Utilization Efficiency ◽  
Energy Sources ◽  
Energy Structure

Biomass energy is one of the most important renewable energy sources. Full utilization of this energy helps to optimize agricultural development, improve our living environment, and replace some non-renewable energy sources, thereby promoting the eco-environment across the country. However, biomass energy has not been extensively utilized in rural areas of China. Many farmers are not very enthusiastic about the use of biomass energy. Many scholars have tried to boost the willingness of farmers to utilize biomass energy. Therefore, this paper collects the relevant data from six aspects, namely, environmental factor, cost factor, income factor, behavior factor, policy factor, and personal factor, and constructs a binary logistic regression model. On this basis, the driving and influencing factors of biomass energy utilization were empirically analyzed from the perspective of farmers. The results show that the development of biomass energy is mainly affected by the farmers’ awareness of national energy strategy, the relevant costs of biomass utilization, and the attitude of family members and village committee. The research provides an important reference for further promotion of biomass energy, elevation of its utilization efficiency, and optimization of energy structure in rural China.

scholarly journals Analysis of the DC Fault Current Limiting Characteristics of a DC Superconducting Fault Current Limiter Using a Transformer

Energies ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 4210
Author(s):  
Kang-Cheol Cho ◽  
Min-Ki Park ◽  
Sung-Hun Lim
Keyword(s):  
Circuit Breaker ◽  
Fault Current ◽  
Fault Current Limiter ◽  
Long Distance ◽  
Superconducting Fault Current Limiter ◽  
Dc System ◽  
Dc Fault ◽  
Current Limiting ◽  
New Type ◽  
Current Limiter

Recently, a lot of interesting research has been conducted to solve the fault current problem of the DC system. In long-distance transmission, DC transmission is more economical than AC transmission. The connection of power grids with a DC system can also better control the power flow and provide high stability. However, the control of the fault current in a DC system is more difficult to handle than in an AC system because the DC system does not make a zero point, unlike the AC system. In addition, there is a disadvantage, in that an arc occurs when a circuit breaker operates. In this paper, a new type of DC superconducting fault current limiter (SFCL) is proposed. This new type of SFCL is composed of two superconducting elements, a current limiting resistor/reactor (CLR), and a transformer. With the proposed SFCL, the DC fault current limiting experiments were performed and the DC fault current limiting characteristics of this SFCL due to the component of the CLR were analyzed.

scholarly journals Design and analysis of an off-grid PV plant for higher utilization efficiency in the field of pharmaceutical industry considering global pandemic state .

2021 ◽  
Vol 20 (1) ◽  
pp. 47-58
Author(s):  
A.B.M. Khalid Hassan ◽  
Kazi Firoz Ahmed
Keyword(s):  
Machine Learning ◽  
Solar Energy ◽  
Solar Power ◽  
Machine Learning Algorithms ◽  
Energy Utilization ◽  
Utilization Efficiency ◽  
Automation System ◽  
Solar Pv ◽  
Data Logging ◽  
Solar Energy Utilization

According to the concern of WHO the less association of people in an office may restrict the likelihood of spreading this COVID-19 infection. And it applies to all kinds of organizations. On the other hand, the pharmaceutical companies are working hard to maintain uninterrupted production of vaccine and medicines. This paper focuses on the main layer which is the power system management and its utilization through the less involvement of any individual. Automation and controlling the system remotely can be a good solution. In the design process the FDA proposed structure for the Pharmaceuticals needs to be maintained as well. One of the significant necessities is most of the energy should come from environment friendly system and in Bangladesh sunlight-based energy is the best solution right now. Solar energy utilization efficiency can be increased using the data logging system and machine learning algorithms from that archived data. In this paper, a SCADA operated Off-Grid Solar PV Automation System has been proposed to increase the utilization efficiency. To predict solar power availability over time and perform efficient energy trafficking, the automation system will analyze previous data and perform situational awareness operations for uninterrupted solar power generation. The proposed automation system has been designed focusing on pharmaceutical manufacturing utilities. A comprehensive analysis of the proposed automation system for pharmaceuticals industry applications has also been presented in this paper. The continuous monitoring system for this Off-Grid Solar PV power generating unit preserves multiple data entries, which increases with time and subjected to energy trafficking. And this energy trafficking based on machine learning increases the overall solar energy utilization efficiency.

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