scholarly journals Consideration of Standards and Recommendations for Selection, Installation and Maintenance of Substation Transformers_Final Draft_021120.docx

2020 ◽  
Author(s):  
David Durocher
Keyword(s):  
Power Systems ◽  
North American ◽  
Performance Testing ◽  
Field Testing ◽  
Operational Efficiency ◽  
Testing Installation

This paper will discuss the key applicable North American Standards defining performance, testing, installation and routine field maintenance of liquid-immersed distribution substation transformers. These transformers, typically applied in commercial and industrial power systems, can be installed either in outdoor or indoor locations, applied as remote or close-coupled to either primary or secondary switchgear, or both. Recommendations based on these standards for selection, installation and factory/field testing industry users should specify to maximize reliability, operational efficiency and safety will follow.

scholarly journals Consideration of Standards and Recommendations for Selection, Installation and Maintenance of Substation Transformers_Final Draft_021120.docx

2020 ◽  
Author(s):  
David Durocher
Keyword(s):  
Power Systems ◽  
North American ◽  
Performance Testing ◽  
Field Testing ◽  
Operational Efficiency ◽  
Testing Installation

This paper will discuss the key applicable North American Standards defining performance, testing, installation and routine field maintenance of liquid-immersed distribution substation transformers. These transformers, typically applied in commercial and industrial power systems, can be installed either in outdoor or indoor locations, applied as remote or close-coupled to either primary or secondary switchgear, or both. Recommendations based on these standards for selection, installation and factory/field testing industry users should specify to maximize reliability, operational efficiency and safety will follow.

scholarly journals Evolutionary Algorithms for Community Detection in Continental-Scale High-Voltage Transmission Grids

Symmetry ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 1472 ◽  
Author(s):  
Manuel Guerrero ◽  
Raul Baños ◽  
Consolación Gil ◽  
Francisco G. Montoya ◽  
Alfredo Alcayde
Keyword(s):  
Genetic Algorithm ◽  
Evolutionary Algorithms ◽  
Power Systems ◽  
Community Detection ◽  
North American ◽  
Flow Analysis ◽  
Power Grids ◽  
Improved Genetic Algorithm ◽  
Continental Scale ◽  
The North

Symmetry is a key concept in the study of power systems, not only because the admittance and Jacobian matrices used in power flow analysis are symmetrical, but because some previous studies have shown that in some real-world power grids there are complex symmetries. In order to investigate the topological characteristics of power grids, this paper proposes the use of evolutionary algorithms for community detection using modularity density measures on networks representing supergrids in order to discover densely connected structures. Two evolutionary approaches (generational genetic algorithm, GGA+, and modularity and improved genetic algorithm, MIGA) were applied. The results obtained in two large networks representing supergrids (European grid and North American grid) provide insights on both the structure of the supergrid and the topological differences between different regions. Numerical and graphical results show how these evolutionary approaches clearly outperform to the well-known Louvain modularity method. In particular, the average value of modularity obtained by GGA+ in the European grid was 0.815, while an average of 0.827 was reached in the North American grid. These results outperform those obtained by MIGA and Louvain methods (0.801 and 0.766 in the European grid and 0.813 and 0.798 in the North American grid, respectively).

North American and European Experience with Biological Toilets

1986 ◽  
Vol 18 (7-8) ◽  
pp. 95-102
Author(s):  
J. F. Kreissl
Keyword(s):  
North American ◽  
Specific Problem ◽  
Low Cost ◽  
Field Testing ◽  
European Experience ◽  
Early Use ◽  
Marketing Area ◽  
History Of ◽  
Human Wastes

A history of North American and European experience with biological toilets is provided. The early use of these devices in Scandanavia was to solve a specific problem, that of providing a low-cost solution for disposing of human wastes from recreational cabins. Because of their environmental attractiveness their popularity increased rapidly and their marketing area was widened to include year-round use. These same factors resulted in closer scrutiny by both Scandanavian and American agencies in the form of controlled and field testing programs. The results of these tests have been improved designs and understanding of the viable applications of these devices, which are significantly more limited than first implied.

Research on Portable Field-Testing Device of Infrared Thermal Imager Performance

2013 ◽  
Vol 823 ◽  
pp. 354-357
Author(s):  
Xiao Dan Gao
Keyword(s):  
Performance Test ◽  
Low Cost ◽  
Performance Testing ◽  
Field Testing ◽  
Infrared Light ◽  
Optical Parameters ◽  
Thermal Imager ◽  
Testing Device ◽  
Temperature Feedback ◽  
Infrared Thermal Imager

Performance test of infrared thermal imager is very significant for its working life and field maintenance, but available test equipment is huge volume, strict requirements for environment and user, high cost in use. According to the deficiency of field testing of infrared thermal imager performance, the method was put forward that using high precise temperature feedback controlled thermoelectric cooling module to instead expensive blackbody furnace. The techniques were adopted in the method such as infrared light signals simulation, optical-electric signals auto-detecting, image processing and the fusion of multi-detecting signals. The performance testing device of infrared thermal imager with low cost, convenient to field testing and maintenance was designed, the design broke the traditional model that the test of infrared thermal imager must be under the given condition, and the testing of electric and optical parameters should be separated. Keywords:infrared thermal imager; performance test; simulating infrared target; temperature feedback control

Development of Electric Bicycle Performance Testing Techniques and Adaptable Electric Bicycle Power System

2007 ◽  
Author(s):  
Richard V. Stackhouse ◽  
Zuomin Dong
Keyword(s):  
Power Systems ◽  
Power System ◽  
Standardized Testing ◽  
Internal Combustion Engines ◽  
Low Cost ◽  
Performance Testing ◽  
Combustion Engines ◽  
Testing Facility ◽  
Electric Bicycle ◽  
Electric Bicycles

Battery powered electric bicycles and scooters, replacing the heavily polluting scooters with two-cycle internal combustion engines, provide zero-emission transportation for many parts of the world. Annual global sales of electric bicycles have risen from 36,000 in 1993 to over 500,000 in 1999 and to multi-millions today. To facilitate the development of new electric bicycles, a computerized electric bicycle testing facility has been created. Standardized testing cycles for quantitatively measuring the performance of electric bicycles have been developed. Testing results of three representative electric bicycles using the newly introduced electric bicycle testing methods and testing facility are presented. The development of a low-cost, fully Adaptable Electric Bicycle Power System (AEBPS) designed to be quickly adapted to a regular bicycle is also presented. The AEBPS can be attached to a regular bicycle in less than ten minutes, and removed in under five minutes. Performance of a converted bicycle using the AEBPS is evaluated and compared with representative commercial electric bicycles. The work forms the foundation for systematically evaluating different electric bicycle designs and for carrying out design optimization of electric bicycle power systems suitable to different markets and needs.

Usability and Performance Testing of Hand-held Data-entry Devices for Navy Shipboard Damage Control and Fire-fighting Environments

1995 ◽  
Vol 39 (14) ◽  
pp. 967-967
Author(s):  
James W. Broyles ◽  
Michael Christie
Keyword(s):  
Damage Control ◽  
Data Entry ◽  
Performance Testing ◽  
Field Testing ◽  
Training Group ◽  
Lessons Learned ◽  
Fire Fighting ◽  
Cooperative Research ◽  
And Performance ◽  
Treasure Island

Portable, hand-held, data-entry devices were evaluated for intended use by shipboard engineering repair team personnel for improving on-scene casualty reporting of damage control and fire-fighting efforts. Current on-scene reporting methods use pre-formatted damage control messages, hand carried from the scene of the casualty to the repair lockers, and often rely on two-way radios for rapid transmission of critical casualty information. During the initial reporting period, this process is often confusing, time-late, and sometimes ambiguous or error-prone. Five off-the-shelf data entry devices were tested for usability and performance for data input and display of casualty information in a laboratory setting at the Naval Postgraduate School, Monterey, with follow-on field testing done by damage control and fire-fighting personnel assigned to Fleet Training Center, San Diego and Detachment Treasure Island and the Afloat Training Group, Pacific. Demonstration of these devices, lessons learned on usability testing and building of cooperative research networks between users and the training community will be described.

scholarly journals Application of Network Information Communication Technology in Power System

2018 ◽  
Vol 2 (6) ◽  
Author(s):  
Chuanpeng Liu
Keyword(s):  
Power Systems ◽  
Power System ◽  
Information Transmission ◽  
Communication Technology ◽  
Information Communication Technology ◽  
Operational Efficiency ◽  
Power Grids ◽  
Information Communication ◽  
Efficient Operation ◽  
Network Information

Abstract: Network information communication technology in power systems is the key to ensuring the safe and efficient operation of power grids. The network information communication technology itself has advantages in automation operation and information transmission, thus is widely applied to the power system. In the case of ensuring that the power system is compatible with the network information communication technology, the control of the power system can be strengthened, and the operational efficiency of the power system can be improved. This paper mainly analyzes the specific application of network information communication technology in power system.

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