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Power transfer capacity improvements of existing overhead line systems

K. Kopsidas, S. M. Rowland, M. N. R. Baharom, I. Cotton
2010 2010 IEEE International Symposium on Electrical Insulation  
Such methods involve re-tensioning, reconductoring, or modifying the tower design to utilize composite cross-arms.  ...  It is hypothesized that a composite cross-arm and a novel conductor together provide an insulating significant opportunity to increase the overhead line voltage.  ...  It allows voltage uprating to 400 kV without infringing the required clearances to the tower and ground that dominate the design. II.  ... 
doi:10.1109/elinsl.2010.5549755 fatcat:2majro4fcbcl5ktwvfldn7xcja

3D electric field computation of a composite cross-arm

V. Peesapati, C. Zachariades, Q. Li, S. M. Rowland, I. Cotton, F Allison, D. Chambers
2012 2012 IEEE International Symposium on Electrical Insulation  
The use of composite insulators for overhead transmission lines has increased in the past decade. Various designs and models are now available for a wide range of voltages.  ...  The present paper will evaluate the electric fields on such a composite cross-arm, in regards to the areas of high field enhancement.  ...  The authors would like to acknowledge the support of Scottish and Southern Energy, National Grid and EPL Composites in the above work.  ... 
doi:10.1109/elinsl.2012.6251511 fatcat:scpoynk3o5grtf4cyna4q6aaoa

A coastal trial facility for high voltage composite cross-arms

C. Zachariades, I. Cotton, S. M. Rowland, V. Peesapati, P.R. Green, D. Chambers, M. Queen
2012 2012 IEEE International Symposium on Electrical Insulation  
A 400 kV transformer energizes two crossarms installed on a lattice tower oriented at 90 o from each other.  ...  A trial site has been developed within a substation on the North East coast of Scotland for electrical testing high voltage composite cross-arms.  ...  The compaction of dimensions can also make the towers less obtrusive in the surrounding environment [1] . A novel composite cross-arm for overhead lines of up to 400 kV has been developed.  ... 
doi:10.1109/elinsl.2012.6251430 fatcat:nkskdrpmwvgknmn3bz7qnisnim

Electric field and electromagnetic environment analyses of a 500 kV composite cross arm

Gao Yanfeng, Wu Chao, Liang Xidong, Liu Yingyan, Wang Guoli, Gao Chao
2015 2015 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)  
The electric field distribution as well as the electromagentic environment of composite cross arm deserves a detailed and in-depth study to verify its performance.  ...  Calculation results indicated that by using proper metal hardware, composite cross arm could obtain a relatively suitable distribution of electric field and potential.  ...  In this paper, the electric field and electromagnetic envrionment analyses of a 500 kV composite cross arm are presented with the aim of obtaining a better understanding of the electric performance of  ... 
doi:10.1109/ceidp.2015.7352045 fatcat:ll2vl2532jfcxirdv4g6ecj2pu

Wind-Induced Clearances Infringement of Overhead Power Lines

Ali I. El Gayar, Zulkurnain Abdul-Malek, Ibtihal Fawzi El-Shami
2014 International Journal of Computer and Electrical Engineering  
This paper presents a methodical approach, suggestions and information to design 400 kV transmission lines, check which types of towers, conductors and insulators are suitable to use based on wind velocity  ...  The purpose of this paper is to determine the clearances necessary for a 400 kV line to withstand high wind velocity, and ensure that conductors have to maintain the clearances under lightning, switching  ...  The L12 tower is a new model for delivering energy at 400 kV. A twin bundle of 700 mm² AAAC is preferred for use. The tower is designed to ensure sufficient electrical clearances.  ... 
doi:10.7763/ijcee.2014.v6.838 fatcat:tidzm2yvg5h37flgxat2gcshxy

Electric Field and Potential Distribution in a 420 kV Novel Unibody Composite Cross-Arm

Tohid Jahangiri, Claus Leth Bak, Faria Da Silva, Brian Endahl
2017 Proceedings of the Nordic Insulation Symposium  
<p>The use of uni-body composite cross-arm in a fully composite-based pylon is a new concept for the next generation of overhead transmission lines.  ...  Due to a major difference between the novel cross-arm structure and traditional composite cross-arms, the electric field distribution in the uni-body composite cross-arm is of considerable interest.  ...  ACKNOWLEDGMENTS The authors thank the Danish Research Council (Innovationsfonden) for the financial support of the PoPyFu project.  ... 
doi:10.5324/nordis.v0i24.2294 fatcat:ozcfovjcenddbar7xu7s5e3u6y

Problems of 220-kv. power transmission

A. E. Silver
1919 Proceedings of the American Institute of Electrical Engineers  
The economic and technical considerations underlying design of a 220-kv. system are outlined, and general designs are devel oped for a typical 220-kv. transmission line.  ...  OF PAPER The dependence of industrial progress upon an adequate supply of electrical power, together with the vital need for a rational policy of conservation of the country's fuel resources, points to  ...  400 400 400 200 200 200 200 800 800 800 800 8,300 9,500 10,000 11,200 11,200 12,800 13,500 15,100 Design Stresses (Same for Towers Types C.  ... 
doi:10.1109/paiee.1919.6590889 fatcat:eatnnfofxnchzmt3d47l5nvvw4

Electric field computation for a 400 kV composite cross-arm

V. Peesapati, C. Zachariades, Q. Li, S. M. Rowland, I. Cotton, F Allison, D. Chambers, P. Rhodes
2012 2012 Annual Report Conference on Electrical Insulation and Dielectric Phenomena  
The present paper reviews the use of FEA simulation to design stress relief devices across the high voltage end of a composite insulating cross-arm.  ...  If not well designed, high voltage composite insulators are prone to ageing and failure due to corona and electric field stress.  ...  The novel grading ring designed using FEA methods reduces the field around the end connections and also provides effective stress relief to all four ends of the cross-arm.  ... 
doi:10.1109/ceidp.2012.6378899 fatcat:diauter5v5atbn32el323kalge

Network composite insulators for overhead lines: disconnecting due to unidentified reasons

M K Yarmarkin, S A Ivanov
2019 IOP Conference Series: Materials Science and Engineering  
The characteristics of disconnecting overhead transmission lines 110-400 kV due to unidentified reasons (DUR) are under consideration.  ...  An explanation of DUR associated with settling the web on line insulation during mass migration of spiders.  ...  It is possible that for the 110 kV overhead lines should be chosen towers a greater height, as primary web stream moves through the air at low altitudes.  ... 
doi:10.1088/1757-899x/643/1/012053 fatcat:zw3p7yunp5aidgtel46zbagi3e

Development of Electric-Field Stress Control Devices for a 132 kV Insulating Cross-Arm Using Finite-Element Analysis

Christos Zachariades, Simon M. Rowland, Ian Cotton, Vidyadhar Peesapati, David Chambers
2016 IEEE Transactions on Power Delivery  
The process of designing and verifying the performance of electric field grading devices is reported for rigid cross-arms on a 132 kV lattice tower.  ...  Finite element analysis (FEA) simulations show that the electric field magnitude at the triple junctions of the insulating members meet the design criteria of 3.5 kV/cm.  ...  Many people contributed to making this design a reality: Special thanks to Frank Allison, Peter Rhodes, Alistair MacLeod and John Baker for their contributions on the way.  ... 
doi:10.1109/tpwrd.2015.2499795 fatcat:pevgvqldtzhfdhrgczez22oy5i

A Study on the Environmental Effects of Compact Tower in Transmission Line
송전철탑 Compact화에 따른 전기환경 영향 연구

2010 Journal of the Korean Institute of Electrical and Electronic Material Engineers  
This paper presents the design factor of a compact tower to meet the environmental interference standard.  ...  Therefor, there is a need for compact tower that can be built on a narrow right-of-way. the compact tower with polymer insulation arm is a solution.  ...  Calculated result of electric field.  ... 
doi:10.4313/jkem.2010.23.8.645 fatcat:jxc4bxcuxbfj3dh72hzhbcszsm

Determination of voltage stress in case of operation of a hybrid HVAC/HVDC transmission line

Dennis Woodford, Lionel Barthold, Liliana Oprea, Stefan Ullrich, Andreas Fuchs
2016 Electric power systems research  
voltage was 400 kV).  ...  /cm for 400 kV operation.  ... 
doi:10.1016/j.epsr.2016.04.011 fatcat:5dbrv7yarfhtbk52wudo2m7csq

Transmission Line Restoration Using ERS Structure

Sushri Mukherjee, Sumana Chattaraj, Md. Irfan Khan, Dharmbir Prasad, Pradip Barua, Harish Agarwal
2019 Advances in Science, Technology and Engineering Systems  
Successful execution of this project resolved a 400 kV transmission line hindrance between Atur and Indira Puram since March 2017 and was likely to remain idle due to a 132 kV single circuit transmission  ...  In this article, a case study of 132 kV restorations is described as a conceptual proof of concepts.  ...  Acknowledgement The project shown as a case study was done for UPPTCL, India. Authors are thankful to Mr. Arup Das (SCPL) and Mr. Prakash Reddy (SCPL) for their active co-operation.  ... 
doi:10.25046/aj040551 fatcat:f7cezemkefa6xoatwfc22xlt34

Seismic Vulnerability Assessment of Site-Vicinity Infrastructure for Supporting the Accident Management of a Nuclear Power Plant

T. J. Katona, A. Vilimi
2017 Science and Technology of Nuclear Installations  
In this paper the main qualitative findings of a study are presented that have been performed for the case of a hypothetical 10−4/a probability design basis earthquake for the Paks Nuclear Power Plant,  ...  Nuclear power plants shall be designed to resist the effects of large earthquakes.  ...  Conflicts of Interest The authors declare that there are no conflicts of interest regarding the publication of this paper.  ... 
doi:10.1155/2017/2929353 fatcat:qlyfz66ij5cohpmvegmqgq4lae

Problems of 220-kv. Power Transmission

A. E. Silver
1919 Transactions of the American Institute of Electrical Engineers  
OF PAPER The dependence of industrial progress upon an adequate supply of electrical power, together with the vital need for a rational policy of conservation of the country's fuel resources, points to  ...  Two hundred and twenty kv. is suggested as a logical voltage for such high-capacity, long-distance transmission,  ...  The tower design studies which follow are based upon a series of five SIDE VIEW 47 FT.TOWER jflE FIG. 14-220-KV.  ... 
doi:10.1109/t-aiee.1919.4765632 fatcat:6ffek6ahnncfpljqqtxy5cjtvy
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