|
|
|
| ANSYS Based Analysis on Short-Circuit Force and Mechanical Stress of Cleats for High Voltage Large Cross-Sectional Cables |
| Liu Hangyu1,Liu Nian1,Pu Lijuan1,You Shiliang2,Wu Hao2,Li Juan1 |
1.College of Electrical Engineering & Information Technology Sichuan University Chengdu 610065 China;
2.Sichuan Electric Power Design & Consulting Co.LTD Chengdu 610016 China |
|
|
|
|
Abstract Based on transient short-circuit current calculation methods and finite element method (FEM),the calculation process of the short-circuit forces for high voltage large-sectional cables is analyzed.And the short-circuit forces calculation formula for cleats of high voltage large cross-sectional cable is gotten.Within the formula,the snake-like layout of the cable,the mediums cushion effect at the outer conductor,and the cable movement are taken into consideration.Moreover,the coefficients K1 and K2 are introduced to modify the expression of the cable cleat force caused by 50 Hz and 100 Hz frequencies respectively.The 3D finite element calculation model of the cable cleat system is established based on ANSYS.Then the effect of span spacing and phase spacing on the cable cleats stress field has been studied.At the same time,the 220 kV power cable transmission line between Shuang Qiaozi and Tao Xiang has also been calculated.As can be seen from the simulation results,the maximum value of the stress is in the middle of the bolt.So it is most easy to deform or be pulled apart.The span and phase spacing should satisfy the standard l≤2.7 m,0.28 m≤a≤0.30 m separately for 220 kV power cable transmission lines which are laid in parallel.
|
|
Received: 24 January 2015
Published: 16 March 2016
|
|
|
|
|
|
[1] Labridis D,Dokopoulos P.Finite element computation of eddy current losses in nonlinear ferromagnetic sheaths of three-phase power cables[J].IEEE Transactions on Magnetics,1994,30(4):1407-1415.
[2] Wang X,Wang C C,Wu K.An improved optimal design scheme for high voltage cable accessories[J].IEEE Transactions on Dielectrics and Electrical Insulation,2014,21(1):5-15.
[3] Ruger W.Mechanical short-circuit effects of single-core cables[J].IEEE Transactions on Power Delivery,1989,4(1):68-74.
[4] BS EN 50368:Cable Cleats for Electrical Installations[S].British:European Standard,2003.
[5] Damell C A ,Bacon M L ,Shaw R A.Cable cleats-a global technique to protect three-phase single conductor cables during short-circuits[C]//Petroleum and Chemical Industry Technical Conference,Los Angeles,2004:143-150.
[6] Heinhold L.Power Cables and Their Application[M].Weinheim:Wiley-VCH,1990.
[7] Booth A W ,Hanekom A .Why correctly engineered cable cleats are vital for effective power system protection[C]//The 10th IET International Conference on Developments in Power System Protection,Manchester,2010:1-5.
[8] 冯金光,王士政.发电厂电气部分[M].北京:中国水利水电出版社,2002.
[9] Foulsham N ,Metcalfe J C ,Philbrick S E.Proposals for installation practice of single-core cables[J].Proceedings of the Institution of Electrical Engineers,1974,121(10):1168-1174.
[10]Attri N S,Edgar J N. On the response of bus bars on elastic supports subjected to a suddenly applied force[J].IEEE Transactions on Power Delivery,1967,86(5):636-650.
[11]金斯伯格.机械与结构振动:理论与应用[M].白化同,李俊宝,译.北京:中国宇航出版社,2005.
[12]Den Hartog J P.Mechanical Vibrations[M].New York:McGraw-Hill,1956.
[13]GB/T 1173—1995 铸造铝合金[S].北京:中国标准出版社,1995.
[14]GB/T 2518—2008 连续热镀锌钢板及钢带[S].北京:中国标准出版社,2008.
|
|
|
|
2016, Vol. 31 
