全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

电感效应与火花效应对接地体及其周围土壤雷电冲击特性的影响分析

DOI: 10.13336/j.1003-6520.hve.2015.01.008, PP. 56-62

Keywords: 水平接地体,冲击特性,电网络模型,电感效应,火花效应,归一化参数

Full-Text   Cite this paper   Add to My Lib

Abstract:

为研究电感效应、火花效应对接地体冲击特性的影响规律,区分2种效应占主导的影响范围,构建了接地体的电网络模型和考虑火花放电的迭代算法,并使用冲击大电流作用下的真型试验数据对上述模型、算法的有效性和准确性进行了验证。在此基础上,对不同波形冲击电流作用下不同长度水平接地体的冲击特性进行了仿真计算。结果表明随着土壤电阻率的增大,接地冲击特性呈现出由电感效应影响占主导逐渐转换为火花效应影响占主导;归纳得到归一化参数的临界值为450kA·Ω,可以以此定量区分电感效应影响占主导和火花效应影响占主导的范围。所得结论对于优化设计伸长接地体和水平射线的长度具有指导意义。

References

[1]  Papalexopoulos A D, Meliopoulos A P. Frequency dependent characteristics of grounding systems[J]. IEEE Transactions on Power Delivery, 1987, 2(4): 1073-1081.
[2]  Menter F E, Grcev L. EMTP-based model for grounding system analysis[J]. IEEE Transactions on Power Delivery, 1994, 9(4): 1838-1849.
[3]  Nekhoul B, Labie P, Zgainski F X, et al . Calculating the impedance of a grounding system[J]. IEEE Transactions on Magnetics, 1996 , 32(3): 1509-1512.
[4]  Otero A F, Cidras J, Garrido C. Frequency analysis of grounding systems[C]∥8 th International Conference on Harmonics and Quality of Power. Athens, Greece: IEEE, 1998: 348-353.
[5]  Otero A F, Cidras J, Del Alamo J L. Frequency-dependent grounding system calculation by means of a conventional nodal analysis technique[J]. IEEE Transactions on Power Delivery, 1999, 14(3): 873-878.
[6]  张 波,余绍峰,孔维政,等. 接地装置雷电冲击特性的大电流试验分析[J]. 高电压技术,2011,37(3):548-554. ZHANG Bo, YU Shaofeng, KONG Weizheng, et al . Experimental analysis on impulse characteristics of grounding devices under high lightning current[J]. High Voltage Engineering, 2011, 37(3): 548-554.
[7]  司马文霞,雷超平,袁 涛,等. 改善冲击散流时地中电场分布的接地降阻试验[J]. 高电压技术,2011,37(9):2294-2301. SIMA Wenxia, LEI Chaoping,YUAN Tao, et al . Experimental study on grounding resistance reduction based on improved grounding electric field distribution induced by the diffuser of impulse current[J]. High Voltage Engineering, 2011, 37(9): 2294-2301.
[8]  Harid N, Ahmeda M, H Griffiths, et al . Experimental investigation of impulse characteristics of practical ground electrode systems[J]. High Voltage Engineering, 2011, 37(11): 2721-2726.
[9]  张 波,薛惠中,张宝全,等. 雷击风机时叶片和塔筒对接地装置冲击接地特性的影响[J]. 高电压技术,2012,38(10):2675-2682. ZHANG Bo, XUE Huizhong, ZHANG Baoquan, et al . Influence of the wind vane tower barrel on the earthing connection’s impulse earthing characteristics in a lightning shock[J]. High Voltage Engineering, 2012, 38(10): 2675-2682.
[10]  Mohamad N N, Hadda A, Griffiths H. Characteristics of ionization on phenomena in soils under fast impulse[J]. IEEE Transactions on Power Delivery, 2006, 21(1): 353-361.
[11]  Mghairbi A E, Ahmdeda M, Harid N, et al . Technique to increase the effective length of practical earth electrodes: simulation and field test results[J]. Electrical Power System Research, 2012, 31(50): 1-7.
[12]  Velazquez R, Mukhedkar D. Analytical modelling of grounding electrodes transient behavior[J]. IEEE Transactions on Power Apparatus and System, 1984, 103(6): 1314-1322.
[13]  Grcev L. Impulse efficiency of ground electrodes[J]. IEEE Transactions on Power Delivery, 2009, 24(1): 441-451.
[14]  Grcev L. Modeling of grounding electrodes under lightning currents[J]. IEEE Transactions on Electromagnetic Compatibility, 2009, 51(3): 559-571.
[15]  Grcev L. Time- and frequency- dependent lightning surge characteristics of grounding electrodes[J]. IEEE Transactions on Power Delivery, 2009, 24(4): 2186-2196.
[16]  Grcev L. Lightning surge efficiency of grounding grids[J]. IEEE Transactions on Power Delivery, 2011, 26(3): 1692-1699.
[17]  Visacro S, Rosado G. Response of grounding electrodes to impulse currents: an experimental evaluation[J]. IEEE Transactions on Electromagnetic Compatibility, 2009, 51(1): 161-164.
[18]  邓长征,杨迎建,童雪芳,等. 接地装置冲击特性研究分析[J]. 高电压技术,2012,38(9):1-8. DENG Changzheng, YANG Yingjian, TONG Xuefang, et al . Impulse characteristics analysis of grounding devices[J]. High Voltage Engineering, 2012, 38(9): 1-8.
[19]  吴 宁. 电网络分析与综合[M]. 北京:科学出版社,2003:73-74. WU Ning. Analysis and synthesize of electrical network[M]. Beijing, China: Science Press, 2003: 73-74.
[20]  邓长征,杨迎建,董晓辉,等. 接地装置冲击大电流试验系统的研制及杆塔接地冲击特性测试[J]. 高电压技术,2013,39(6): 1527-1535. DENG Changzheng, YANG Yingjian, DONG Xiaohui, et al . Development of impulse high current testing system of grounding devices and testing of tower grounding impulse characteristics[J]. High Voltage Engineering, 2013, 39(6): 1527-1535.
[21]  DL/T621—1997 交流电气装置的接地[S],1997. DL/T621—1997 Grounding of AC electrical installation [S], 1997.
[22]  Mousa A M. The soil ionization gradient associated with discharge of high currents in concentrated electrodes[J]. IEEE Transactions on Power Delivery, 1994, 9(3): 1669-1677.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133