百色市中波台对塔吊感应高压电的影响及防护研究
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摘要
电磁辐射主要通过感应耦合或电磁耦合使主要由金属部件组成的塔吊感应高压电,而塔吊的结构及架设常使其更容易遭受电磁辐射的影响,特别是有中波发射塔存在的区域电磁辐射水平较高,对塔吊的影响较为明显,从而危及施工人员和财产安全。针对百色市二四二中波发射台的电磁辐射状况,通过对电磁射源及电磁环境特点等方面进行分析与计算,利用等效电路模型探讨电磁辐射对附近施工建筑塔吊感应高压电的影响,得出塔吊的谐振点、中波发射台在塔吊处的电场强度及感应电压。采取绝缘、重复接地和避开谐振点方法解决长期以来建筑塔吊临近通讯发射源感应高压电而难于防护的突出问题,从而提高塔吊在电磁辐射环境中工作的安全性,并对此类领域的研究或对类似感应电的防护提供科学借鉴。
The tower cane,which is mainly made of metal,would be induced high-voltage surge by electromagnetic radiation through induction coupling or electromagnetic coupling.The structure and erection of tower crane will often make it easier to be influenced by electromagnetic radiation,especially in the area which exists MW broadcasting towers and has higher level of electromagnetic radiation,and it will endanger the safety of construction personnel and property.Aiming at the electromagnetic radiation condition of Baise 242 MW broadcasting station,by the analysis and calculation of electromagnetic radiation source and electromagnetic environment characteristics,the influence of electromagnetic radiation on the induced high-voltage surge of tower crane nearby was discussed by Equivalent Circuit Model.The resonance point,electric field intensity and induction voltage of tower crane were obtained.The methods of using insulation,iterative earthing and avoiding resonance point were presented to solve the problem that the induced high-voltage surge of construction tower crane close to communication emission source is hard to be protected,so as to improve the safety level of tower crane working in the electromagnetic environment,and it provides scientific reference to the similar research and protection.
The tower cane,which is mainly made of metal,would be induced high-voltage surge by electromagnetic radiation through induction coupling or electromagnetic coupling.The structure and erection of tower crane will often make it easier to be influenced by electromagnetic radiation,especially in the area which exists MW broadcasting towers and has higher level of electromagnetic radiation,and it will endanger the safety of construction personnel and property.Aiming at the electromagnetic radiation condition of Baise 242 MW broadcasting station,by the analysis and calculation of electromagnetic radiation source and electromagnetic environment characteristics,the influence of electromagnetic radiation on the induced high-voltage surge of tower crane nearby was discussed by Equivalent Circuit Model.The resonance point,electric field intensity and induction voltage of tower crane were obtained.The methods of using insulation,iterative earthing and avoiding resonance point were presented to solve the problem that the induced high-voltage surge of construction tower crane close to communication emission source is hard to be protected,so as to improve the safety level of tower crane working in the electromagnetic environment,and it provides scientific reference to the similar research and protection.
引文
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[2]Notaros B M,Djordjevic M,Ilic M M.Higher order electromag-netic modeling for wireless technology applications.Wireless Com-munication Technology,2003IEEE Topical Conference on1517Oct,2003:229～232
[3]S.J.Radzevicius.Near-field dipole radiation dynamics through FDTD modeling.Journal of Applied Geophysics,2003,(52):75～91
[4]徐汉涛,丁华建.塔式起重机应变测试中的误差分析及修正方法[J].南通大学学报(自然科学版),2005,(4):31～33XU Han-tao,DING Hua-jian.Analysis and Amending Method of the Errors in Stress Test of a Tower Crane,2005,(4):31～33
[5]刘红梅,金江,王海霞.塔式结构地震响应仿真分析[J].南通大学学报(自然科学版),2006,(4):25～28LIUHong-mei,JINJiang,WANG Hai-xia.Simulation Analysis of Responses to the High-rise Tower Structure under Earthquake Wave,2006,(4):25～28
[6]闻映红.天线与电波传播理论[M].北京:清华大学出版社,2007WEN Ying-hong.Theory of Antenna And Radio Waves Propaga-tion[M].Qinghua university press,2007
[7]孙庆云.防止起重机碰撞带电导线静电感应安全模型的研究[J].中国安全生产科学技术,2006,2(3):14～18SUN Qing-Yun.Prevent electrostatic induction electric wires colli-sion of crane safety model research[J].Journal of Safety Science and Technology,2006,2(3):14～18
[8]郭运海.无线电辐射对环境的影响和辐射强度的计算[J].中国无线电管理,1996,(6):16～19GUO Yun-hai.Radio Radiation Effect On The Environment And Radiation Intensity Calculation[J].China Radio Managent,1996,(6):16～19
[9]郝秀玲,杨君.配电系统铁磁谐振过电压的分析和措施探讨[J].中国安全生产科学技术,2008,4(4):180～182HAO Xiu-Ling,YANG Jun.Distribution system analysis of ferro-resonance over-voltage and measures are discussed[J].Journal of Safety Science and Technology,2008,4(4):180～182
[10]钟松峰,朱泽健,李均美.电磁辐射场强估算与深圳中波电台实例分析[J].电子质量,2006,(2):16～19ZHONG Song-feng,ZHU ze-feng,LI Jun-mei.Electromagnetic Radiation Field Intensity Evaluation and Shenzhen Medium Wave Radio Station Case Analysis[J].Electronics Quality,2006,(2):16～19
[11]侯牧武,曾嵘,何金良.感应过电压对输电线路耐雷水平的影响[J].电网技术,2004,28(12):46～49HOUMu-wu,ZENG Rong,HE Jin-liang.Influence Of Lightning Induced Voltage On Lightning Withstand Level Of Tansmssion Lines[J].Power System Technology,2004,28(12):46～49
[12]刘亚斌.应用感应式电子巡检系统,提高海外项目生产安全性[J].中国安全生产科学技术,2009(增刊):109～110LIU Ya-bin.Application of inductive electron circuit system,im-prove the production safety of overseas projects[J].Journal of Safety Science and Technology,2009(supl.):109～110
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