CAJ | 학술논문

城市地下电缆线路对环境及民众的电磁影响在近年引起广泛关注。利用二维有限元磁场分析方法，对典型电缆隧道建模，计算隧道内、外部环境中的工频磁场，研究其空间分布规律，并讨论相关因素的影响。研究发现，随着电缆回路数的增加、敷设密集程度加剧、负载电流增大，隧道内外部的工频磁场增加；与电缆线路之间的距离是决定工频磁场大小的关键要素；磁性支架中容易积聚较大的磁场，降低电缆的经济性及安全性。对几个实际电缆隧道中的工频磁场进行了现场测量，所得数据与仿真计算值吻合较好。计算和测量所涉及的电缆隧道在人行步道及地表所产生的工频磁场强度水平均在标准规定的曝露安全限值以内。
성시지하전람선로대배경급민음적전자영향재근년인기엄범관주。이용이유유한원자장분석방법，대전형전람수도건모，계산수도내、외부배경중적공빈자장，연구기공간분포규률，병토론상관인소적영향。연구발현，수착전람회로수적증가、부설밀집정도가극、부재전류증대，수도내외부적공빈자장증가；여전람선로지간적거리시결정공빈자장대소적관건요소；자성지가중용역적취교대적자장，강저전람적경제성급안전성。대궤개실제전람수도중적공빈자장진행료현장측량，소득수거여방진계산치문합교호。계산화측량소섭급적전람수도재인행보도급지표소산생적공빈자장강도수평균재표준규정적폭로안전한치이내。
In recent years,the electro-magnetic effect of underground power cables in cities on the environment and the public has caused widespread concern.The 2-D finite element analysis on magnetic field was used to set up simulation models for typical cable tunnels and to calculate the power frequency magnetic field inside and outside the tunnel,and the space distribution law and influence factors were discussed.It is found that the more the circuit number is,the denser cables are laid,or the higher the current is transmitted,the stronger the power frequency magnetic field inside and outside the tunnel will be.The distance from the cables is the key factor to determine the magnitude of the power frequency magnetic field.Magnetic cable brackets will cause the accumulation of magnetic field,so as to reduce the economy and safety of cable lines.In-site measurements of power frequency magnetic field were carried out in several cable tunnels,and the test data were in good agreement with the calculated values.The magnetic field strength levels at the pavement and ground surface of the cable tunnels discussed are lower than the exposure limits recommended by current standards.