摘要
为优化电缆敷设方式,采用加拿大SES公司开发的CDEGS接地分析软件(Current Distribution、Electromagnetic Fields、Grounding and Soil Structure Analysis)建模计算,对隧道中敷设交流电缆线路所产生的电磁场进行评估。通过对比不同布置方式下的电磁场值,给出500kV虹杨进线工程中本期及远期最优敷设方式。按最优敷设方式对电缆隧道建模,计算隧道内、外部环境中的工频电磁场,研究其空间分布规律,并讨论相关因素的影响。研究发现:电力电缆线路唯一可能存在电磁环境影响的是工频磁场的影响问题;仅有本期2回电缆时,磁场值不超过100μT,属于安全范围,但考虑远景第3回电缆时,磁场值增加约10倍,远远超出了我国环境标准规定的限值要求,应采取有效的磁场屏蔽措施;隧道内部,电磁场最大值出现在距离隧道底部0.75m高处,随后以指数式迅速衰减;电力电缆线路在地表面的电磁场可以忽略不计。
To obtain the best laying mode of AC cable lines in tunnel,the electromagnetic field was calculated and evaluated using CDEGS.Through comparing the electromagnetic field value in different arrangement modes,the best arrangement mode of current and prospect was obtained.In this best arrangement,the power electromagnetic field distributions of environment in and out of the tunnel were calculated,and the main factors were discussed.Results show that power magnetic field is the only factor that impacts of electromagnetic field.When only current double-loop cables,the magnetic field value is less than 100μT and within the scope of safety,but in considering of the third loop cables,the value will increase by ten times and exceed the value limit,the shielding measures of power magnetic field should be taken.In the tunnel,the maximum electromagnetic field value is found in the place of 0.75 meters height of the tunnel bottom,and decreases with the exponential index.Outside the tunnel,the electromagnetic field value of the ground surface can be neglected.
出处
《中国科技论文》
CAS
北大核心
2016年第11期1315-1320,共6页
China Sciencepaper
基金
上海电力设计院有限公司重大科研项目(KY15-38-SDS)
关键词
隧道
电力电缆
电磁场
CDEGS接地分析软件
tunnel
power cable
electromagnetic field
CDEGS（Current Distribution
Electromagnetic Fields
Grounding and Soil Structure Analysis）
