750kV单回并行输电线路电磁辐射环境研究  

Electromagnetic Radiation Environment of 750 kV Single Cycle Parallel Transmission Line

作　　者：任定高[1] REN Dinggao(Beijing Research Institute of Chemical Engineering and Metallurgy,CNNC,Beijing 101149,China)

机构地区：[1]核工业北京化工冶金研究院,北京101149

出　　处：《铀矿冶》2024年第1期93-98,共6页Uranium Mining and Metallurgy

摘　　要：采用《环境影响评价技术导则输变电》(HJ 24—2020)附录C、D推荐的计算模式对750 kV单回并行输电线路电磁辐射环境进行计算与预测。结果表明,经过耕地、园地、牧草地、畜禽饲养地、道路等场所,当导线对地最小高度为15.5 m时,单回并行线路下的工频电场强度最大值超过10 kV/m;需将导线对地最小高度提至16.5 m,才能满足4 kV/m控制限值要求。750 kV单回并行输电线路产生的工频磁场强度小于公众曝露控制限值(100μT),一般情况下不会成为线路建设的环境制约因素;但其产生的工频电场是电磁环境影响的主要因素,电场强度控制限值(4 kV/m)是线路建设的环境制约因素,同时也是输变电电磁环境重点控制因素。现场实测结果与理论预测结果符合性较好,表明采用的预测模式具有较好的应用性,研究结果可为750 kV单回并行输电线路的建设和环境监管提供支持。The electromagnetic radiation environment of 750 kV single cycle parallel transmission line was calculated and predicted by adopting the calculation model recommended by Appendix C and D of Technical Guidelines for Environmental Impact Assessment of Electric power Transmission and Distribution(HJ 24—2020).The results show that when the minimum height to ground of the conductor passing through farmland,garden land,pasture land,livestock and poultry breeding land,roads and other places is 15.5 m,the maximum value of the power frequency electric field intensity under the single cycle parallel line is more than 10 kV/m,the minimum height to ground of the conductor needs to be elevated to 16.5 m to satisfy the limit requirement of 4 kV/m.The power frequency magnetic field generated by the 750 kV single cycle parallel transmission line is less than the public exposure control limit(100μT),which generally will not be an environmental constraint for the construction of the line,however,the power frequency electric field generated by the line is the main factor of the electromagnetic environmental impact,and the control limit of the power frequency electric field strength(4 kV/m)is an environmental constraint for the construction of the line,and it is also a key control factor for the electromagnetic environment of the transmission and transformation power.The field measurement results and the theoretical prediction results are in good conformity,indicating that the prediction model used has good applicability,and the results of the study can provide technical support for the construction and environmental supervision of 750 kV single cycle parallel transmission lines.

关 键 词：工频电场 工频磁场 电磁辐射环境 单回并行线路 输电线路 

分 类 号：X123[环境科学与工程—环境科学]