摘要
高压输变电系统产生的工频电磁环境成为当今人们关注的热点问题。本研究利用COMSOL Multiphysics(多物理场有限元仿真软件),模拟分析了3种典型220 kV GIS(气体绝缘组合电器设备)变电站进线方式在周围空间所产生的工频电场和磁场分布特征及影响规律。首先建立3种输电线路的模型;然后利用有限元法进行软件仿真,计算电磁场在离地1.5 m和15 m高度处的水平分布;最后按照国际非电离辐射防护委员会(ICNRIP)1998年发布的《限制时变电场、磁场和电场磁暴露(300 Hz以下)导则》对结果进行评估。计算结果表明,220 kV电压等级的3种进线方式产生的工频电磁场均低于ICNRIP规定的公众暴露限制。
The electromagnetic environment of high -voltage transmission systems has become the focus with the increase in high voltage transmission level. The distribution features of power - frequency electric field and magnetic field of three typical incoming lines in 220 kV GIS （ gas - insulated switchgear） substation are investigated and analyzed. Firstly, the models of three typical incoming lines are established. Then the horizontal distribution of power - frequency electric field and magnetic field at the height of 1.5 meters and 15 meters above the ground is simulated and calculated using finite element method （FEM） with the software of COMSOL Multiphysics. Finally, according to ＂Guidelines for Limiting Exposure To Time - varying Electric, Magnetic, and Electromagnetic Fields （ up to 300 Hz）＂ （ ICNRIP, 1998）, the data of simulation calculation is analyzed and evaluated. The result indicates that the power - frequency electromagnetic fields generated by three kinds of incoming lines in 220 kV GIS substation are lower than the public exposure limits prescribed in ICNRIP.
出处
《四川电力技术》
2011年第5期30-33,共4页
Sichuan Electric Power Technology
关键词
输电线路
GIS变电站
电磁环境
有限元法
仿真
transmission line
GIS substation
electromagnetic environment
finite element method
simulation
