变电站大型电力设备工频磁场计算及分析  

Calculation and Analysis of Power Frequency Magnetic Field of Large Power Equipment in Substation

作　　者：李永明[1] 何胜鱼 王旭旭 邹岸新 徐禄文 LI Yongming;HE Shengyu;WANG Xuxu;ZOU Anxin;XU Luwen(State Key Laboratory of Power Transmission Equipment&System Security and New Technology,Chongqing University,Chongqing 400030,China;Chongqing Electric Power Test&Research Institute,Chongqing 401123,China)

机构地区：[1]输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆400030 [2]重庆电力科学试验研究院,重庆401123

出　　处：《南方电网技术》2019年第11期83-88,共6页Southern Power System Technology

摘　　要：变电站内电力设备分布集中、形状复杂,导致对变电站内工频磁场的计算研究变得复杂、不宜计算。变电站中500 kV开关场、变压器以及电抗器对变电站中工频电场整体分布影响较大。首先为简化计算,对这些大型电力设备进行三维建模,再将毕奥萨伐尔定律应用在工频磁场的计算中,然后对大型电力设备周围的工频磁场分布进行了计算分析。计算结果表明,500 kV开关场区域离地面高1.5 m平面上工频磁场分布在0.1~1.6μT之间,变压器区域工频磁场分布在1~6μT之间,电抗器组区域工频磁场分布在0.1~4.5 mT之间,数值较大。计算结果可为在设计阶段优化变电站工频磁场分布提供参考。The distribution of power equipment in substation is concentrated and their shapes are complex.The whole distribution of power frequency electric field in substation is influenced by 500 kV switching field,transformers and reactors.Firstly,in order to simplify the calculation,3D modeling of these large power equipment is carried out.Then Biosaval s Law is applied to the calculation of power-frequency magnetic field,and then the distribution of power-frequency magnetic field around the large power equipment is calculated and analyzed.The results show that the power frequency magnetic fields in the 500 kV switching field area varies between 0.1 and 1.6μT,the power frequency magnetic fields in the transformer area varies between 1 and 6μT,and the power frequency magnetic fields in the reactor group varies between 0.1 and 4.5 mT,which is relatively large.The results can provide reference for optimizing the distribution of power frequency magnetic field in the design stage.

关 键 词：变电站 工频磁场 开关场 变压器 电抗器 数值计算 

分 类 号：TM721[电气工程—电力系统及自动化]