特高压干式平波电抗器直流磁场测量与分析  

Measurement and Analysis of Direct Current Magnetic Field for Ultra-high Voltage Dry-type Smoothing Reactor

作　　者：陈图腾[1] 曹继丰[1] 姜志鹏[2] 文习山[2] 王羽[2] 陈瑞珍[2] 伍仕红 

机构地区：[1]中国南方电网超高压输电公司昆明局,云南昆明650217 [2]武汉大学电气工程学院,湖北武汉430072

出　　处：《陕西电力》2015年第4期11-14,共4页Shanxi Electric Power

基　　金：国家自然科学基金(51207114);中国博士后科学基金项目资助(2014M560624)

摘　　要：干式平波电抗器产生的直流强磁场是特高压换流站内的主要电磁污染源。以磁通门计为直流磁场测量仪器,对某特高压±800 kV换流站站内极Ⅱ高压端的2台干式平波电抗器周围距地面1.2 m高处40 m×14 m区域进行磁感应强度测量,测量磁感应强度最大值为157.96μT,远小于国际非离子辐射防护委员会推荐的直流磁感应强度公众限值400 mT。试验测量结果表明:特高压干式平波电抗器对地高度较高,其周围地面1.2 m高处区域磁感应强度数量级与地球磁场数量级相当,且磁感应强度随距离衰减明显;换流站磁感应强度测量符合环境保护相关标准。Magnetic field of dry smoothing reactor in direct current （DC） condition is the main pollution sources of electromagnetic inside ultra-high voltage converter station. The work takes flux-gate magnetometer as DC magnetic field instrument to measure magnetic field distribution of the area of 40 m^14 m around two dry-type smoothing reactors of extreme high voltage terminal ]I of one ultra-high voltage converter station, and the height of measurement area is 1.2 m above the ground. The maximum of magnetic flux density is 157.96 p^T, which is much smaller than the public limit of 400 mT recommended by international commission on non- ionizing radiation protection. The results of the experimental measurement shows that the height of the ultra-high voltage dry-type smoothing reactor is large above the ground, magnetic flux density order of the measurement area with 1.2 m height correspond to the one of geomagnetic field. And the magnetic flux density decay significantly with the distance, the result of this magnetic flux density measurement meets the relevant standards of environmental protection.

关 键 词：特高压 干式平波电抗器 直流 换流站 磁感应强度 限值 

分 类 号：TM753[电气工程—电力系统及自动化]