附建式变电站工频电磁环境及屏蔽措施研究

Study on the Power Frequency Electromagnetic Environment of Accessory Substation and the Relevant Shielding Measures

摘要: 作为一种全新形式的附建式变电站，对工频电磁环境提出严苛的要求。本文以新型附建式变电站为研究对象，确定变压器及裸露母排为主要电磁骚扰源，采用Ansoft Maxwell软件对附建式变电站的工频电磁场空间分布和距离衰减特性进行了仿真分析。为进一步削弱电磁场强度，在变电站墙体内设置屏蔽体，对比研究了具有不同结构、不同电气特性的屏蔽材料对工频电场和磁场的屏蔽效果，提出了附建式变电站工频电磁屏蔽设计的指导意见。

Abstract: As a novel type of substation, the accessory substation puts forward strict requirements to the power frequency electromagnetic environment. In this paper, the novel accessory substation was taken as the research project. Transformer and bare busbar were confirmed as main electromag-netic disturbance sources. Simulation by using of Ansoft/Maxwell was developed to describe the spatial distribution of the power frequency electromagnetic field and its property that the filed intensity delays with the increase of the distance. In order to further weaken the electromagnetic field, some shield materials were set inside the wall of substation. The shielding effectiveness of the different structures and different electrical characteristics of shield materials were compared and analyzed. Eventually the guidances for the design of power frequency electriomagnetic shielding of accessory substation were proposed.