基于敏感度的架空线路工频电场及其屏蔽效能分析  

Analysis of Overhead Line Power Frequency Electric Field and Its Shielding Effectiveness Based on Sensitivity

作　　者：王礼[1] 周为[1] 肖波[1] 林荫宇[1] 熊兰[2] 宋道军[2] 

机构地区：[1]重庆市电力公司市区供电局,重庆400010 [2]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400030

出　　处：《高压电器》2012年第7期76-80,87,共6页High Voltage Apparatus

摘　　要：超、特高压输电迅速发展,并逐渐成为跨区域、跨省的骨架电网,走廊的电磁辐射问题成为关注的热点之一。针对某500 kV单回路输电线路,首先采用模拟电荷法分析走廊沿线电场强度的空间分布特性,并基于多元敏感度分析给出线路参数对走廊附近电场分布特性的影响程度。其次,针对电场强度分布不均和部分区域场强明显超标的问题,同样基于敏感度分析了接地屏蔽导线线径、架设位置对其屏蔽效能的影响,并给出了接地屏蔽线的最佳线径和架设位置。With the rapid development of UHWEHV power grid as cross-regional, inter-provincial backbone network, the electromagnetic radiation under transmission lines become one of hot issues. In this paper, the spatial distribution properties of electric field under transmission lines of a 500 kV single circuit is discussed with charge simulation method （CSM） firstly, and sensitivity analysis based on multi-element function of the transmission-line parameters on distribution characteristics of the electric field is also analyzed. Secondly, aiming to optimize the non-equilibrium distribution of electric field intensity and excessive field strength of some areas, the effect of diameter and location parameters of the ground shielding wire is analyzed using sensitivity method and the best diameter and location parameters of the ground shielding wire is also given.

关 键 词：输电线路 模拟电荷法 屏蔽 电场 安全 

分 类 号：TM726.3[电气工程—电力系统及自动化]