输电线路地磁感应电流常用算法分析与研究  

Analysis and Study of Common Algorithms for Geomagnetic Inductive Current in Grid

作　　者：李功新[1] 王倩[2] 刘连光[2] 

机构地区：[1]福建省电力有限公司生产部,福建福州350003 [2]华北电力大学,北京102206

出　　处：《现代电力》2005年第5期42-46,共5页Modern Electric Power

基　　金：国家自然科学基金资助项目(50477039)

摘　　要：针对江苏阳-淮输电系统、黑龙江等电网发现的多起磁暴对电气设备的影响事件,结合我国特高压、长距离输电工程建设,提出了研究磁暴在输电线路产生地磁感应电流(GIC)的分析算法。文中在研究我国电网GIC意义和电网GIC产生机理、特征基础上,对基于平面波、复镜像法等理论的4种输电线地面电势(ESP)常用算法进行了分析、比较,指出经改进、完善平面波理论能满足中低纬度地区GIC计算的需要,同时提出了MT法地质结构建模和各种影响因素处理方法及思路。针对阳-淮系统的初步计算表明,提出的算法是有效、可行的。Based on several accidents, in which geomagnetic storm influence the electrical equipments, occurred in Jiangsu Yang-Huai power grid, Heilongjiang power network, etc, this paper proposes an algorithm of analyzing the geomagnetic inductive current（GIC）in the electric power transmission lines due to the geomagnetic storms based on the construction of a national ultra - high voltage and long - distance electrical power transmission system. This article expatiates the significance of studying GIC in the national electric power transmission system and the GIC creation mechanism and the GIC characteristics. This paper also analyzes and compares the four most frequently used ESP algorithms based on the theory of plane wave and complex reflection, etc.. It points out that the algorithm based on the plane wave theory would be suitable for reckoning the GIC in the low latitude areas. Furthermore, this paper proposes a MT geological structure model and presents various methods and ideas to deal with the influencing factors. The preliminarycalculation for the Yang-Huai system indicates that the proposed algorithm is valid and feasible.

关 键 词：输电线路 地磁暴 地磁感应电流 直流偏磁 模拟计算 

分 类 号：TM726[电气工程—电力系统及自动化] TM152