超高压输电线路铁塔附近三维电场的数值计算  

A NUMERICAL METHOD TO CALCULATE THREE DIMENSIONAL ELECTRIC FIELD OF EHV TRANSMISSION LINE NEAR TOWERS

作　　者：张波[1] 崔翔[1] 卢铁兵[1] 李琳[1] 赵志斌[1] 

机构地区：[1]华北电力大学电力系,河北省保定市071003

出　　处：《电网技术》2003年第7期5-8,共4页Power System Technology

基　　金：国家自然科学基金资助项目(50077006)。

摘　　要：提出了一种基于矩量法的在频域下计算超高压输电铁塔附近三维电场分布的数值方法。该方法在频域下使用复电阻率的概念,将空气和土壤联合起来视为多层介质,待求变量为各段导体的漏电流,激励源既可以为电压源又可以为电流源。该方法可以分析频域下由输电线路、铁塔以及铁塔接地部分产生的三维电场分布。对同一例题下的由该方法和电力系统电磁分析软件包CDEGS计算的结果进行了比较,两者结果是吻合的。在500 kV输电线路的实测结果也验证了该方法的有效性。On the basis of the method of moment, a numerical method to calculate the three dimensional electric field of EHV transmission line near tower in frequency domain is presented. Using the concept of complex resistivity in frequency domain, in this method the air and soil are regarded as the multi-layer dielectrics, the leakage currents of each part of conductors are the variables to be solved. The exciting source can be both voltage source or current source. With the presented method the distribution of the three dimension electric field in frequency domain which consists of the transmission line, tower and grounding part of the tower can be analyzed. The comparison of the calculation results from the same example calculated by the presented method and the famous software CDEGS shows that the two results are coincided. The effectiveness of the persented method is verified by measured results from 500kV transmission line.

关 键 词：超高压输电线路 铁塔 三维电场 数值计算 矩量法 

分 类 号：TM726.1[电气工程—电力系统及自动化] TM753