摘要
杆塔接地装置对输电线路的的安全稳定运行起着至关重要的作用,其冲击特性是考量杆塔防雷效果的重要参数。笔者基于矩量法和电路理论,以接地体的漏电流为未知量,建立接地网数值计算模型对杆塔接地装置的冲击特性进行频域分析。通过CDEGS软件计算结果进行对比,验证算法的有效性;着重计算杆塔垂直接地装置的冲击阻抗,分析垂直接地极长度对接地装置冲击特性的影响。
The grounding device of tower plays a vital role in safe and stable operation of transmission lines; its impulse characteristic is an important parameter for consideration of lightning protection. Based on moment method and circuit theory, and taking leakage current of grounding device as unknown variables, grounding - grid numerical calculation model is established to make frequency domain analysis of impact characteristics of tower grounding device, and the calculation results are compared by CDEGS software to demonstrate the algorithm efficiency. Particularly, the impact resistance of tower vertical -grounding device is calculated, and impulse characteristic affected by length of vertical - grounding electrodes is also analyzed in this paper.
出处
《红水河》
2017年第1期74-78,共5页
Hongshui River
关键词
接地装置
垂直接地
冲击阻抗
场路结合法
grounding device
vertical grounding
impact resistance
field-circuit algorithm
