摘要
为准确评价传输线路上雷电波特性,正确计算和测量线路杆塔波阻抗,在查阅国内外防雷分析中杆塔模型研究现状的基础上,阐述了集中等值电感、单一波阻抗、多波阻抗等杆塔模型;简要概述了各种通过理论分析或试验得到的Jordan、Wagner、Sargent公式等波阻抗数学计算公式和各种杆塔波阻抗的试验测量方法;分析了现有各种杆塔模型的各自特点及存在的缺陷。建议今后的研究重点要放在特高压杆塔内波的传播过程上,建立合理的塔模型来计算特高压杆塔波阻抗,以利于分析杆塔波响应。
Lightning outage accident is one of the main factors that threat seriously the safe and reliable operation of power system. So it is very important to establish reasonable transmission tower model and evaluate the impulse response characteristic of lightning wave traveling on the transmission tower properly for determining reliable lightning protection performance. It is widely accepted that the tower surge impedance is one of the important parameters for predicting the lightning outage rates of transmission line. A lot of researches have been done all over the world, many researches have put forward various models of tower such as equivalent inductance, surge impendence and multistory transmission tower model and so on. This paper introduces and analyzes briefly the existing tower models and various calculating methods of surge impedance for analyzing lightning protection performance. Also, the mathematic equations obtained by principle analysis or test such as Jordan equitation, Wanger equitation and Sargent equitation and so on were given. Furthermore, the field measurement technology and methods of surge impedance of towers are described in the paper. Based on the analysis of the feature and deficiency of different methods used to analyze the impulse response characteristic of lightning wave traveling on the transmission tower, the advice for future research is presented in this paper at last. For future research, attentions should be paid to transmitting performance of lightning wave in extra-high transmission tower; the reasonable model for analyzing lightning performance and mathematic equation for calculating the surge impedance of extra-high transmission tower should be established.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2006年第7期93-97,共5页
High Voltage Engineering
关键词
电力系统
防雷保护
杆塔
波阻抗
模型
power system
lightning protection
tower
surge impedance
model
