ZnO避雷器在架空输电线路防雷保护中的应用

重点分析了线路在遭受雷电时,ZnO避雷器与绝缘子串之间的相互配合使用.同时分析了避雷器的基本参数并提出有关建议,从而得出应用ZnO避雷器在防雷保护中有显著效果,为设备提供最佳保护,提高了保护可靠性,为可靠性供电提供了保障.     

10kV架空绝缘线路防雷探讨——带环形电极外串间隙金属氧化物避雷器的应用

介绍了一种新型防雷保护装置——带环形电极外串间隙金属氧化物避雷器;给出了其在10kV架空绝缘线路上的安装方法,对比了安装前后线路的运行情况,并进行了技术经济分析。结果显示,在10kV架空绝缘线路上使用带环形电极外串间隙避雷器能有效减少雷害且收效显著。     

线路避雷器在高压输电线路防雷保护中的运用

本文介绍了线路避雷器的防雷原理，并对挂网运行三年的线路避雷器进行了跟踪统计分析，对线路避雷器的防雷效果作出肯定，同时阐述线路避雷器的安装位置、方式、相别对提高线路耐雷水平有很大的影响。     

架空输电线路的防雷与接地

通过对架设在双水泥杆及单水泥杆上的110kV、220kV输电线路雷电危害原因、原理进行分析,提出了雷电的防护对策。采用安装线路避雷器、降低杆塔冲击接地等方法,有效地解决了110kV、220kV输电线路的防雷与接地问题。     

线路避雷器在输电线路防雷中的应用

介绍了线路避雷器防雷的原理,并对挂网运行两年的避雷器进行了跟踪统计,对线路避雷器的防雷效果进行了评估。     

线路避雷器在输电线路防雷中的应用

介绍了线路避雷器防雷的原理,并对挂网运行２ａ以后的避雷器进行了跟踪统计,对线路避雷器的防雷效果进行了评估。     

110 kV输电线路的线路避雷器防雷问题分析

对线路避雷器与杆塔绝缘子串的并联安装形式进行了分析,指出,在杆塔绝缘子串、线路避雷器先后承受雷电过电压的情况下,线路避雷器将有可能失去保护作用。文中还提出了改进意见,建议应从设计及运行上改进线路避雷器的安装,使雷击杆塔顶部时所产生的雷电过电压先作用于线路避雷器,后作用于杆塔绝缘子串,或至少同时作用于两者,以有效发挥线路避雷器的防雷保护作用。     

线路避雷器在输电线路防雷中的应用及建议

分析线路避雷器在天生桥地区220 kV及以上交流线路防雷工作中的应用情况。通过查询雷电定位系统,统计天生桥地区雷电参数,总结、分析2001年以来该地区输电线路雷击跳闸情况,结果表明安装线路避雷器能有效降低线路雷击跳闸率,具有较好的防雷效果。根据运行经验及线路避雷器只对安装塔安装相有保护作用的特点,提出了线路避雷器安装选点和运行维护方面的建议。     

线路避雷器在输电路防雷中的应用

介绍了线路避雷器防雷的原理,并对挂网运行两年的避雷器进行了跟踪统计,对线路避雷的防雷效果进行了评估。     

高压架空输电线路防雷措施与应用

为了促进深圳供电局所属高压输电线路的防雷保护工作,结合目前国内外高压输线路防雷保护措施的应用情况,分析了架设避雷线和耦合地线、降低杆塔接地电阻、安装线路避雷器等常用措施的防雷效果与特性,介绍了国外采用的新型防雷技术措施,总结了深圳供电局在防雷措施应用方面的实践经验,指出今后开展防雷工作的主要方向。     

增城110 kV线路避雷器运行效果分析

分析了线路避雷器的防雷原理．根据易遭受雷击的110kV线路采用复合绝缘外套金属氧化物避雷器后的实际运行情况,对避雷器投运前后线路跳闸数据进行分析对比。从而说明了线路避雷器确实具有一定的防雷效果。最后对线路避雷器的一些使用问题提出了建议。     

Investigation of effect of transmission line arresters verified by lightning surges at substations

In recent years, transmission line arresters have been installed to protect overhead power transmission lines from backflashovers caused by lightning. In addition, it has been expected that substation lightning surges incoming via transmission lines can be suppressed by them. However, the suppression effect by those with series gaps has not been investigated sufficiently. The author has measured lightning surges at two 77‐kV substations from 1990 to 1993. As the transmission line arresters have been mounted on the towers since 1992, the lightning surges due to the sparkover of the series gap of the transmission line arresters can be observed at the substations. In this paper, the lightning surge waveforms due to such sparkover have been analyzed in detail. Next, an accurate EMTP simulation method considering the induced lightning surge voltages has been proposed. Finally, their suppression effect has been investigated by simulation corresponding to each mounting method. © 1999 Scripta Technica, Electr Eng Jpn, 126(4): 30–39, 1999     

输电线路综合防雷技术探讨

结合实际运行经验,对输电线路雷击故障进行统计,分析引起线路雷击跳闸的主要原因,综合评估输电线路各项防雷措施.结合现场微地形、微气候条件,在满足经济性和技术性的前提下,针对一般架空输电线路给出综合防雷治理方案.     

线路避雷器在线路防雷上的应用效果

为了减少雷击对输电线路的伤害，将线路避雷器安装在输电线路的易击段，可以提高线路的耐雷水平。鉴此，介绍了线路避雷器防雷的基本原理和安装前的准备工作。并对近年来肇庆四会供电分公司部分已挂网运行的避雷器进行了跟踪分析，原多雷击杆塔自从加装了线路带串联间隙避雷器后，迄今杆塔未发生雷击跳闸。     

Effect of lightning overvoltages on low-voltage power distribution lines due to direct lightning hits to overhead ground wire

Overhead ground wires and surge arresters have been installed to protect high-voltage power distribution lines and apparatus from overvoltages induced by nearby lightning strokes. The effects of surge arresters for protection of high-voltage distribution lines against direct lightning strokes have already been investigated using the digital simulation program EMTP (Electromagnetic Transients Program). With regard to the protection of low-voltage distribution lines from overvoltages induced by lightning strokes, experimental analyses using a scale model line have been reported. This paper reports on the comparison between the experimental analyses and EMTP simulation of power distribution lines, including low-voltage lines, and the validity of EMTP simulation. Furthermore, this paper analyzes the overvoltages on low-voltage power distribution lines against direct lightning strokes to overhead ground wire using the digital simulation.     

Rocket-triggered lightning experiments on zinc oxide arresters and their applications to power transmission lines

In measurements of rocket-triggered lightning current and voltage performed between 1986 and 1995 on the mountain top of Okushishiku in the Kanazawa area, the authors succeeded in artificially inducing winter lightning to arresters. Using the data obtained from those measurements, we analyzed the energy absorption characteristics of surge arresters, such as are installed on every transmission line tower for three phrases, by EMTP. The energy withstand capability of an individual arrester was verified to be approximately the same as the expected value. The analysis results for the energy share of each arrester connected in parallel showed that the usual light duty arresters installed on every tower have the possibility to be able to absorb extreme winter lightning energy even if the lightning hits the power line directly. © 1998 Scripta Technica. Electr Eng Jpn, 122(4): 25–33, 1998     

Lightning protection of overhead power distribution lines

There are two major protective methods against lightning outages on overhead distribution lines. One is by use of surge arresters and the other is by an overhead ground wire. Surge arresters have rather constant effect regardless of the type of lightning outage causes. On the other hand, the effect of an overhead ground wire is quite different against the two major causes: direct lightning hit and induced overvoltages. This paper shows how to design lightning protection for overhead power distribution lines taking these characteristics into account. Copyright © 2007 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.     

输电线路避雷器的应用及其安装方案

雷击是输电线路的主要危害。线路避雷器是降低线路雷击跳闸率的有效手段,我国已使用的线路避雷器运行情况良好。但由于线路避雷器价格昂贵,线路全线安装是不现实的,所以线路避雷器的安装地点和方式是一个比较重要的问题。本文对输电线路雷害事故及防雷措施进行了分析论述,并介绍了输电线路避雷器的发展及应用情况。最后结合我国多年的应用经验和计算分析,对于输电线路避雷器的安装方案提出了一些一般性的意见,并详细分析解释了这些意见的理由。     

高压直流典型线路雷击故障的控制保护响应研究

随着糯扎渡和溪洛渡直流工程的陆续投运,南方电网"强直弱交"的格局越来越明显,直流线路故障特别是雷击引起的故障导致的直流系统闭锁严重影响着南方电网的安全稳定运行。选取南方电网所辖直流工程2013年发生的三次典型直流线路遭受雷击故障致直流闭锁的事件,剖析了电弧未熄灭、绝缘强度未恢复、连续遭受雷击等不同情况下的直流控制保护响应,得到线路故障重启逻辑中去游离时间和故障计数模块窗口时间设置的不足。提出了线路故障情况下避免直流不必要闭锁停运的建议。