發(fā)布時(shí)間：2018-08-12 11:08

【摘要】：隨著我國電力行業(yè)的迅猛發(fā)展,電網(wǎng)系統(tǒng)中的主網(wǎng)部分對(duì)配電網(wǎng)饋電出線10kV的供電安全要求日益提升。然而由于10kV饋電線路覆蓋面積比較大,結(jié)構(gòu)多種多樣,并且配網(wǎng)輸電線路往往都是很多分支的線路,因此故障發(fā)生較多的情況給各運(yùn)維單位帶來非常大的壓力。配網(wǎng)系統(tǒng)中比較主要的故障原因就是由避雷器引起的,所以通過對(duì)配網(wǎng)中避雷器故障原因進(jìn)行分析,對(duì)電網(wǎng)的防雷及其運(yùn)維有重要的意義。本文首先從氧化鋅避雷器的理論出發(fā),對(duì)氧化鋅避雷器的發(fā)展及其工作原理、伏安特性、優(yōu)缺點(diǎn)以及功能特性進(jìn)行了研究,為在實(shí)際中分析、做試驗(yàn)以及解體避雷器有了很好的理論依據(jù)。然后對(duì)北京地區(qū)的配網(wǎng)防雷情況做了詳細(xì)的統(tǒng)計(jì)分析,重點(diǎn)進(jìn)行了北京地區(qū)配網(wǎng)近幾年來發(fā)生的故障分析和其防雷措施進(jìn)行了研究。之后對(duì)北京地區(qū)比較典型的避雷器故障事故進(jìn)行分析與研究,并把避雷器進(jìn)行解體。最后對(duì)氧化鋅避雷器進(jìn)行了參考電壓、泄露電流、沖擊大電流以及方波沖擊電流試驗(yàn),并對(duì)試驗(yàn)結(jié)果進(jìn)行分析,可知測(cè)量的氧化鋅避雷器電阻片的沖擊能量耐受能力范圍為50～500 J/cm3。本文通過對(duì)北京電網(wǎng)配網(wǎng)線路故障進(jìn)行統(tǒng)計(jì)分析,結(jié)合北京電網(wǎng)配網(wǎng)系統(tǒng)實(shí)例對(duì)10kV氧化鋅避雷器進(jìn)行了多項(xiàng)試驗(yàn)研究,從而得出了一些電網(wǎng)配網(wǎng)系統(tǒng)的運(yùn)行維護(hù)建議。
[Abstract]:With the rapid development of the electric power industry in China, the main network part of the power network system is increasing the security requirements of the distribution network feed line 10kV. However, due to the large coverage area of 10kV feeder lines and the variety of structures, and the distribution network transmission lines are often many branches of the line, so more failures will bring a lot of pressure to the operation and maintenance units. The main fault reason of distribution network system is caused by lightning arrester, so it is of great significance to prevent lightning and its operation by analyzing the reason of lightning arrester fault in distribution network. Based on the theory of zinc oxide arrester, the development and working principle, volt-ampere characteristics, advantages and disadvantages, and functional characteristics of zinc oxide arrester are studied in this paper. It has a good theoretical basis to do the experiment and break up the arrester. Then the lightning protection situation of distribution network in Beijing area is analyzed in detail, and the fault analysis and lightning protection measures of distribution network in Beijing area in recent years are emphatically studied. Then the typical lightning arrester fault in Beijing area is analyzed and studied, and the arrester is disintegrated. Finally, the reference voltage, leakage current, high impact current and square wave impulse current of the zinc oxide arrester are tested, and the test results are analyzed. The measured impact energy tolerance of the ZnO arrester resistor is in the range of 50 ~ 500 J / cm ~ 3. In this paper, through the statistical analysis of the fault of distribution network in Beijing power network, combined with the example of distribution network system in Beijing power grid, several experiments on 10kV zinc oxide arrester have been carried out, and some suggestions for the operation and maintenance of distribution network system of power network have been obtained.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM862

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