配网10kV氧化锌避雷器防雷及老化特性研究
发布时间：2018-08-12 11:08
【摘要】：随着我国电力行业的迅猛发展,电网系统中的主网部分对配电网馈电出线10kV的供电安全要求日益提升。然而由于10kV馈电线路覆盖面积比较大,结构多种多样,并且配网输电线路往往都是很多分支的线路,因此故障发生较多的情况给各运维单位带来非常大的压力。配网系统中比较主要的故障原因就是由避雷器引起的,所以通过对配网中避雷器故障原因进行分析,对电网的防雷及其运维有重要的意义。本文首先从氧化锌避雷器的理论出发,对氧化锌避雷器的发展及其工作原理、伏安特性、优缺点以及功能特性进行了研究,为在实际中分析、做试验以及解体避雷器有了很好的理论依据。然后对北京地区的配网防雷情况做了详细的统计分析,重点进行了北京地区配网近几年来发生的故障分析和其防雷措施进行了研究。之后对北京地区比较典型的避雷器故障事故进行分析与研究,并把避雷器进行解体。最后对氧化锌避雷器进行了参考电压、泄露电流、冲击大电流以及方波冲击电流试验,并对试验结果进行分析,可知测量的氧化锌避雷器电阻片的冲击能量耐受能力范围为50～500 J/cm3。本文通过对北京电网配网线路故障进行统计分析,结合北京电网配网系统实例对10kV氧化锌避雷器进行了多项试验研究,从而得出了一些电网配网系统的运行维护建议。
[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.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM862
本文编号：2178866
[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.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM862
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