山西焦煤集团矿区电网防雷技术研究
发布时间：2018-08-02 16:40
【摘要】：煤矿的矿区电网是煤矿开采作业的动力来源,随着矿区煤炭的产量和规模不断扩大,矿区电网的安全和可靠显得尤为重要。近几年来,雷害事故增多给山西焦煤集团在安全和经济上带来的威胁逐步凸显,引起了企业的重视。为保证煤矿井下的安全作业,企业以提高矿区电网持续、稳定的供电能力为中心,开展矿区电网相关的防雷工作。本论文以山西焦煤集团矿区电网为实例,对煤矿企业的关键处(变电站、风机房和瓦斯抽放站)进行相应的防雷问题研究。本文以焦煤集团汾西矿区柳西110kV变电站两台主变被损坏的事故为切入点,通过现场实地调研了解了矿区电网所使用的防雷措施、矿区整体的雷害特征和相关事故情况。同时,根据现场发现的问题进行了变电站现场试验,得到了矿区变电站的数据指标。并通过从现场获取的线路绝缘子进行了高压实验室试验分析,获取了现场线路耐雷水平和绝缘子电气特性等数据。通过这些可靠数据对矿区电网的防雷问题进行理论分析,找出其存在的问题的根源所在,如：绝缘水平不匹配、设备使用和安装上的问题和雷电冲击局部电压过高等。根据焦煤矿区电网防雷问题分别针对矿区变电站、矿区线路、风机房直配线路和瓦斯抽放站提出了各自相对应的防雷改造措施。主要有：线路设置进行段保护、变电站进行冲击优化接地改造、瓦抽站的新型防雷改造和风机房直配线路精细化防雷保护等。本文提出的针对矿区电网的改造措施在焦煤集团汾西矿区进行了相应的改造应用,经过一年时间的实践运行证明各项改造均达到了预期的设定的目标,防雷改造效果良好,矿区没有出现设备遭受雷击损坏的事故。
[Abstract]:The power grid of coal mining area is the power source of coal mining. With the continuous expansion of coal production and scale, the safety and reliability of mining power grid is particularly important. In recent years, the increasing number of lightning accidents to Shanxi Coking Coal Group in the security and economic threats gradually highlighted, attracted the attention of enterprises. In order to ensure the safe operation of underground coal mine, the enterprises focus on improving the continuous and stable power supply ability of the mining power network, and carry out the lightning protection work related to the mining power grid. Taking Shanxi Coking Coal Group Power Grid as an example, this paper studies the key points (substation, fan house and gas drainage station) of coal mine enterprises. Based on the damage accident of two main transformers in Liuxi 110kV Substation of Fenxi Mining area of Coking Coal Group, the lightning protection measures used in mining power network, the lightning damage characteristics and related accidents in the whole mining area are investigated in this paper. At the same time, the field test of substation is carried out according to the problems found in the field, and the data index of substation in mining area is obtained. Through the high voltage laboratory test and analysis of the line insulators obtained from the field, the lightning resistance level and the electrical characteristics of the insulators are obtained. Based on these reliable data, the lightning protection problem of mining power network is theoretically analyzed, and the root causes of the problems are found out, such as the mismatch of insulation level, the problems in the use and installation of equipment and the over-high local voltage of lightning impulse, etc. According to the lightning protection problem of power network in coal mining area, the corresponding lightning protection measures are put forward for substation, mine line, direct distribution line of fan house and gas drainage station respectively. The main measures are as follows: line installation for segment protection, substation for impact optimization and grounding transformation, new type of lightning protection for the tile pumping station and fine lightning protection for the direct distribution line in the wind turbine room, and so on. The transformation measures proposed in this paper have been applied in Fenxi Coal Mining area of Coking Coal Group. After one year's practice, it has been proved that all the revamping has reached the expected target, and the lightning protection retrofit effect is good. There was no accident of lightning damage to equipment in the mine.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM863
本文编号：2160042
[Abstract]:The power grid of coal mining area is the power source of coal mining. With the continuous expansion of coal production and scale, the safety and reliability of mining power grid is particularly important. In recent years, the increasing number of lightning accidents to Shanxi Coking Coal Group in the security and economic threats gradually highlighted, attracted the attention of enterprises. In order to ensure the safe operation of underground coal mine, the enterprises focus on improving the continuous and stable power supply ability of the mining power network, and carry out the lightning protection work related to the mining power grid. Taking Shanxi Coking Coal Group Power Grid as an example, this paper studies the key points (substation, fan house and gas drainage station) of coal mine enterprises. Based on the damage accident of two main transformers in Liuxi 110kV Substation of Fenxi Mining area of Coking Coal Group, the lightning protection measures used in mining power network, the lightning damage characteristics and related accidents in the whole mining area are investigated in this paper. At the same time, the field test of substation is carried out according to the problems found in the field, and the data index of substation in mining area is obtained. Through the high voltage laboratory test and analysis of the line insulators obtained from the field, the lightning resistance level and the electrical characteristics of the insulators are obtained. Based on these reliable data, the lightning protection problem of mining power network is theoretically analyzed, and the root causes of the problems are found out, such as the mismatch of insulation level, the problems in the use and installation of equipment and the over-high local voltage of lightning impulse, etc. According to the lightning protection problem of power network in coal mining area, the corresponding lightning protection measures are put forward for substation, mine line, direct distribution line of fan house and gas drainage station respectively. The main measures are as follows: line installation for segment protection, substation for impact optimization and grounding transformation, new type of lightning protection for the tile pumping station and fine lightning protection for the direct distribution line in the wind turbine room, and so on. The transformation measures proposed in this paper have been applied in Fenxi Coal Mining area of Coking Coal Group. After one year's practice, it has been proved that all the revamping has reached the expected target, and the lightning protection retrofit effect is good. There was no accident of lightning damage to equipment in the mine.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM863
【参考文献】
相关期刊论文 前1条
1 李景禄;中小型水力发电厂直配线路防雷保护研究[J];电瓷避雷器;2004年01期
，本文编号：2160042
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