220kV茅口变电站整体改造方案研究

发布时间：2018-06-24 18:53

本文选题：变电站 + 整体改造　；参考：《南京理工大学》2014年硕士论文

【摘要】：220kV变电站作为城市电网的主力电源点,供电可靠性要求高,而变电站中的设备运行可靠性,直接影响电网的供电可靠性。220kV茅口变作为连云港北部城区的主要电源点,已运行24年,设备、土建等方面都存在问题,供电能力也无法满足区域负荷的发展需求,需要进行整体改造。通过对改造方案的研究,能够有效解决茅口变的现状问题,提高茅口变的供电可靠性和供电能力,满足区域经济发展的需求。论文首先介绍了220kV茅口变的现状,从网架结构、一次设备、二次及远东设备、土建部分、线路部分和负荷情况进行了分析,找出存在问题,提出整体改造的需求；结合区域经济发展和电网规划情况,研究了改造后变电站的电压等级选择,采用电网发展成本最小费用法建立模型,并应用模型通过投资费用的比较选择变电站电压等级；综合土地利用和环境要求等情况研究了三种变电站整体改造方案,通过技术、经济比较推荐了最优的改造方案；在此基础上,研究提出了变电站建设的具体设计,开展了变压器、主接线、主要设备等一次方案的研究设计,并提出了主变保护、线路保护、母线保护等二次方案和远东、通信方案的设计方案。茅口变整体改造方案的研究和变电站的具体设计,解决了目前运行中可靠性不高、供电能力不足的问题,为区域负荷发展提供了可靠、充足的供电电源,满足了连云港城区经济社会发展的需求。
[Abstract]:As the main power supply point of urban power network, 220kV substation requires high reliability of power supply, and the reliability of equipment operation in substation directly affects the reliability of power supply of power grid .220 kV Maokou Substation is the main power supply point in the northern part of Lianyungang. After 24 years of operation, there are problems in equipment, civil engineering and so on, and the power supply capacity can not meet the development demand of regional load, so it is necessary to carry on the overall transformation. Through the study of the transformation scheme, the present situation of Maokou transformation can be effectively solved, the reliability and ability of power supply can be improved, and the demand of regional economic development can be met. Firstly, the paper introduces the present situation of 220 kV Maokou transformer, analyzes the network structure, primary equipment, secondary and far East equipment, civil construction part, line part and load situation, finds out the existing problems, and puts forward the requirements of the overall transformation. Combined with regional economic development and power network planning, the selection of substation voltage grade after transformation is studied. The model is established by using the method of minimum cost of power grid development, and the substation voltage grade is selected by comparing the investment cost with the model. Comprehensive land use and environmental requirements have been studied in three types of substation transformation schemes. Through technical and economic comparison, the optimal transformation scheme has been recommended. On the basis of this, the specific design of substation construction has been studied and put forward. The research and design of transformer, main connection, main equipment and other primary schemes are carried out, and the secondary schemes such as main transformer protection, line protection, bus protection, and far East and communication schemes are put forward. The research on the integral transformation scheme of Maokou transformer and the concrete design of the substation have solved the problems of low reliability and insufficient power supply capacity in operation at present, and provided a reliable and sufficient power supply for the development of regional load. To meet the needs of economic and social development in Lianyungang city.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM63

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