大连500kV架空输电线路导线研究

发布时间：2018-04-30 05:34

本文选题：输电线路 + 导线选型　；参考：《大连理工大学》2015年硕士论文

【摘要】：电力是居民生活和工业发展必不可少的能源要素,而电力的输送是电力系统的基础。架空输电线路相比较于采用地下电缆的输电方式,具有建设成本低,施工周期短以及维护方便等优势,因此是较为常用的输电方式。合理选择导线截面及其分裂形式直接关系到架空线路的工程建设费用以及建成后的技术特性和运行成本。因此架空输电线路的导线选型问题实际上是一个在满足技术特性要求下平衡初期投资和长期运行费用的技术经济综合问题。本课题从技术性和经济性两个方面对大连500kV架空输电线路的导线选型进行分析。首先参考国内外现有的设计经验,提出了9种常规导线方案和一种扩径导线方案作为备选导线方案。在技术性方面,本研究进行了无线电干扰、可听燥声、电晕损耗、电阻损耗、发热校验、最小线高、自然功率以及适应线路所经过地区气候条件和地形条件的机械特性等方面的计算。从而从技术角度对备选方案进行比较,并判断这些指标是否符合相关规定和国家标准的要求。从各项技术指标的计算结果来看,4分裂导线方案具有很大的优势,包括4×LGJ-400/35常规导线和4×LGJK-300/50扩径导线。就经济性而言,需要平衡初期投资和长期运行费用。导线截面影响线路投资和电能损耗,为了节省投资,要求导线截面小些；为了降低电能损耗,要求导线截面大些,因此需要综合分析。本课题从工程投资和年运行费用两个方面对各种导线方案进行了比较。从工程初期投资看,4×LGJK-300/50扩径导线方案最省,4×LGJ-400/35导线方案次之。从长期运行费用来看,4×LGJ-400/35和3×LGJ-500/45导线方案较优。最终通过技术和经济两方面的综合考虑,确定4×LGJ-400/35为大连500kV架空线路所选用的导线类型。
[Abstract]:Electric power is an essential energy element for the development of life and industry, and the transmission of electricity is the basis of power system. Compared with underground cable transmission lines, overhead transmission lines have the advantages of low construction cost, short construction period and convenient maintenance. The reasonable selection of traverse section and its split form is directly related to the construction cost of overhead line and the technical characteristics and operation cost after completion. Therefore, the problem of conductor selection for overhead transmission lines is in fact a technical and economic comprehensive problem that balances the initial investment and long-term operating costs under the requirements of technical characteristics. This paper analyzes the conductor selection of Dalian 500kV overhead transmission line from technical and economic aspects. Based on the existing design experience at home and abroad, nine kinds of conventional traverse schemes and one kind of expanding traverse scheme are proposed as alternative traverse schemes. In the technical aspect, the research carried out radio interference, audible sound, corona loss, resistance loss, heat check, minimum line height, The calculation of natural power and the mechanical characteristics of the climatic and topographic conditions of the area through which the line is adapted. From the technical point of view, compare the alternatives and judge whether these indicators meet the requirements of relevant regulations and national standards. From the calculation results of various technical indexes, we can see that the scheme has great advantages, including 4 脳 LGJ-400/35 conventional traverse and 4 脳 LGJK-300/50 expanding traverse. In terms of economy, we need to balance initial investment and long-term operating costs. The traverse section affects the line investment and power loss, in order to save investment, the traverse section is required to be smaller; in order to reduce the power loss, the traverse section is required to be larger, so it needs comprehensive analysis. In this paper, various traverse schemes are compared in terms of project investment and annual operating cost. In view of the initial investment of the project, the 4 脳 LGJK-300/50 traverse scheme is the most economical and the second is the 4 脳 LGJ-400/35 traverse scheme. The 4 脳 LGJ-400/35 and 3 脳 LGJ-500/45 traverse schemes are better in terms of long term operating cost. Finally, through the comprehensive consideration of technology and economy, it is determined that 4 脳 LGJ-400/35 is the type of conductor selected for Dalian 500kV overhead line.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM75

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