江西莲花—湘东220kV线路导线选型分析

发布时间：2018-10-14 21:11

【摘要】：导线选型是输电线路设计的重要课题。多年以来国内各电压等级输电线路导线普遍采用钢芯铝绞线,该导线兼具安全性与经济性,综合效益优良。近年来为积极响应国家“节能减排”的要求,节能导线的研究与应用逐步被提上日程,国内相关厂家正逐步引进节能导线的技术和生产工艺。但节能导线方案多种多样,节能效益不一而足,对于节能导线方案的选用及其技术经济效益的评估,尚未形成有效统一、普遍适用的选型方法。本文以江西莲花-湘东220kV线路为取样,贯彻全寿命周期管理理念和分析方法,开展差异化导线选型设计。从导线的材质与结构入手,选取多种具备节能潜质的导线方案参与比选；通过载流量、电气特性、机械特性的计算和比较,筛选出满足工程需求的导线方案；通过计算各种导线方案的本期静态投资差额和远期电能损耗差额,应用年费用最小法,同时考虑资金的时间价值,详细分析比较各种导线方案的全寿命周期经济效益；经综合评估得出推荐方案,轻、中冰区导线采用节能特性显著,机械特性良好的2×JLHA3-340中强度铝合金绞线；重冰区常规段导线采用节能与机械平衡的2×JLHA2-350高强度铝合金绞线,重冰区大高差、大档距段导线推荐采用机械特性优良、兼顾节能性能的2×JLHA1/G1A-300/50钢芯铝合金绞线。通过对上述选型过程的归纳整理,形成一整套关注全寿命周期节能效益的导线选型方法,为节能导线方案的选用和技术经济效益评估提供了有效参考,对于提高输电线路全寿命周期经济效益具有积极意义。
[Abstract]:Conductor selection is an important subject in transmission line design. For many years, steel core aluminum strands have been widely used for various voltage grade transmission line conductors in China. The wire is both safe and economical, and the comprehensive benefit is excellent. In recent years, in order to respond positively to the request of national energy saving and emission reduction, the research and application of energy saving conductors have been put on the agenda step by step, and domestic related manufacturers are gradually introducing the technology and production technology of energy saving conductors. However, there are a variety of energy-saving traverse schemes and various energy-saving benefits. The selection of energy-saving traverse schemes and the evaluation of their technical and economic benefits have not yet formed an effective unified and universally applicable selection method. This paper takes the Lianhua-Xiangdong 220kV line in Jiangxi Province as sampling, carries out the concept of life-cycle management and analysis method, and develops the design of differentiated conductor type selection. Starting with the material and structure of the conductors, various traverse schemes with energy-saving potential are selected to participate in the comparison and selection, and through the calculation and comparison of the load current, electrical characteristics and mechanical characteristics, the traverse schemes that meet the engineering requirements are selected. By calculating the current static investment difference and the forward power loss difference of various traverse schemes, applying the method of minimum annual cost and considering the time value of the funds, the economic benefits of the whole life cycle of various traverse schemes are analyzed and compared in detail. According to the comprehensive evaluation, the recommended scheme is that 2 脳 JLHA3-340 medium strength aluminum alloy strands with remarkable energy saving characteristics and good mechanical properties are used for light and medium ice zone conductors, and 2 脳 JLHA2-350 high strength aluminum alloy strands with energy saving and mechanical balance are used for conventional section conductors in heavy ice regions. A 2 脳 JLHA1/G1A-300/50 steel core aluminum alloy strand with excellent mechanical properties and energy saving performance is recommended for heavy ice regions with large height difference and large spacing. Through the induction and arrangement of the above selection process, a whole set of traverse selection methods focusing on the energy saving benefit of the whole life cycle is formed, which provides an effective reference for the selection of the energy-saving traverse scheme and the evaluation of the technical and economic benefits. It is of great significance to improve the economic benefit of transmission line in the whole life cycle.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TM75

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