海淀500kV电缆工程的技术研究与应用

发布时间：2018-09-03 14:12

【摘要】：随着我国超大城市的不断扩容,输电距离和用电量在不断增长,现有的220kV城市输电网已越来越满足不了超大城市的供电要求,因此,利用有限的空间,使用大容量的500kV电力输电电缆直接进入大城市,已成为必然的发展趋势。海淀500kV电缆工程是继上海静安工程后的国内第二条、北京市第一条长距离用于城市电网的500kV电缆。同时,青岛汉缆电缆及江苏安靠附件首次应用于大截面、长距离的500kV电压等级线路,开创了国产电缆及附件的先河,对于提高国内电缆行业技术水平,逐步实现500kV电缆及附件国产化具有重大的历史意义。本文对500kV电缆现状进行了充分调研,系统地介绍了国内外500kV电缆的发展历程,分析了国内500kV电缆发展的历程和特点。结合海淀工程的特点,从500kV电缆的电缆型式、电缆截面、电缆运输盘长和电缆蛇形敷设方式等方面,通过全面的数据计算和分析,得出了科学可行的结论,提出电缆应用方案；针对国内首次使用的国产电缆,本文通过对电缆结构的数据分析,从护套感应电压、电缆载流量、电缆绝缘厚度方面进行全面细致的计算,验证了国产电缆在实际工程项目中运用的可靠性；针对海淀工程电缆的实际情况,分析研究电缆线路的接地系统,提出科学可行的接地方式,并通过对护层保护器的深入研究,确定工程项目中的选型。
[Abstract]:With the continuous expansion of mega-cities in China, transmission distance and electricity consumption are increasing. The existing 220kV urban transmission network has been unable to meet the power supply requirements of mega-cities. Therefore, the use of limited space, It has become an inevitable trend to use large capacity 500kV power transmission cables to enter large cities directly. Haidian 500kV cable project is the second in China after Shanghai Jing'an project and the first long distance 500kV cable used in urban power network in Beijing. At the same time, Tsingtao Han cable and Jiangsu Anding accessories are used for the first time in large-section, long-distance 500kV voltage grade lines, creating a first example of domestic cables and accessories, which can improve the technical level of domestic cable industry. It is of great historical significance to gradually realize the localization of 500kV cables and accessories. This paper makes a full investigation on the current situation of 500kV cables, systematically introduces the development course of 500kV cables at home and abroad, and analyses the development course and characteristics of domestic 500kV cables. According to the characteristics of Haidian Project, from the aspects of cable type, cable section, cable transport tray length and cable snake laying mode of 500kV cable, the scientific and feasible conclusions are obtained through comprehensive data calculation and analysis, and the cable application scheme is put forward. Based on the data analysis of cable structure, the paper calculates the inductive voltage of sheath, the carrier current of cable and the thickness of insulation of cable, according to the domestic cable used for the first time in China. It verifies the reliability of the domestic cable used in the actual project, analyzes and studies the grounding system of the cable line, puts forward a scientific and feasible earthing method, and through the deep study of the protective device of the protective layer, according to the actual situation of the cable in Haidian project, analyzes and studies the grounding system of the cable line. Determine the type selection in the project.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM75

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本文编号：2220203