平潭海峡大桥桥上高压电缆工程设计

发布时间：2018-11-19 15:30

【摘要】：随着近些年我国改革开放的步伐加快,政府提出了建设“资源节约型、环境友好型”“和谐社会”的倡议,国家电网公司也加强了输电线路工程建设的要求。在其指导精神下,各种“新技术、新材料、新工艺”被广泛应用于电网建设中。随着中国经济的快速发展,对于的区域规划更加细化,各级政府对海岛的开发开放已日渐升温,海岛的区域地位也越来越重要了。目前,全国多个海岛已被规划为新兴的综合试验区、开发区、港口码头等,而交通便利已成为海岛开发开放的先行条件。因此,各级地方政府常常兴建交通桥梁以连接海岛与大陆的通道,这也为我们解决长期困扰海岛的电力输送问题提供了一种全新的途径。相对于海底电缆敷设模式,利用交通桥梁敷设电力电缆,可突破无大截面海缆造成的输送容量限制。同时桥梁上可采用常规电缆,具有很高的经济性；同时通过大桥敷设电力电缆,也为日后电缆检修和维护提供通道,大大提高了电缆运行的可靠性。本文重点研究桥上高压电缆相关技术特性,开展大桥震动对电缆的传达率、电缆在温度变化、桥梁伸缩情况下的伸缩性能、震动与热伸缩影响下的金属套长期应力疲劳、交通桥梁上敷设高压电缆线路的电磁环境影响、高盐雾环境下桥架结构材料选型及防腐方案研究以及电缆在大桥环境下的运行寿命等方面的分析研究。本文首先结合国内已有的类似工程进行了调查研究,并结合自身的工程特点,论证了电缆的选择标准,确定特有的电缆结构以及接头形式,并通过分析电缆线路故障的原因,提出了防止电缆线路故障的安全措施。与此同时,根据桥梁的特点,文章的设计内容还包含了桥上电缆的防震措施、伸缩性能、高盐雾环境的桥架结构以及防腐等方面的设计,并对交通桥梁敷设高压电缆的电磁环境影响等做了细致的分析。作为交通桥梁敷设高压电缆的典型案例,一方面需解决高压电缆对交通桥梁的影响,以满足公共区域的安全要求；另一方面,需要从技术上解决交通桥梁的特有性能对高压电缆的影响,以保证电网的安全运行。该工程将为未来岛屿电源供应提供了一种全新的模式,有一定的借鉴价值。
[Abstract]:With the quickening pace of reform and opening up in China in recent years, the government has put forward the initiative of building a "resource-conserving, environment-friendly" harmonious society ", and the State Grid Company has also strengthened the requirements of the construction of transmission line projects. Under its guiding spirit, various "new technologies, new materials and new processes" are widely used in power grid construction. With the rapid development of China's economy, the regional planning has become more detailed, and the governments at all levels have become more and more open to the development of the islands, and the regional status of the islands has become more and more important. At present, many islands in China have been planned as new comprehensive experimental areas, development zones, ports and wharves, and convenient transportation has become the leading condition for the development and opening of islands. Therefore, local governments at all levels often build bridges to connect the islands with the mainland, which provides a new way for us to solve the power transmission problem that has plagued the islands for a long time. Compared with submarine cable laying mode, using traffic bridge to lay power cable can break through the transmission capacity limit caused by no large section submarine cable. At the same time, the conventional cable can be used on the bridge, which has a high economy. At the same time, laying power cable through the bridge also provides a channel for cable maintenance and maintenance in the future, which greatly improves the reliability of cable operation. This paper focuses on the related technical characteristics of high voltage cable on bridge, the transmission rate of bridge vibration to cable, the temperature change of cable, the extensibility of cable under the condition of bridge expansion and expansion, the long term stress fatigue of metal sleeve under the influence of vibration and thermal expansion. The influence of electromagnetic environment on the laying of HV cable lines on traffic bridges, the selection of structural materials and anticorrosion schemes of bridge frame under high salt fog environment, and the analysis and study on the service life of cables in the environment of bridges are analyzed and studied. In this paper, the author first investigates and studies the similar projects in China, and proves the selection standard of cable, determines the unique cable structure and joint form, and analyzes the causes of cable line faults. The safety measures to prevent the fault of cable line are put forward. At the same time, according to the characteristics of the bridge, the design content of the paper also includes the seismic protection measures of the cable on the bridge, the extensibility, the bridge frame structure in the high salt fog environment and the anticorrosion design, etc. The electromagnetic environment effect of high-voltage cable laid on traffic bridge is analyzed in detail. As a typical case of laying HV cables in traffic bridges, on the one hand, it is necessary to solve the influence of HV cables on traffic bridges in order to meet the safety requirements of public areas. On the other hand, it is necessary to solve the influence of the special performance of the traffic bridge on the HV cable technically, so as to ensure the safe operation of the power grid. This project will provide a new mode for future island power supply, which has certain reference value.
【学位授予单位】：福州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM75

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