思林水电站通航建筑物机电设备选择研究

发布时间：2018-08-29 12:00

【摘要】：近年来,随着我国“西电东送”工程的建设发展,我国西部大批航电和水电枢纽工程都已相继开发并顺利投产发电。同这些水电枢纽工程配套的水上交通运输水利工程也随之逐步启动,并带动着国民经济的逐步发展。我国西部地区河流的来水量大多都随季节而变化,因河道狭窄,所以,大多水电枢纽工程均为高坝、大库型,对于河流流域的航运而言,升船机是最适应这类工程的通航建筑物,并在我国具有广泛的应用前景。本篇论文以位于贵州省东北部思南县境内的的思林水电站这一乌江流域典型的垂直升船机工程为背景,结合理论计算和其他类似工程的设计理念,着重对垂直升船机机械和电气设备的选择进行研究。思林水电站通航建筑物最终采用钢丝绳卷扬式升船机方案,其主提升设备规模较大,主要机械设备的设计和制造技术难度大。同时,通航坝段垂直升船机系统对整个供配电系统安全可靠性要求高,对主要电气设备参数及选型要求苛刻,对能影响到过坝船舶、乘客和货物安全的照明系统、接地系统以及通信系统等关键环节的要求也十分严格。本篇论文依据贵州省乌江流域航运规划的历史资料,结合国家相关规程规定,经分析论证后提出思林水电站通航坝段采用垂直升船机布置方案。在此基础上,对思林水电站通航建筑物垂直升船机中主要用电设备进行电气设计和论证,对主要电气设备进行初步选择或提出型式选择和参数选择的基本要求,确定了垂直升船机的用电负荷为一级重要负荷,为确保供电可靠性,应有3个相对独立的电源供电,同时应配备独立的柴油发电机组作为备用保安电源;主拖动系统采用全数字变频调速控制技术;垂直升船机配电变压器的容量应考虑负荷同时率,其阻抗选择应满足短路电流计算要求;照明灯具选择应根据思林水电站通航坝段过往船只的安全照度要求配置,满足船舶过坝及前方远距离水域照度要求;接地系统应同整个思林电站主体接地工程联结成一个整体,接地电阻值应能同时满足水电站工程和通航建筑物电气设备的安全接地;通信系统应能满足全天候气象条件下的通航船舶的正常安全运行。
[Abstract]:In recent years, with the construction and development of "West-East Power Transmission" project, a large number of avionics and hydropower hub projects in the west of China have been developed and put into production smoothly. The water transportation and water conservancy project, which is matched with these hydropower project, also starts step by step, and drives the national economy to develop step by step. Most rivers in western China vary with the seasons. Because of the narrow channel, most hydropower hub projects are of high dam and large reservoir type. For the navigation of river basin, Ship lift is the most suitable navigable building for this kind of engineering, and has a wide application prospect in China. This thesis is based on the typical vertical ship lift project of Wujiang River basin, which is located in Sinan County, northeast of Guizhou Province, and combines the theoretical calculation with the design idea of other similar projects. Emphasis is placed on the selection of mechanical and electrical equipment for vertical ship lift. Finally, the navigation building of Silin Hydropower Station adopts the scheme of wire rope hoisting ship lift, the main lifting equipment is large in scale, and the design and manufacture of main mechanical equipment is difficult. At the same time, the vertical ship lift system of the navigation dam section requires high safety and reliability of the whole power supply and distribution system, strict requirements for the parameters and selection of the main electrical equipment, and a lighting system that can affect the safety of the ship, passengers and cargo passing the dam. Grounding system and communication system and other key links are also very strict requirements. Based on the historical data of navigation planning in Wujiang River Basin of Guizhou Province and the relevant regulations of the state, this paper puts forward a vertical ship lift arrangement scheme for navigation dam section of Silin Hydropower Station after analysis and demonstration. On this basis, the electrical design and demonstration of the main electrical equipment in the vertical ship lift of the navigable building of Silin Hydropower Station are carried out, and the primary selection of the main electrical equipment or the basic requirements for the type selection and parameter selection are put forward. In order to ensure the reliability of the power supply, there should be three relatively independent power supply, and the independent diesel generator should be equipped as the backup security power supply. The main drive system adopts all-digital frequency conversion speed regulation control technology, the capacity of distribution transformer of vertical ship lift should consider load simultaneous rate, its impedance selection should meet the demand of short-circuit current calculation. The selection of lighting fixtures shall be arranged according to the safety illumination requirements of the passing vessels in the navigation dam section of the Silin Hydropower Station to meet the illumination requirements of the ship passing through the dam and the distant water areas ahead; the grounding system shall be connected into a whole with the whole main grounding project of the Silin Hydropower Station. The grounding resistance value should be able to meet the safety grounding of electrical equipment of hydropower station and navigable buildings, and the communication system should be able to meet the normal and safe operation of navigable ships under all-weather conditions.
【学位授予单位】：清华大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U642

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