安康水电站库区淤积与库容测量研究

发布时间：2018-05-16 00:41

本文选题：GPS + 库容　；参考：《长安大学》2014年硕士论文

【摘要】：水位-库容-库水面积关系曲线和数表是进行水电站运行调度的重要依据，其准确性与否直接影响水库防洪、大坝与发电机组安全运营决策；水电厂发电量及其产生的经济效益。虽然在水电站设计与竣工时对其作本底测量后有了初值，但随着水库淤积，该数据将不断地产生变化。故定期对水库进行库容与淤积测量并与之前历次测量数据进行对比，求出新的水位-库容-库水面积关系曲线及库区淤积量是保证水电站安全运营和发挥最佳经济效益的重要基础。作者以安康水电站为对象，研究采用GPS实时动态定位技术与超声测深仪在导航软件控制下进行系统集成，测量库容与库区淤积的方法。针对本项目实际情况作了如下工作： 1.采用坐标变换方法将历次库区测量所使用的不同坐标系统资料及本次测量GPS定位使用的WGS84坐标统一到西安80坐标系下，，并在导航软件中使用RTK GPS实时定位功能，使测量船沿历次测量断面线行走。从而使得各次测量的断面数据具有可对比性。 2.采用高程拟合方法将WGS84的大地高拟合至库区调度使用的吴淞口高程系统，并以此作为库容与库区淤积测量的高程系统。 3.采用分段水位修正方法，在每日测量区域内设立水尺观测实时水位变化以修正测深断面高程。 4.采用动态初始化方法进行ＲＴＫＧＰＳ定位测量。从而将ＧＰＳ测相伪距实时动态定位作业模式用于测深点定位。使定位误差由ＧＰＳ测码伪距动态定位模式的±０.１ｍ提高到±０.０５ｍ。减小了由于平面定位误差引起的高程误差。 5.以所设计测量方法进行了安康水电站库容与淤积测量并对计算的库容进行了精度分析，为使用本次库测数据进行库区运行调度提供了可靠的依据。
[Abstract]:The relation curve and number table between water level, reservoir capacity and water area are the important basis for the operation and operation of hydropower station. The accuracy of the curve directly affects the flood control of reservoir, the safety operation decision of dam and generator set. Hydroelectric power generation and its economic benefits. Although there are initial values after the design and completion of the hydropower station, the data will be changed continuously as the reservoir silts. Therefore, the reservoir capacity and siltation are regularly measured and compared with previous survey data. Finding out a new relation curve between water level, reservoir capacity and reservoir water area and silting amount in reservoir area is an important basis to ensure the safe operation of hydropower station and bring into play the best economic benefit. Taking Ankang Hydropower Station as an object, the author studies the method of system integration with GPS real-time dynamic positioning technology and ultrasonic sounder under the control of navigation software to measure reservoir capacity and siltation in the reservoir area. In response to the actual situation of the project, the following work has been done: 1. The coordinate transformation method is used to unify the data of different coordinate systems used in the previous reservoir area survey and the WGS84 coordinates used in the GPS positioning of this survey to Xi'an 80 coordinate system, and the RTK GPS real-time positioning function is used in the navigation software. Make the surveying ship walk along the lines of each survey section. Thus, the cross-section data of each measurement can be compared. 2. The height of WGS84 is fitted to the Wusong Kou elevation system which is used in the dispatching of the reservoir area by using the method of height fitting, and it is used as the elevation system for reservoir capacity and siltation measurement in the reservoir area. 3. In order to correct the elevation of bathymetric section, a water gauge is set up to observe the real time change of water level in the daily survey area by using the method of section water level correction. 4. The dynamic initialization method is used to measure the RTK GPS position. Thus, the real-time dynamic positioning mode of GPS phase pseudo-range is used for bathymetric point location. The positioning error is increased from 卤0.1 m to 卤0.05 m in the pseudo-range dynamic positioning mode of GPS code. The elevation error caused by the plane positioning error is reduced. 5. The reservoir capacity and siltation measurement of Ankang Hydropower Station are carried out with the designed survey method, and the accuracy of the calculated reservoir capacity is analyzed, which provides a reliable basis for the operation and dispatching of the reservoir area by using this data.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV145;TV221

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