Measurement of the Flow in a 170 MW Hydraulic Turbine Recording the Pressure-Time Rise in One Section of the Penstock
Measurement of the Flow in a 170 MW Hydraulic Turbine Recording the Pressure-Time Rise in One Section of the Penstock
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DOI：
10.1115/fedsm2006-98529
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
F. Sierra;J. Kubiak;G. Urquiza;A. Adamkoski;W. Janicki;J. M. Fernández;M. Basurto
中科院分区：
文献类型：
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作者：
F. Sierra;J. Kubiak;G. Urquiza;A. Adamkoski;W. Janicki;J. M. Fernández;M. Basurto
本工作的目的是通过使用吉布森方法测量流量来评估液压涡轮机的性能，该方法基于记录压力管道一个部分中的压力-时间上升，并将其与压力管道连接的上水库中的压力相关联。体积流量由压差（断面与压力管道入口之间）的时间函数积分确定。由于压力管道入口的影响就测量误差而言可以忽略不计，因此可以通过这种方式进行流量测量。本文给出了用这种方法对一台170 MW水轮机涡轮机进行计算的结果。压力钢管的长度为300米。先前的经验和IEC-41-1991标准是采用和应用的标准。使用了一种高效、快速的采集系统，包括一个16位卡。使用开发的计算机程序计算流速，并在几种情况下进行测试。用吉布森法得到的结果用于校准基于Winter-Kennedy原理的在线流量测量系统。最后一种方法用于连续监测涡轮机流率。在计算了流量和输出功率之后，计算任何操作条件下的效率。提出并讨论了基于最高效率的最佳操作条件曲线。流量模拟允许对流量再循环区域尺寸进行估算。版权所有© 2006，ASME
The objective of the present work is to evaluate the performance of a hydraulic turbine by means of the measurement of flow using the Gibson method based on recording pressure–time rise in one section of the penstock and relate it to the pressure in the upper reservoir to which the penstock is connected. Volumetric flow is determined by integration of the time function of a differential pressure (between the section and the inlet to the penstock). Flow measurement was possible this way because the influence of penstock inlet was negligible as far as an error of the measurement is concerned. The paper presents the results obtained with this method for the case of a 170 MW hydraulic turbine. The length of the penstock was 300 m. Previous experience and a standard IEC-41-1991 were the criteria adopted and applied. An efficient and fast acquisition system including a 16 bit card was used. The flow rate was calculated using a computer program developed and tested on several cases. The results obtained with the Gibson method were used for calibration of the on-line flow measuring system based on the Winter-Kennedy principles. This last method is used for continuous monitoring of the turbine flow rate. Having calculated the flow rate and output power the efficiency is calculated for any operating conditions. A curve showing the best operating conditions based on the highest efficiency is presented and discussed. Flow simulation allowed having an estimation of a flow recirculation region size.Copyright © 2006 by ASME