大型泵站水泵机组工况调节方式定量优化选择  

Quantitatively optimal selection on regulation mode of pump unit in large pumping stations

作　　者：冯晓莉[1] 仇宝云[1] 杨兴丽[1] 董波[1] 

机构地区：[1]扬州大学能源与动力工程学院,江苏扬州225127

出　　处：《排灌机械工程学报》2012年第6期683-689,共7页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(51079125);全国百篇优秀博士学位论文作者专项基金资助项目(2007B41);江苏省水利科技重点项目(2008048)

摘　　要：为了合理选择水泵机组工况调节方式,实现大型泵站优化运行,考虑机组起停机特性、安装维护性、可靠性等因素,在此基础上,针对优化运行功能,在保证抽水流量的前提下,以设备投资与运行总费用之和最小为目标,提出了定量选择水泵机组工况调节方式的方法.该方法综合考虑了泵站的扬程变化范围、运行时间、变工况优化运行、运行费用及设备投资.应用该方法对典型泵型的工况调节方式进行了优化计算,结果表明:当泵站运行扬程偏离高效区较多或扬程变幅较大时,泵站需要设置变角或变频变速工况调节机构.泵站年运行扬程分布不同,工况调节方式选择受到一定影响.设备费用降低后,泵站采用变角调节或变频变速调节的扬程适用范围增大,设置工况调节方式实现优化运行的效果更加显著.该方法为定量确定水泵机组工况调节方式提供了依据.In order to reasonably select a regulation mode of pump units and therefore to realize the optimal operation,a technical analysis was conducted under the consideration of the following factors as regulating system components,transient characteristics during start-up and shut down,installation and maintenance,reliability and applicability,and so on.Then,a method for quantitatively selecting the regulation mode of pump units was put forward,in which the total cost on equipment investment and pump units operation was minimized to allow the units to be operated optimally in a large pumping station.Nevertheless,head variation,operating time,variable operating conditions,equipment investments and operation cost were taken into account comprehensively in the method.For typical types of pump,their regulation model was optimized by using the method.The results indicate that it is necessary to install a blade angle adjusting device or pump rotational speed regulating instrument-frequency converter when either the operating head is much more deviated from the high efficiency zone of a pump unit or there is a larger variation in the head.Additionally,the head annual variation profile also has a certain influence on selection of the regulation mode.After the cost on instruments is reduced,the economical benefit caused from a realized optimal operation by means of either the blade angle adjusting device or rotational speed regulating instrument is even more considerable since the head can be varied in a significantly wide range.The method provides evident for quantitatively determining regulation mode of pump units.

关 键 词：水泵机组 调节方式 定量优化选择 扬程变幅 变角调节 变频变速调节 

分 类 号：S277.9[农业科学—农业水土工程] TV675[农业科学—农业工程]