南水北调东线高港泵站优化运行方案研究

Study on optimal operation schemes of Gaogang Pumping Station in Eastern Route of South-to-North Water Transfer Project

由于南水北调东线工程的高港泵站受长江潮位影响,其扬程变化频繁、变化幅度大,且同时安装有变角和不变角两种不同水泵,因此对不同的日总抽水量,以泵站运行费用最少为目标,建立优化模型。在考虑分时电价影响的基础上,研究了5种不同变角和变速条件组合的泵站优化运行方案,求解确定了泵站各时段的开机台数和机组运行工况。计算结果表明:5种优化运行方案中,1—3号机组变速、4—9号机组变速-变角优化运行方案节省电费效果最为显著;较现行的抽水流量一定的1—9号机组在设计角度运行方案节约电费13%～32%。

Gaogang Pumping Station in Eastern Route of South-to-North Water Transfer Project is influenced by tidal level of the Yangtze River,its working head varies frequently within wide ranges,and two different pump types with full adjusting blade and half adjusting blade are installed.optimization models were built for different pumping volume of water per day,aiming at the least operation cost,on the basis of considering time-varying electrical prices.Operation schemes of the pumping stationthe were studied with five combinations by the function of adjusting blade angles and adjusting rotational speeds.The number of running pump units and pump unit operation duties were determined on different period of time.The results indicate that among the five optimal operation schemes,the electrical cost of the schemes with the combination of No.1～3 pump units by adjusting rotational speed and No.4～9 pump units by adjusting rotational speed and blade angle is the best,which is 13%～32% less than that of current schemes with No.1～9 pump units maintain on design blade angles under the circumstance of pumping certain discharge.