考虑河道输水损失的大型泵站系统运行优化  

Optimal operation for large pumping station system based on water transferring losses of river

作　　者：冯晓莉 仇宝云 

机构地区：[1]扬州大学水利与能源动力工程学院,扬州225127

出　　处：《农业工程学报》2015年第17期35-41,共7页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金资助项目(51079125);江苏省自然科学基金资助项目(BK20130448);江苏省高校自然科学基金项目(13KJB570004)

摘　　要：大型泵站前池水位变化频繁且变化幅度较大时,机组经常偏离高效区运行,造成能源浪费。泵站系统中除了主机组、辅助设备和输变电设施消耗能量外,河道的输水水量损失和水力损失也综合成泵站所抽提水体的水能损失,进而影响泵站的运行性能。根据水源水位变化,在调水目的地水位一定的情况下,考虑河道输水水力损失与水量损失,首先分别确定调水目的地需要流量与泵站抽水扬程、抽水流量之间的关系,避免了优化计算过程中水位的重复迭代,极大减小了计算量与计算时间。以长江三江营最大潮差、平均潮差、最小潮差3个典型日为例,在南水北调东线淮安站站下水位及需要流量一定的情况下,以系统日运行费用最少为优化目标,建立优化模型,并采用模拟退火-粒子群算法（SA-PSO,simulated annealing-particle swarm optimization）求解,计算结果表明,与水泵设计角度运行方案相比,泵站系统实施变角优化运行,其运行费用可分别节约0.62%-2.26%、0.33%-3.26%和0.22%-0.83%。A large amount of energy is consumed during the pumping station operation, especially for the pumping station that water level of the forebay varied frequently in a wide range, pump units often run deviating from the high efficient area of pump, this results in energy waste. In order to lift water, some energy dissipation devices and flow facilities are used such as main pump unit, inlet and outlet passages, forebay and outlet sump, auxiliary equipments, power transmission and substation facilities, etc. Usually, the source water should be transported in a certain distance by the river or channel to the destination. Hydraulic loss and water loss of the river are integrated into power losses of the water. Further more, the operation performance of the pumping station is influenced. In this paper, hydraulic loss, evaporation loss and leakage loss were all considered. Based on variations of source water level, under certain water level of water transfer destination, the unknown water level, flow rate and river parameters could be obtained by the given parameter data based on energy conservation equation in fluid mechanics. Then, the relationships were determined respectively between demanding discharge of destination and pumping head, and between demanding discharge of destination and pumping discharge. The results showed that the relationships were nearly linear. Applying the linear relationships to the later optimization process in the algorithm, the repeated water level iteration was avoided. Also, the calculating amount and calculating time were reduced greatly. Taking three typical tidal level differences of maximum, mean, and minimum at Sanjisngying Intake of Yangtze River as a case, under certain water level and demanding discharge of Huai＇an pumping station downstream, the model was built based on the system concluding main pump units, auxiliary equipments, power transmission and substation facilities, and water transferring facilities. The optimizing goal was the least daily operation cost, and the constr

关 键 词：水 损失 优化 大型泵站系统 运行 输水 

分 类 号：TV675[水利工程—水利水电工程]