高扬程梯级泵站的运行效率评估模型研究

Research on Evaluation Method and Model of Operational Efficiency of High-lift Cascade Pumping Stations

针对高扬程梯级泵站运行效率评估困难的问题,通过综合考虑泵站效率、区间水量损失、水力损失、分流量、水位等多因素影响的基础上,提出了基于流量平衡的输水系统运行效率分析的方法,建立了针对配水区间的运行效率评估模型;另外,针对部分梯级泵站流量监测设备不完善的情况,提出了基于水量平衡的梯级泵站运行效率评估模型;将两个评估模型运用于甘肃景电一期工程的效率分析,计算结果表明,基于流量平衡的输水系统运行效率评估模型能够更客观地反映梯级泵站系统的运行效率状况,模型计算结果和工程实际的运行效率吻合良好。

On the basis of considering efficiency of pumping stations, range of water loss and flow rate and other factors, an analytical method of operational efficiency of water conveyance systems is put forward. It is targeted at the problem in the difficult assessment of system efficiency caused by more pump series, longer water conveyance distance, and inter-stage water level and flow rate con- stantly changes. Efficiency evaluation model of water delivery sections are established. Efficiency evaluation model of cascade pum- ping stations aims at no flow monitoring equipment because part of the cascade pumping stations is proposed based on water balance. The two evaluation model applied for the efficiency analysis of the first phase of projects in Jingdian, G-ansu Province. Calculation re suits show that the efficiency analysis model of water conveyance system based on the flow balance can more objectively reflect the state of operation efficiency of cascade pumping station systems. Model calculation results are in good agreement with the operational efficiency in engineering practice.