基于动态规划法的单级泵站日经济运行优化模型

为合理选择泵站机组在不同工况下的组合方式,实现单级泵站的运行优化。通过分析水泵运行效率与水泵流量、扬程以及转速间的相互关系,确定水泵装置的工况点,构建单级泵站日经济优化运行模型,以泵站日运行总费用最低为目标,通过动态规划法从而求解单级泵站的日经济最优运行方案。选定南昌市九圩港提水泵站为研究对象,依据泵站已有的运行数据,在综合考虑泵站日运行分时电价、扬程及流量变化的基础上,将该泵站优化运行模型分为两层,第一层为泵站日经济优化运行模型,确定泵站在一日内运行费用的最小值;第二层为泵站运行效率优化模型,确定在不同时段内泵站效率最优运行方式。结果表明,当日总输水量一定时,分时电价是影响泵站日经济运行费用和不同时段机组流量分配的主要因素;以九圩港泵站的典型工况为例,优化后的泵站运行方案较优化前日单位运行费用降低了18%。该模型对实现单级泵站日经济优化运行具有一定指导意义。

Daily Economic Operation Optimization Model of Single-stage Pumping Station Based on the Dynamic Programming Method

The operation optimization of single-stage pumping station is realized by the reasonable selection of the combination of pumping station units under different working conditions.By analyzing the relationship between the flow rate,head,speed and efficiency of the pumping device,the working condition of the pump device is determined,and the daily operation optimization scheduling model of the single-stage pumping station based on the dynamic programming method is constructed,with the goal of minimizing the total daily operating cost.Thereby the optimal daily scheduling scheme for the single-stage pumping station is determined.Jiuwei Port Pumping Station of Nantong Yanhuan Ding is selected as the research object.Based on the existing operating data of the pumping station,based on the comprehensive consideration of the daily electricity price,head and flow changes of the pumping station,the optimal operation model of the pumping station is adopted and divided into two layers,the first layer is the daily economic operation optimization model of the pumping station,and the minimum operating cost of the pumping station is determined.The second layer is the pumping station operating efficiency optimization model to determine the optimal pumping station efficiency in different periods.The operation model is solved by the interval discrete dynamic programming method.The results show that when the total water delivery volume is constant,the time-sharing electricity price is the main factor affecting the daily running cost of the pumping station and the flow distribution in each period.Taking the typical working conditions of the Jiu-wei-gang pumping station as an example, the optimized pumping station operation scheme is better. The operating cost per unit of the previous day is reduced by 18%. This model has some guiding significance for realizing the daily economic optimization operation of single-stage pumping stations.