基于遗传程序的南水北调中线节制闸过闸流量计算模型研究

Research of discharge calculation model based on genetic programming applied to South-to-North Water Diversion Middle Route Project

南水北调中线线路长,沿线分水口门多,且无在线调蓄水库,输水调度技术难度大。输水调度通过调整总干渠沿线各节制闸过闸流量,以满足分水口门的供水需求。目前中线过闸流量计算采用传统水力学经验公式,需根据实测水情数据,定期人工修正公式中参数,灵活性差。本文通过南水北调中线输水调度实践,建立了基于遗传程序结合水力学方法的过闸流量模型,根据实测流量计算流量系数,并利用遗传程序自动拟合节制闸的闸前水位、闸后水位、闸门开度与流量系数的非线性关系,进而实现过闸流量计算。经在南水北调中线节制闸的试用表明,该模型具有很强的自适应能力,灵活性强,拟合精度较高,而且较好地避免了直接拟合流量时泛化能力较弱的不足,具有较强的实际应用和推广价值。

South-to-North Water Diversion Middle Route Project is a linear project which has none regulat-ing reservoirs and many water diversion gates,very difficult to dispatch. Calculation for flow rate is impor-tant to water dispatch which is used to adjust flow rate in order to achieve water plan,At present,calcu-lating methods involves traditional hydraulics formula and manual parameter calibration which is inflexible.The paper established discharge model based on genetic programming which is used in South-to-North Wa-ter Diversion Middle Route Project to calculate flow rate automatically. The results showed the model hasstrong adaptability,flexibility and high fitting accuracy.