Research on the Optimal Operation of Single Adjustable-blade Pump Unit in Pumping Stations According to Different Drainage Scenarios

As drainage pumping station plays an important role in regional drainage,it is of great practical significance to study the optimal operation of drainage pumping station. In this paper,according to the different drainage scenarios（such as daily drainage,superstandard drainage,pre-lowering water-level stage and emergency drainage stage）,a nonlinear optimization model of single adjustable-blade pump unit is constructed,with the multi-objective of maximum water discharge and minimum power consumption cost in a certain time. Then onedimensional dynamic programming method is used to solve the model,and a series of optimal decision schemes corresponding to different costs are obtained,including shutdown,startup and blade angle in every period,and maximum water discharge and unit cost drainage. Taking the daily operation optimization of single unit in drainage pumping station as an example,the influences of different shutdown constraints on the results of variable angle optimization are analyzed,and the optimal operation suggestions are put forward respectively for different drainage scenarios,including daily drainage,super-standard drainage,pre-lowering water-level stage and emergency drainage stage. The research conclusion provides a decision-making reference for the optimal scheduling scheme of drainage pumping station in flood seasons.