Algorithm of optimal operation with adjustableblade and variable speed for pumping station
(1.College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China; 2.Jiangsu Surveying and Design Institute of Water Resources Co. Ltd., Yangzhou, Jiangsu 225009, China; 3.Water Conservancy Bureau of Huai′an City, Huai′an, Jiangsu 223001, China)
Abstract：A mathematical model of optimal operation with adjustableblade and variable speed for multiple pump units in pumping station was made and a decompositiondynamic programming aggregation method based on DPSA was proposed. With minimal daily electric consumption as the target, water quantity pumped by units as coordinated variable, the abovementioned model was decomposed into several submodels of daily optimal operation with adjustableblade and variable speed for single pump unit. The submodel took the blade angle and pump speed as decision variables, the discrete values of water quantity pumped by each unit as state variable, and was solved by applying DPSA. The constructed aggregation model took water quantity pumped by each pump unit as decision variable, the discrete values of water quantity pumped by pumping station as state variable, and was solved by dynamic programming method. Taking the operation of a pumping station as a case, the optimal operation of multiple pump units with adjustableblade and variable speed has average cost saving of 5.80%, 25.19% and 32.20% under 100%, 80%, and 60% loads respectively.
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