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DPSA method based optimal operation of single pump unit for Jiangdu No.4 Pumping Station |
Zhang Lihua1, Cheng Jilin1, Zhang Rentian1,2, Qiu Jinxian1, Gong Yi1 |
(1.College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China; 2.Jiangsu Surveying & Design Institute of Water Resources Co. Ltd., Yangzhou, Jiangsu 225009, China) |
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Abstract A DP mathematical model combined optimal operation with adjustableblade and variable speed was presented.The peak valley electricity prices and suction level fluctuation affected by tidal levels were taken in account in the model. The objective function was to take minimal electricity energy consumption cost of daily operation. The decision variables were the setting blade angle and rotational speed of pump unit in each time period and the constraint conditions were water volumes pumped in given times. The optimization method DPSA was applied to solve the optimal operation mode. One case was studied by comparing the state of combination optimal operation with the operation in constant blade angle and rotational speed of Jiangdu No.4 Pumping Station. The calculation results show that with the constraint conditions of typical tidal process which are average tidal levels from December to February of next year, designed average pumping head of 7.8 m~3.8 m, and the operation load at 100%,80%,60% of fullload(the water volume when the pumps working with the blade angle of 0 degree and the speed of 150 r/min in a full day), the optimization effect of combination optimal operation with adjustable blade and variable speed reaches 0.99%~35.00% compared with the operation in constant blade angle and rotational speed. Without considering the peak valley electricity prices, the number is 0.26%~17.23%, which gives a new way to the optimization of Eastern Route Project of South to North Water Diversion.
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Received: 27 February 2010
Published: 30 September 2010
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