Two-step optimal operation and control method for long distance gravity-flow delivery in canals

HAN Yan-cheng; GAO Xue-ping

A new two-step control method based on the principle of optimality is proposed for the gravity-flow in open channel system.The first step is to control all the levels (or volumes) in the channel to reach the goal levels (or volumes).The second step is to adjust the channel flow of all sections to realize the stabilized level.The optimization flow control model is built,which make the levels reach the goal levels in the shortest time.The corresponding constraints for this model,the downstream water demands,the maximum water levels,the allowable drawdown rate of water level,the allowable discharge capacity of the channel,the minimum frequent of switching on and off the pump,and so on,are constituted.The solution to the problem is proposed by using linear the program method or decomposing a large and complex system into two or three small and simple systems.The example application of this method shows that the time during which the water levels reach the target levels and keep them stable can be reduced from a few days to a few hours.

School of Constructional Engineering, Tianjin University, Tianjin 300072, China

Received Date: 2004-12-10

Rev Recd Date: 2005-03-08

Publish Date: 2006-05-25

Key words:

Abstract: A new two-step control method based on the principle of optimality is proposed for the gravity-flow in open channel system.The first step is to control all the levels (or volumes) in the channel to reach the goal levels (or volumes).The second step is to adjust the channel flow of all sections to realize the stabilized level.The optimization flow control model is built,which make the levels reach the goal levels in the shortest time.The corresponding constraints for this model,the downstream water demands,the maximum water levels,the allowable drawdown rate of water level,the allowable discharge capacity of the channel,the minimum frequent of switching on and off the pump,and so on,are constituted.The solution to the problem is proposed by using linear the program method or decomposing a large and complex system into two or three small and simple systems.The example application of this method shows that the time during which the water levels reach the target levels and keep them stable can be reduced from a few days to a few hours.

HTML

Reference (9)

[1]	Buyalski C P,Falvey H T,Rogers D S.Canal systems automation manual Volume I[M].Denver Colo:US Bureau of Reclamation,1991.
[2]	Ploss L.Canal automation using the electronic filer level offset (EL-FLE) method[A].Planning,operation,rehabilitation,and automation of irrigation water delivery systems[C].edited by Zimbelman,New York:ASCE,1987.
[3]	Chevereau G,Schwartz-benezeth S.BIVAL system for downstream control[A].Planning,operation,rehabilitation,and automation of irrigation water delivery systems[C].edited by Zimbelman,New York:ASCE,1987.
[4]	David C,Rogers,Jean Goussard.Canal control algorithms currently in use[J].Journal of Irrigation and Drainage Engineering,1998,124(1):11-15.
[5]	Harald D,Frederiksen.Design of California Aqueduct[J].Journal of Irrigation and Drainage Engineering,1968,95(IR2):307-328.
[6]	Balogun,Hubbard.Automatic Control flow using linear quadratic regulator theory[J].Journal of Hydraulic Engineering,1988,114(1):75-101.
[7]	Jean-Lue Deltour,Franck Sanfilippo.Introduction of Smith Prediction into Dynamic Regulation[J].Journal of Irrigation and Drainage Engineering,1998,124(1):11-15.
[8]	Dewey H G,Madsen W B.Flow control and transients in the California Aqueduct[J].Journal of Irrigation and Drainage Engineering,1976,102(IR3):335-348.
[9]	林延江,陆昌甫,朱光熙,等,水利土木工程系统分析方法[M].北京:水利电力出版社,1983.

Two-step optimal operation and control method for long distance gravity-flow delivery in canals

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Article Metrics

Proportional views

Related