| This article has been：Browse 1251Times Download 955Times |
|
|
|
| DOI： |
|
| Simulation for PID Controller of Modified Integral and Differential on Tandem Canal System |
|
HUANG Kai, GUAN Guanghua, LIU Dazhi, MO Zhenning
|
|
State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China；Guizhou Survey and Design Research Institute for Water Resources and Hydropower, Guiyang 550002, China
|
| Abstract: |
| Automatic operation is an effective way to improve the utilization efficiency of water resource on canal system. The basic idea is to maintain channels of water level and flow rate in a certain target state through real-time adjustment of the gate. Differential link of classic PID control algorithm easily leads to excessive overshoot and even system instability, therefore PI controller without differential stage is commonly used in canal system. In order to improve the system response speed and reduce regulating action, starting threshold in the stage of the integral, with inertial factor for differential stage to improve the classic PID algorithm was introduced. Simulation was carried out for standard test cases from ASCE. Results showed that the modified algorithm could reduce the over shoot and decrease the adjustment of gate compared with traditional PID algorithm, and improve the system’s response speed in contrast to PI algorithm. |
| Key words: PID algorithm; unsteady flow; automatic control; canal operation |
|
|
