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Deadbands and the Dynamic Response and Performance of Large Water Transfer Canal System

Journal of Northeast Agricultural University(English Edition) 2009年第2期16卷 58-65页

作者： ding zhiliang wang changde tan guangming guan guanghua State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan University Wuhan 430072 China

An operating simulation mode for multireach canal system in series under gate regulating is established. The discharge feedforward plus water lever feedback PID controller was adopted. And the performance indicators are introduced to evaluate the control effects of canal operation. Influence on dynamic response process and dynamic performance as well as the control actions of canal system are studied according to the variation of the gate deadband and water level deadband. The results showed that the larger the gate deadband, the worse, the control effect of canal system over water level, and so done the stable process of gate discharge, yet the stable process of gate opening was getting better, while the upstream gate regulation of each canal pool was less at the time when canal stabilizes; the closer to downstream end of canal, the lager steady-state error of this canal pool was, and the lager influence of gate deadband on the steady-state error as well as response time of this canal pool was; the canal system can not acquire superiority in both the control performance and control actions when only the water level deadband was established.

关键词： canal operation deadband PID controller performance indicator dynamic response dynamic performance

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