Introduction of Smith Predictor into Dynamic Regulation

Abstract

The architecture of Dynamic Regulation implemented in the Canal de Provence since 1971 consists of open loop/closed loop coupling. In addition, to take into account the interactions between the different reaches of a canal, Dynamic Regulation reports a fraction of the downstream check structure correction to the upstream check structures. While keeping the same well-tried logic, a research and development program has been pursued by the Société du Canal de Provence (SCP) since the mid-1980s, in which the closed-loop module has been improved. A Smith predictor controller adapted to delayed systems has been introduced to control the downstream level of canal reach by adjusting the discharge upstream of the reach. A module has been introduced in the controller to adapt the control parameters on line and in real time after evaluation of the canal operating point (discharge and downstream level). This approach allows one to solve the hydraulic nonlinearity problem. The synthesis of the controller follows the so-called pole placement approach. At the end of the paper, this new controller's performances are analyzed as per the specifications of the ASCE Task Committee on Canal Automation Algorithms.