Fumio Wakamori

Layered Network Model Approach to Optimal Daily Hydro Scheduling

The objective of daily hydroelectric scheduling is to generate power as much as possible in accordance with changes in electricity demand under highly constrained conditions. A highly efficient layered network model is proposed and applied to the Kiso river hydroelectric system, which is one of the most complicated hydropower systems in Japan. First, the practicality of the proposed model is demonstrated by its ability to cope with power increases at peak demand periods, and second by the easy handring of its major operational constraints and objectives.

Optimal Operation of a Multireservoir During Flood Periods

Abstract The main problem in applying conventional multireservoir operation principles lies in the difficulty of precise inflow prediction. In this paper, an optical multireservoir operation principle with real-time correction for inflow prediction error is proposed. The optical regulator design method is applied in order to utilize its state feedback characteristics. Results of numerical analysis show that the peak flow of the flood can be decreased and the occurence of the peal: delayed. Moreover, real-time correction of the discharge rate decreases the unexpected water level rise, even when the inflow prediction error is significant.

Development of a Reservoir Control Method with the Aid of Unsteady Flow Dynamics Simulation

Abstract A method of designing a reservoir control system which uses unsteady flow dynamics simulation is described. The effect of water level fluctuation on reservoir control can only be evaluated through analysing unsteady flow dynamics. A numerical analysis approach is chosen because of the difficulty in solving the unsteady flow dynamics equation analytically. A special purpose FORTRAN simulation system named RCSS, i.e. River Control Simulation System, is developed. In this system the numerical analysis program of the unsteady flow dynamics equation is installed. With the aid of RCSS, a new reservoir control method is derived. This method makes it possible to maintain water volume at a desired value. Kalman filters are used to get the closest estimate of water volume due to corruption of water level data by various noises. This newly developed control method has proven effective in reservoir control.

DEVELOPMENT OF A RESERVOIR CONTROL METHOD WITH THE AID OF UNSTEADY FLOW DYNAMICS SIMULATION

A method of designing a reservoir control system which uses unsteady flow dynamics simulation is described. The effect of water level fluctuation on reservoir control can only be evaluated through analysing unsteady flow dynamics. A numerical analysis approach is chosen because of the difficulty in solving the unsteady flow dynamics equation analytically. A special purpose FORTRAN simulation system named RCSS, i.e. River Control Simulation System, is developed. In this system the numerical analysis program of the unsteady flow dynamics equation is installed. With the aid of RCSS, a new reservoir control method is derived. This method makes it possible to maintain water volume at a desired value. Kalman filters are used to get the closest estimate of water volume due to corruption of water level data by various noises. This newly developed control method has proven effective in reservoir control.