Short-term hydro scheduling with cascaded and head-dependent reservoirs based on mixed-integer linear programming

J. García-González, G. Alonso Castro

IEEE PowerTech Conference - PowerTech 2001, Porto (Portugal). 10-13 septiembre 2001

Summary:

The aim of this paper is to determinate a feasible operation of the hydro units belonging to the same hydro chain, trying to meet an hourly power demand assigned previously, and accomplishing the initial and final reservoir level conditions which are long-term signals considered as input data. The hydro scheduling problem has a non-linear character. In this paper we present a new approach where the non-linear input-output surfaces are linearised using binary variables. The proposed formulation allows considering explicity the relation among the electrical power, the net head and the turbine water discharge. This way, the optimal schedule can be obtained solving directly an optimization problem. A numerical test of a three cascaded and head dependent reservoirs for a 24 hours planning horizon is presented.

Keywords: Hydro subproblem, net head effect, optimization, short-term hydro-termal coordination, cascaded reservoirs

DOI: 10.1109/PTC.2001.964906

Publication date: September 2001.

Citation:
García-González, J., Alonso Castro, G., Short-term hydro scheduling with cascaded and head-dependent reservoirs based on mixed-integer linear programming, IEEE PowerTech Conference - PowerTech 2001, Porto (Portugal). 10-13 September 2001.

IIT-01-035A