An optimal design to schedule the hydro power generation using lagrangian relaxation method

Abstract

This paper mainly deals with hydroelectric generation scheduling. It is formulated as a Mixed Integer Programming (MIP) model with respect to various constraints, electric power balance, water flows, hydro discharge limits and reservoir limits and then decomposed by Lagrangian Relaxation (LR) method. This method designs the schedule for the generating units which minimizes the generation cost. The objective of this scheduling algorithm is to obtain the schedule which gives the optimal amount of generated powers for the hydro units. Based on numerical calculations and graphical representations the optimal schedule can be obtained which reduces the production cost, increases the system reliability and maximizes energy capability of reservoirs. © 2012 Springer-Verlag GmbH Berlin Heidelberg.