Power System Operation and Control

3.2 LONG RANGE HYDRO THERMAL SCHEDULING

Let a power system consist of one large hydel plant and one thermal plant say. The two plants cater to the total system load P_D.

Fig 3.1 A power system consisting of a hydel and a thermal Plant.

The hydro plant can generate power P_H more than power demand P_D for a limited time t. That is,

 

P_H,max ≥ P_D

 

However, the energy available from the hydro plant is insufficient to meet the load because of the water constraints.

Let t_max be the number of hours required for an optimization solution (week/month/year) say.

The hydro energy produced is less than total energy required. The difference in energy shall ...