EE 340 Economic Dispatch of Power

Generation

G1 G2 G3

System

Incremental cost curves

975 $9.163/MWh

9.16

9.16

9.16

975 = 450 + 315 + 210

483 MW

305 MW

187 MW

Upper limit violated: → P1= 450 MW → solve the dispatch problem with two generators: P2 + P3 = 525 MW → λ = $9.4/MWh → P2 = 315 MW → P3 = 210 MW

lossPPPP

PP

PP

PP

150

),014.8.6)(000358.1

1(

)018.3.6)(000456.1

1()016.7(

)000436.1

1(

321

3

3

2

2

1

1

Results (obtained numerically):

• P1 = 35.1 MW • P2 = 64.1 MW • P3 = 52.5 MW • Ploss = 1.7 MW • Pdemand = 150 MW