Questions & Answers of Power Generation Concepts

The fuel cost functions of two power plants are

Plant P1:C1=0.05Pg12+APg1+B

Plant P2:C2=0.10Pg22+3APg2+2B

where, Pg1 and Pg2 are the generated powers of two plants, and A and B are the constants. If the two plants optimally share 1000 MW load at incremental fuel cost of 100 Rs/MWh, the ratio of load shared by plants P1 and P2 is

The figure shows a two-generator system supplying a load of PD = 40 MW, connected at bus 2.

The fuel cost of generators G1 and G2 are :

C1(PG1)=10,000 Rs/MWh and C2(PG2)=12,500 Rs/MWh

and the loss in the line is Plosspu=0.5PG1pu2,where the loss coefficient is specified in pu on a 100 MVA base. The most economic power generation schedule in MW is

A load center of 120 MW derives power from two power stations connected by 220 kV transmission lines of 25 km and 75 km as shown in the figure below. The three generators G1,G2 and G3 are of 100 MW capacity each and have identical fuel cost characteristics. The minimum loss generation schedule for supplying the 120 MW load is

Three generators are feeding a load of 100MW. The details of the generators are

  Rating(MW) Efficiency (%)  Regulation (p.u.) on 100 MVA base
Generator-1 100 20 0.02
Generator-2 100 30 0.04
Generator-3 100 40 0.03

The incremental cost curves in Rs/MWhr for two generators supplying a common load of 700 MW are shown in the figures. The maximum and minimum generation limits are also indicated. The optimum generation schedule is