Power System Operation and Control

COMPETITIVE EXAMINATION QUESTIONS

1. The power generated by two plants are: P₁ = 50 MW, P₂ = 40 MW. If the loss coefficients are B₁₁ = 0.001, B₂₂ = 0.0095 and B₁₂ = –0.0005, then the power loss will be                 (IES 1997)

    

   1. 5.5 MW
   2. 6.5 MW
   3. 4.5 MW
   4. 8.5 MW
2. In terms of power generation and B_mm coefficients, the transmission loss for a two-plant system is (Notations have their usual meaning)                (IES 2000)

    

   1. P²₁B11 + 2P₁P₂B₁₂ + P²²B₂₂
   2. P²₁B11 – 2P₁P₂B₁₂ + P²₂B₂₂
   3. P₂²B11 + 2P₁P₂B₁₂ + P₁²B₂₂
   4. P²₁Bn + P₁P₂B₁₂ + P²₂B22
3. Two power plants interconnected by a tie-line as shown in the below figure have loss formula coefficient B₁₁ = 10^–3MW^–1. Power is being dispatched economically with plant ‘1’ as 100 MW and plant ‘2’ as 125 MW The penalty ...