Rework Problems 12.15 through 12.16 when the load in area 2 suddenly decreases by \(300 \mathrm{MW}\). The load in area 1 does not change.

Problem 12.15

Repeat Problem 12.14 if \(\mathrm{LFC}\) is employed in area 2 alone. The area 2 frequency bias coefficient is set at \(\mathrm{B}_{f 2}=\beta_{2}=600 \mathrm{MW} / \mathrm{Hz}\). Assume that LFC in area 1 is inoperative due to a computer failure.

Problem 12.16

Repeat Problem 12.14 if \(\mathrm{LFC}\) is employed in both areas. The frequency bias coefficients are \(\mathrm{B}_{f 1}=\beta_{1}=400 \mathrm{MW} / \mathrm{Hz}\) and \(\mathrm{B}_{f 2}=\beta_{2}=600 \mathrm{MW} / \mathrm{Hz}\).