Repeat Problem 12.14 if LFC is employed in area 2 alone. The area 2 frequency bias coefficient is set at B₂ =ẞ₁ = 600 MW/Hz. Assume that LFC in area 1 is inoperative due to a computer failure. (Reference problem 12.14) A 60-Hz power system consists of two interconnected areas. Area 1 has 1200 MW of generation and an area frequency response characteristic B₁ = 400 MW/Hz. Area 2 has 1800 MW of generation and B₂ =600 MW/Hz. Each area is initially operating at one-half its total generation, at Aptiel Aptic2 = 0 and at 60 Hz, when the load in area 1 suddenly increases by 400 MW. Determine the steady-state frequency error and the steady-state tie-line error Ap of each area. Assume that the reference power settings of all turbine-governors are fixed. That is, LFC is not employed in any area. Neglect losses and the dependence of load on frequency.