Question 4 a) For economical load dispatch, knowing load frequency operation and control is paramount to maintain grid stability. Considering an isolated power system which has the following parameters; the load varies by a percentage change in frequency. Rated capacity of the area 2000MW Nominal operating load 1000MW Inertia constant of the area 5.0s Speed regulation of all regulating generators 4% Turbine time constant 0.3s Damping constant 1.0% If the Governor Time constant delays 0.22s to the Turbine time constant at a sudden change in load of 20MW, use a mathematical approach to conclude on the steady state frequency deviation without a controller.