5.5 DYNAMIC RESPONSE

This gives the variation of frequency with respect to time for a given step change in load demand.

∆F(S) → Laplace transform of change in frequency

ƒ (t) → Inverse Laplace transform of ∆F(S).

Time constant of load frequency control follow the relation T_g < T_t < T_p Block diagram of ALFC:

Fig 5.8 Single area LFC

T_g = T_t = 0 and K_tK_g ≈ 1

Taking partial fractions,

Fig 5.9 Single area control model for dynamic response

taking inverse LT