Abstract: In the paper, based on a combination of
the robust control approach and an adaptive
control technique, a design procedure of a new
robust adaptive controller is proposed for power
system load-frequency control with system parametric uncertainties. The system parametric uncertainties are obtained by changing parameters by
30% to 50% simultaneously from their typical
values. In the design of the proposed controller,
only the bounds of system parameters are
required. The motivation of combining the robust
control with an adaptive control is to use the
robust control approach to deal with the small
parametric uncertainties and to use the adaptive
control for large parametric uncertainties so that
stability of the overall system and good performance can both be achieved for all admissible
uncertainties. Our simulation results demonstrate
that for the example system the proposed loadfrequency controller can achieve good performance even in the presence of the generation
rate constraint (GRC)