SELF-TUNING LOAD FREQUENCY CONTROL - MULTILEVEL ADAPTIVE APPROACH

A multilevel adaptive load frequency control (LFC) based on the self-t uning regulator (STR) is investigated. The technique identifies each s ubarea separately as an autoregressive moving average submodel and par ameters are identified by using the recursive least-squares method. Th e parameters of the predicted submodel are used to ensure the subarea control error calculation. The application of the proposed algorithm i s suggested as a suitable alternative to the integral control used nor mally for the LFC. This work differs from previous work in that the pr oposed technique permits optimality at all levels while providing a de composed solution. The effectiveness of the control algorithm has been verified through numerical studies on the 20-machine, 118 bus IEEE te st system.