Design of Reduced Order LADRC via Model Order Reduction Technique for Load Frequency Control in A Single-Area Power System

Abstract

The performance of a higher-order power system deteriorates due to the sudden load variations, structural discrepancy, and uncertainties involved in the parameters. Thus, an effective control technique must be employed to resolve the load frequency control (LFC) related issues in such systems. For the performance analysis of a higher-order system, a reduced-order controller is used for its reduced-order model because the full-order controller meets some structural and computational complexities. This paper proposes a reduced order linear active disturbance rejection control (RDLADRC) technique to deal with the LFC issues in a single-area power system. This technique successfully combines the benefits of the model order reduction (MOR) scheme and LADRC. Merits of the proposed approach are highlighted based on a deep comparative analysis of the reduced-order LADRC (RDLADRC) technique with full-order linear active disturbance rejection control (LADRC) and pre-existing two degree of freedom-internal model control (TDF-IMC) technique. The robustness of the proposed controller is investigated via system responses under parametric variations. MATLAB and simulation results confirm the effectiveness of the proposed scheme.