Performance enhancement of ADRC using RC for load frequency control of power system

An effective decentralized load frequency controller (LFC) is proposed for an inter-connected two-area power system, for the purpose of regulating area control error (ACE) in the presence of uncertainties in system dynamics and external disturbances. The design is based on the concept of active disturbance rejection control (ADRC) with repetitive controller (RC). Estimating and mitigating the total effect of various uncertainties in real time, ADRC with RC is particularly effective against a wide range of parameter variations, model uncertainties, and large disturbances. Furthermore, with only two tuning parameters, the controller provides a simple, easy-to-use solution to complex engineering problems in practice. Here, an ADRC with RC-based LFC solution is developed for the power systems with non-reheat and reheat turbines. The simulation results verified the effectiveness of the ADRC with RC.