Decentralized active disturbance rejection Control for LFC in deregulated environments

In this paper, linear active disturbance rejection Control (LADRC) method is applied to design decentralized load frequency controllers (LFC) for multi-area power systems in deregulated environments. LADRC can treat the connections between one area and the rest of the system and the effects of possible contracts as a set of new disturbance signals, and it can compensate quickly after estimating them. Thus, it can achieve good disturbance rejection performance and be a good candidate for LFC design. The proposed method is tested on a four-area power system. Simulation results show that the proposed design method is simple to apply in practice and can achieve good performance. However, anti-windup problem for LADRC needs to be further investigated.