Event‐triggered based decentralised control for frequency regulation of power systems

The present work focuses on the design of optimal proportional–integral–derivative with filter controller for the frequency regulation in single and multi-area thermal power systems considering effective utilisation of the network resources. The proposed strategy uses global neighbourhood algorithm (GNA), a meta-heuristic algorithm, to obtain optimal controller parameters. Since the controller, in load frequency control (LFC) systems, communicates via open channels there is a need for effective utilisation of channel bandwidth. Therefore, for effective communication, the decentralised adaptive periodic event-triggered scheme is adopted in this study. In order to find the appropriate values of sampling time and to study the effects of time-delay introduced by the communication channel, delay-dependent stability is investigated using Lyapunov theory. The theoretical concepts, developed in this study, are verified using the time-domain simulations carried out using MATLAB which validates the superiority of the GNA-based approach for LFC systems.