PSO-based Secondary Frequency Control and Active Power Sharing

Abstract

A novel secondary control for restoring the system frequency in a distributed manner with incremental cost based droop-controlled microgrids (MGs) is presented in this paper. The proposed control ensures the frequency restoration and accurately share the active power in an optimal way simultaneously. Stability analysis with state space modelling is completed with the proposed distributed secondary frequency controller (DSFC). The DSFC parameters are designed with particle swarm optimization (PSO) technique where the selection of DSFC parameters are considered as an optimisation problem for enhancing overall stability of the system. A test MG model in the MATLAB based simcsape platform is taken for modelling and simulation. The outcomes from the simulation confirms that the proposed DSFC can simultaneously restore the frequencies and optimal active power sharing while the optimal DSFC parameters reduce the overshoot and maintain the better stability for the system.