Performance Index-Based Coordinated Control Strategy for Simultaneous Frequency and Voltage Stabilization of Multi-area Interconnected System

This paper presents a new differential evolution-artificial electric field algorithm (DE-AEFA) for stabilizing frequency and voltage of combined load frequency control (LFC) and automatic voltage regulator (AVR) of a two-area hybrid system simultaneously. The proposed DE-AEFA algorithm is applied to optimize the gains of proportional-integral-derivative (PID) controller. The secondary controller in combined is optimized based on various performance indices and their combinations. Moreover, the secondary controller is not adequate to maintain the system stability during large disturbances. So, additional control devices are necessary to maintain system stable under large load variations. Therefore, redox flow batteries (RFBs) and interline power flow controller (IPFC) coordinated control strategy are used to damp out the variations in dynamic responses under large disturbances.