Stabilizing Frequency and Voltage in Combined LFC and AVR System with Coordinated Performance of SMES and TCSC

In this paper, a refreshing tuning of proportional-integral-derivative (PID) controller in the combined effect of load frequency control (LFC) and automatic voltage regulator (AVR) by using differential evolution-artificial electric field algorithm (DE-AEFA). Error squared over integral (ISE) performance index is considered as fitness function for optimization. Moreover, DE-AEFA algorithm performance is compared with the classical algorithms like particle swarm optimization (PSO) and artificial electric field algorithms (AEFA). However, the secondary controller is not adequate to control the system deviations under large disturbances. So, an additional controller is necessary. For this, the system with coordinated control strategy of thyristor controlled series compensator (TCSC) and superconducting magnetic energy storage (SMES) devices has been implemented. Investigation reveals improvement in system dynamic response with TCSC injection. The combination of SMES and TCSC boosts up the system performance.