Frequency Stability Study in Electrical Power System with SMES and TCSC units

This research explicates the load frequency control (LFC) of a power system using a classical proportional, integral, and derivative (PID) controller. Due to the sporadic nature of load pattern, and parametric uncertainties, the power imbalance in the system forces the frequency to oscillate errantly in the network. To enhance the power, and voltage profile, TCSC is integrated in the tie-line. Along with this, to compensate the active power instantly, and in turn to stabilize the oscillatory frequency, SMES is injected in the tie-line. So, a reliable and well-designed secondary controller is necessary to improve the power quality. In this work, PID controller and PID assisting with a filter (PIDF) are designed using symbiotic organism search algorithm (SOSA). To eliminate the noise content from the controller due to TCSC, and SMES or externally, a derivative filter is coordinated. Further, the sensitivity, reliability, and credibility of the proposed controller is inspected by forcing a time variant step load.