Rising load demand and possibilities of short interruptions either due to temporary faults or equipment switching may lead to transient instability in terms of growing oscillations and eventually result in cascaded outages if not being damped properly and timely. To dampen such oscillations, the power system stabilizers (PSS) are invariably installed to regulate the excitation of synchronous generators. In this research, a comparative analysis among the two design variants of PSS i.e., Lead Lag and PID, is performed by comparing the overshoot and settling time of generator active power after disturbance, to observe the effect of each on the system characteristics and nominal conditions. The settling time with PID based PSS is reduced by 46% in case of three phase short circuit fault and 80% in case of the single line to ground fault as compared to Lead Lag PSS. Thus, the results obtained show a better performance of PID based PSS having better overshoot response and reduced settling time for symmetrical and unsymmetrical faults.