Inter-area and Intra-area Oscillation Damping of Power System Stabilizer Design Using Modified Invasive Weed Optimization

This paper investigates the effective control of power system stabilizers (PSSs) for damping power system oscillations in case of intra-area and inter-area oscillations. The PSSs provide an effective supplementary control as an auxiliary control action to the excitation system of the generators to improve the overall efficiency in this direction. However, to be robust in performance, the optimum parameter setting of the PSS design parameters is indispensible to handle various disturbances and abnormal conditions. Even though lot of research has been successfully undertaken, yet this issue still requires an optimal strategy to address the design and operation of multiple PSS in the power system. To be more effective and robust in performance, a modified invasive weed optimization (IWO) technique is proposed for optimal tuning of PSS parameters. Comparative result analysis indicates a superior result in comparison with conventional techniques. Different case studies with respect to various types of disturbances are tested for justifying a better performance of the proposed approach. The stability and transient analysis in terms of time domain simulations are presented.