A Novel Method of FACTSPOD Design to More Enhancement of InterArea Mode Damping in a MultiMachine Power System

In this paper, a nontypical design method of flexible AC transmission systems power oscillation damping (FACTSPOD) controller is proposed to increase the efficiency of these devices. In all of the introduced FACTSPOD devices (taking IPFCPOD as an example), the supplementary controller is designed based upon a conventional approach (i.e., based on optimization algorithms) and using a different method can be useful. The graduated modal decomposition control (GMDC) is utilized as a specific strategy for POD controller design. Moreover, the dynamic model of the multimachine power system with the presence of IPFC devices has been developed. The obtained model is nonlinear; however, it is linearized around the operating point to design the controllers. The overall paper apos;s structure is based upon the two scenarios, in the first of which conventional method for IPFCPOD design has been analyzed thereupon the result compared with the introduced method in the second scenario. Finally, to ascertain responsive of the designed controller to load changes and stability of the system, the probabilistic sensitivity indices (PSIs) are investigated over a large set of operating conditions. As a verification, the timedomain simulations on a 10machine power system emphasize the analysis of dynamic results and their information under the considered conditions.