Analysis of power system linearized model with STATCOM based damping stabilizer

Power system stability enhancement with STATCOM-based damping stabilizers is investigated in this study. Previously, the power system linearized model with STATCOM was introduced by other authors. The linearizing method is considered in this paper. With attention to presence of STATCOM changes operating point, so the initial coefficients should be calculated with new operating point. In this study, The Coordination among the STATCOM internal AC and DC voltage controllers and AC-damping stabilizers has been taken into consideration. This aims to enhance both rotor angle stability and voltage regulation of the power system. The design of STATCOM parameters is considered as an optimization problem and GA is used for searching optimized parameters. These studies are performed for five operating points. The influence of STATCOM on stability is compared with eigenvalues analysis and simulation, in two cases of without STATCOM and with STATCOM. The nonlinear simulation results show the capability of this method for power system dynamic stability improvement.