Parameter Coordinated Pre-tune of New Operational PSS Based on SAPSO

In order to guide field experiment of PSS parameters tuning and improve the dynamic security and stability level of power system, the PSS parameters of new invested units in B power plant was pre-tuned. To improve the optimization performance of PSO, a novel Self-adaptive Acceleration PSO (SAPSO) algorithm is proposed, which dynamically adjusts inertia weight and acceleration factor, and adds random mutation factor to searching process. Time domain simulations of single-machine infinity system and two-machine coordinated pre-tune system are studied and investigated. PSS parameter of new invested units is pre-tuned with the SAPSO algorithm under single and coordination mode. The results of simulation and field experiment indicate that the low-frequency oscillation of power system is effectively suppressed and the pre-tune method for PSS parameter of new invested units is effective and feasible.