Online self-design and adjustment of power system stabilizers

The power system stabilizers (PSSs) are widely used in the power system to suppress the power oscillations. How to effectively set the parameters of the power system stabilizers (PSSs) becomes a vigorous topic discussed in many papers. In this paper, a new method is proposed for online self-design or self-adjustment of the power system stabilizers (PSSs) based on the tie-line power variation measured by Phasor Measurement Unit (PMU) in real time. If there is no PSS installed in the selected generator yet, self-design procedure of PSS is activated. If a PSS has already been installed in the generator, there comes to self-adjustment procedure of PSS. Once a low-frequency oscillation is detected, the parameters of PSS can be online designed or adjusted according to the current operating status of the power system in order to supply enough damping.