The Research Of PSS On Damping Lower Frequency Oscillation In The Power System

Now PSS(Power System Stabilizer)has been proved the most effective means to damp LFO(Low Frequency Oscillation)what also is the preferred measure recom -mended by the international Power Grid meeting,with the continuous expansion of Power Grid,LFO occurs more and more,so every country have put in the PSS device to strengthen system damp for damping LFO and to improve the dynamic stability of Power Grid.Excitation control system of generator has significant impact on stability of the static and dynamic and transient of the Power System.Due to we adopt the different models and parameters,so the calculation results of the Power Sytem will have much difference.Therefore,it needs mathematical models and parameters what can reflect the actual operation state of the equipment and can make the results reliable.As network of our Power System and project of "transmits electricity from west to east" implemented,it is put forward the higher claims to calculate the stability of Power System.New stabilization guidelines require using precise generator models and actual excitation system models and parameters in the calculation.In the paper,combining with the subject "PSS parameters design and field test of 9th generator in LanXi heating and Power Plant",the author has deep research of PSS on damping LFO,the parameter identification to excitation system,test methods, analysis calculation,so it achieves remarkable results through optimization field test again,calibrate parameters of the PSS in the tuning parameters.Combining with the thermal generator set of the Gansu Power System,the paper has the popularize value and real-life significance.