Abstract
Recent steady increase of electric power demand causes power sources to be larger and further from cities. Wide area power interchange leads to make a power system larger and more complicated. The network is susceptable to poor damping power swing oscillations of relatively low frequency which influence to the whole system.
This paper describes a new developed generatot's double input signal PSS(P+ω input PSS) design method. Several power system conditions (power flow and/or power system network patterns) can be considered to satisfy a well-stabilized power system for each system condition. This method has major features as follows. (1) Weighting factor for eigen value sensitivity of oscillation mode is considered when PSS parameters are updated in a parameter optimization step.
(2) The new method provides a good result for generator local oscillation mode and inter-area mode under peak and off-peak power flow conditions.
