The effect of load models on unstable low-frequency oscillationdamping in Taipower system experience w/wo power system stabilizers

摘要

This paper uses the eigenvalue analysis approach to observe thenimpact of load models on an unstable low frequency oscillation damping,nwhich recently occurred in the Taiwan power system. In order to enhancenoscillation damping, the effect of load models on power systemnstabilizers is also investigated. Three kinds of the derived load modelsn(a dynamic model, a composite model, and an exponential model) based onnthe component approach with the measured characteristics of power systemnloads are used in this paper. Time simulation results are extensivelynused to verify the eigenvalue analysis results with and without powernsystem stabilizers. One set of field test data obtained from the Taiwannpower nuclear plant with power system stabilizers is used to determinenwhich load model provides a more accurate result in enhancement ofnoscillation damping. Depending on the results, the effect of load modelsnon electromechanical oscillation damping with and without power systemnstabilizers is verified