Abstract:In order to improve the efficiency of analysis forsubsynchronous stability of power systems

a quick analysis method based on thecomplex torque coefficient approach was proposed With the lack of mechanicaldamping data in engineering practice

this paper just adopted the stabilitycriterion of electric damping The IEEE first benchmark model was built byPSCAD/EMTDC software

and the author analyzed characteristics of thetraditional complex torque coefficient approach and its early optimizationmethod on the basis of the model And then an improved analysis method combiningthe frequency scanning method with test signal method was proposed Afterchanging the parameters of the IEEE first standard model

the author analyzedthe subsynchronous stability of the systems featuring different stabilityrespectively with the quick analysis method Finally

the author verified theanalysis results in combination with time domain simulation Through experiments

it is shown that the quickanalysis method is more timely than the complex torque coefficient approach inanalysis for subsynchronous stability