Defining the damping properties of synchronous generator using disturbance measurements

Abstract

At present time complex generating unit models with a great number of parameters are implemented for the emergency control in power systems. Identification of these parameters is a challenging problem. State-of-the-industry measurement devices allow calculating electrical parameters during electromechanical disturbances. That is why one can use simplified generating unit models, parameters of which can be calculated using field measurements. In particular, generating units damping properties might be estimated. The proposed method involves the synchronous machine damping power estimation by means of the measurements approximation during dynamic disturbances. This value allows determining the generating unit capability to damp power system oscillations. The method was examined in MATLAB Simulink and by means of JSC “STC UPS” physical electrodynamic simulator. One can apply obtained results in the power system emergency control and in a wide variety of problems related to dynamic transients calculation and analysis.