Differences between SCIG and DFIG Inertia Response

n this paper we studied the inertia response of SCIG and DFIG. With increased production capacity in wind farms, their role in power system stability has become important. SCIG and DFIG are used in wind turbin. DFIGs are variable speed generators and SCIGs are fixed speed generators. At first we simulated SCIG and DFIG in MATLAB simulink and compare them. The inertia response of a generator is influenced by the sensitivity of the generator’s electromagnetic torque to changes in the power system frequency. DFIG has low inertia response, we improved the inertia response of DFIG by adding feedback parameter as a function of the rate of the change of the grid frequency to reference electromagnetic torque.