Bakhtiar Badmasti - Young Researchers and Elites Club, Marivan Branch Islamic Azad University, Marivan, Iran
Hasan Bevrani - Department of Electrical and Computer Engineering University of Kurdistan Sanandaj, Iran

Nowadays power systems experience integrationof wind energy in the world electric networks. New problems andchallenges are created with high penetration of wind power. Oneof new problems is the frequency control. Double fed inductiongenerators (DFIGs) are most common type of wind turbines inthe modern power systems. Naturally, the DFIGs do notparticipate in the frequency control task; however they could beequipped with supplementary control loop. For the purpose ofinertial response and primary frequency control, necessarycontrol loops have been already designed. In this paper, asupplementary control loop is proposed for secondary frequencycontrol. This control loop uses a PI controller for restoration offrequency to the nominal value. To demonstrate the effectivenessof the proposal approach, it is examined on an updated IEEEnine-bus system.

Wind energy; inertial response; primary frequency