DTC-SVM control strategy for induction machine based on indirect matrix converter in flywheel energy storage system

Flywheel energy storage system (FESS) improves the quality of the power transmitted to the grid by wind generators. Presently, FESSs, containing back to back converter and a direct torque control (DTC) that controlled induction machine (IM), are mainly considered for this kind of application. This paper investigates a low-speed FESS with DTC_SVM control strategy for an IM based on indirect matrix converter (IMC). In this system, DTC-SVM increase efficiency of the energy storage system and facilitate the active power output of the wind farm by providing situation to shift quickly and repeatedly between motoring and generating operation modes in induction machine. The space vector modulation (SVM) strategy in indirect matrix converter provides full control of both the output voltage vector and the instantaneous input current displacement angle. The reference power of the FESS that used as the input of the system can be obtained by calculating the active power of wind farm and the target power. The model of the system is simulated in SIMULINK/MATLAB software for different FESS operations such as: charge, discharge and standby modes. The results of simulation show effectiveness of the proposed strategy.