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The performance of doubly fed induction generator (DFIG) wind turbine systems is excellent under normal grid voltage condition. However, in an abnormal grid voltage condition, this will affect the back‐to‐back converter, DFIG, and the drive train, and it may even disconnect from the grid. This paper proposes control techniques for a back‐to‐back converter that can be operated under abnormal voltage...
This paper presents a control technique of power management in the stand alone hybrid system by using Flywheel Energy Storage (FES). FES helps the system to regulate the load power, when the generated energy from renewable source has less than consumed energy. FES supplies the insufficient energy to the load power while the generated energy source has greater than the load power; the excess energy...
This paper presents single phase AC electronic load with energy recovery (ELER), which is composed of a load emulator converter (LEC) and grid connected converter (GCC). The LEC uses the advantages of hysteresis current control to emulate the various load current shapes with excellent dynamic performance and powerful current limit capability. The energy from a load emulator is recovered by the d-,...
This paper proposes the control of a line side converter under unbalance voltage conditions for wind turbine system. The control technique is designed to operate under unbalance voltage by independent control between positive and negative components. The converter will regulate the DC link voltage at the specific value (650VDC). To verify an operation of the proposed control, the simulation is conducted...
This paper presents a grid connected squirrel cage induction generator (SCIG) driven by a back-to-back converter in variable speed wind turbine system. The back-to-back converter is composed of the machine side converter coupling to the line side connected together via DC bus capacitor. Both converters used the vector control and decoupling control in the d-, q-axis reference frame. The control objectives...
This paper presents the wind turbine control system composed of a dq-axis control of single phase grid connected converter with anti-islanding protection and a full bridge converter with MPPT controller. The single phase grid connected converter uses the advantages of a current control technique in the dq synchronous reference frame. By shifting the single phase to two phases and transforms to the...
This paper presents three methods of a three phase PWM boost rectifier connected to the grid via a single stage L filter, an undamp LCL filter and an active damp LCL filter. The first method is the simplest method uses the biggest size of single stage L filter. Although this method is straightforward, it increases the system size and weight and contains high frequency current components. The second...
This paper implements of a three phase grid synchronization for doubly-fed induction generators (DFIG) in wind generation system. A stator flux oriented vector is used to control the variable speed DFIG for the utility grid synchronization, active power and reactive power. Before synchronization, the stator voltage is adjusted equal to the amplitude of the grid voltage by controlling the d-axis rotor...
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