Wind energy conversion systems have been attracting wide attention as a renewable energy source due to depleting fossil fuel reserves and environmental concerns as a direct consequence of using fossil fuel and nuclear energy sources. Wind energy, even though abundant, varies continually as wind speed changes throughout the day. The amount of power output from a wind energy conversion system (WE...

Variable speed operation is essential for large wind turbines in order to optimize the energy capture under variable wind speed conditions. Variable speed wind turbines require a power electronic interface converter to permit connection with the grid. The power electronics can be either partially-rated or fully-rated [1]. A popular interface method for large wind turbines that is based on a par...

In this paper, a comparative analysis of Total Harmonic Distortion (THD) between wind farms with double-fed induction generators (DFIG) and synchronous permanent magnet (PMSG) integrated into the grid is developed. The Fast Fourier Transform (FFT) technique to evaluate output current signal THD in different fault conditions indicate best performance among used. generation problems are associate...

A smooth coupling is implemented between the grid and doubly fed induction generator-based wind turbines (DFIG-WTs) during voltage imbalance. The nonlinear characteristics of a grid-connected DFIG-WT system may increase stresses on mechanical electrical components turbines. Such difficulties are greatly increased periods Consequently, in this paper, new control scheme proposed to regulate DFIGs...

With the advances in power electronic technology, doubly-fed induction generators (DFIG) have increasingly drawn the interest of the wind turbine industry. To ensure the reliable operation and power quality of wind power systems, the fault-tolerant control for DFIG is studied in this paper. The faulttolerant controller is designed to maintain an acceptable level of performance during bearing fa...

With the increased levels of offshore wind power penetration into power systems, the impact of offshore wind power on stability of power systems require more investigation. In this paper, the effects of a large scale doubly fed induction generator (DFIG) based offshore wind farm (OWF) on power system stability are examined. The OWF is connected to the main onshore grid through a voltage source ...

This study presents the auxiliary damping control with the reactive power loop on the rotor-side converter of doubly-fed induction generator (DFIG)-based wind farms to depress the sub-synchronous resonance oscillations in nearby turbogenerators. These generators are connected to a series capacitive compensation transmission system. First, the damping effect of the reactive power control of the ...

With the prevalence of renewable energy sources such as wind power in system, analyzing fault characteristics systems composed DFIGs is becoming increasingly important. Therefore, this article analyzes, at first theoretically, a doubly fed induction generator (DFIG) during periods. It was found that current DFIG exhibited frequency offset phenomenon, which affected by depth voltage dips and can...