The global electrical energy consumption is rising and there is steady increase of the demand on power generation. In addition to conventional power generation units a large number of renewable energy units are being integrated into the power system. The Wind Energy Conversion system (WECS) is the most cost competitive of all the environmentally clean and safe renewable energy sources in world....

This paper describes optimal reactive power control of a doubly fed induction generator (DFIG), which is widely used in a distributed generating plant. Although its structure is similar to that of induction motors, its reactive power control is more complicated. In this paper, steady-state power transfer equations are derived and developed for a doubly fed structure of the induction generators....

The increase in penetration of wind farms operating with doubly fed induction generators (DFIG) results stability issues such as voltage dips and high short circuit currents the case faults. To overcome these issues, to achieve reliable sustainable power from an uncertain source, fault current limiters (FCL) are incorporated. This work focuses on limiting level fulfilling reactive compensation ...

In this paper, a control system for the operation of a doubly fed induction generator (DFIG), feeding an unbalanced three-phase load is presented. The load unbalance is compensated using the front-end converter. The control system is based on positive and negative sequence components of current. MATLAB Simulation results obtained from a DFIG system and are presented and discussed in this paper....

The grid codes now require doubly fed induction generator (DFIG) wind turbines having the “low voltage ride-through (LVRT)” capability. However, a traditional DFIG with a partially rated back-to-back converter has inherent difficulties to ride through the grid faults, especially for the unbalanced grid faults. Modifications to the traditional DFIG configuration for ride-through have become nece...

Wind energy today, has attracted widespread interest from among a variety of sources of renewable energy in the world. Owing to the increasing demand for production of electrical energy for electricity networks by using wind power, it is essential that wind power plants are actively incorporated in the network’s performance using an appropriate control system. In general, these wind power p...

Abstract The main problem of wind turbines is associated with induction generators in their power supply during short circuits the grid. In this research, a new method presented for uninterrupted operation turbine equipped an generator fed on both sides feeding network errors. Wind farms doubly-fed (DFIG) require two abilities to allow system operators increase proficiency. These capabilities i...

This paper presents an efficient design tool for the estimation of the transient electromagnetic peak torque and transient rotor over-voltages of wind turbines (WT) doubly-fed induction generators (DFIG) during severe fault conditions on the grid side. This versatile and robust tool is well adapted to the implementation in a DFIG drives CAD environment using iterative optimization procedures. I...

In order to utilize Doubly Fed Induction Generators (DFIGs) as primary power source in an isolated system, they should be able to regulate the voltage and frequency of the system as well as ride-through faults. This paper proposes a new control strategy for a DFIG operating in an isolated power system, accomplished by a Dynamic Voltage Restorer (DVR) and a Supercapacitor Energy Storage System (...

This article presents a novel study of stator electrical faults detection using the wide-band spectral signatures in controller signals doubly fed induction generators (DFIGs). The possible content are first defined with set analytical equations order to characterize and their correlation operating conditions including faults. A DFIG harmonic model laboratory test-rig used validate derived equa...