-Doubly Fed Induction Generators (DFIGs)find a great deal of application among variable speed wind turbines because of their advantages like operation at variable speed, ability to produce active and reactive power in all the four quadrants, higher efficiency, and extracting maximum electric power at different velocities of wind with the help of speed variation of the rotor and the usage of con...

The doubly-fed induction generator (DFIG) produces the reactive power to maintain its constant voltage operation. Firstly, the principle of the constant voltage control system for double-fed wind turbines is researched, and the influence on DFIG terminal voltage when the wind speed changes and the grid voltage sags is analyzed. Secondly, self-tuning PI control algorithm based on BP neural netwo...

In this work, a robust nonlinear control technique of a doubly fed induction generator (DFIG) intended for wind energy systems has been proposed. The principal idea in this article is to decouple the active and reactive power of the DFIG with high robustness using the backstepping strategy. The principle of this control method is based on the Lyapunov function, in order to guarantee the global ...

<span>There are many types of generators used within wind energy such as doubly fed induction generator (DFIG). Particle swarm optimization (PSO) algorithm is simple, robust and easy to implement. In addition the privilege PSO, autonomous groups particle (AGPSO) has advantages using diverse which result in more randomized directed search. Applying AGPSO tune PI controller control DFIG pro...

With the enlarging scale of doubly-fed induction generators (DFIGs) connected to power systems, it is important analyze influence a short-circuit current system relay protection. Due correct evaluation protection operation characteristics, DFIG needs be calculated accurately. But research on based following assumption: rotor excitation zero after crowbar put, and its dynamic process ignored. Th...

The aim of this paper is to propose different methods of control for a Doubly-Fed Induction Generator (DFIG) used in wind energy conversion systems. This paper presents a comparative study on the performance of three control methods for DFIG wind turbine. The study focuses on the regulation of the active and reactive power exchanged between the generator and the grid by the generator inverter u...

In the new electricity grid code, reactive power generation by wind farms, which must operate similarly to other conventional power plants, is a major concern during both steady-state and fault conditions. This article presents the reactive power capability of a doubly-fed induction generator (DFIG) through the use of performance capability curves. The real and reactive power capability of conv...

This paper discuss the configuration, operation and power flow control strategies of a doubly fed induction generator (DFIG) with back-to-back PWM converter for variable speed wind turbines. The mathematical model of the DFIG is taken as appropriate d-q reference frame and their performances are in terms of stator currents references tracking. In order to control the power flow of the network, ...

Abstract There are various types of distributed generators (DGs) with different grid integration strategies. The transient characteristics the fault currents provided by DGs to those conventional synchronous generators. In this paper, a distribution network multi-type is investigated, including consideration DG low-voltage ride through (LVRT). current two typical DGs, i.e. an inverter-interface...

hydropower plant and especially micro-hydropower plant is an available, reliable and economical energy source. micro-hydropower plant is one of the most environment-friendly technology, use and development of which leads to reduction of energy consumption sporadically and worldwide. along with the growth of these power plants, the issues related to the control of electrical parameters such as l...