نتایج جستجو برای: dfig

تعداد نتایج: 1295  

2012
Ahmed G. Abo-Khalil

This paper presents a new synchronization algorithm for grid connection of a doubly fed induction generator (DFIG) in a variable speed wind generation system. Stator flux-oriented vector control for backto-back PWM converters in the DFIG rotor circuit is used for synchronization process. By controlling the rotor d-axis current, the magnitude of the stator EMF is adjusted to be equal to the grid...

As one of the most promising Distributed Generation (DG) sources, wind power technology has been widely developed in recent years. Doubly fed induction generator (DFIG) is currently employed as one of the most common topologies for wind turbine generators (WTGs). This generator operates as a synchronous/asynchronous hybrid generators. Therefore, it is necessary to power engineers find understan...

2016
Shuying Yang Tianbao Zhou Dengyue Sun Zhen Xie Xing Zhang

This paper presents an active crowbar, constructed with silicon controlled rectifiers (SCRs), for doubly fed induction generator (DFIG)-based wind turbines to fulfill low-voltage ride-through (LVRT) requirements demanded by grid codes. By this design, not only the active deactivation of the costly IGBT crowbar, replacing the passive crowbar for this ability, can be achieved with the more cost-e...

2014
A. D. Thirumoorthy

Wind power generation is increasing rapidly in India and wind integration with the grid is considered as a promising source of energy, Double Fed Induction Generator (DFIG) being the most commonly used wind turbine generator, when integrated with the grid show challenges during grid faults. This paper focuses on the challenges faced by DFIG during the occurrence of voltage sags and the Low Volt...

2012
Dr John Fletcher Jin Yang

This chapter introduces the operation and control of a Doubly-fed Induction Generator (DFIG) system. The DFIG is currently the system of choice for multi-MW wind turbines. The aerodynamic system must be capable of operating over a wide wind speed range in order to achieve optimum aerodynamic efficiency by tracking the optimum tip-speed ratio. Therefore, the generator’s rotor must be able to ope...

2016
Spyros I. Gkavanoudis Charis S. Demoulias

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 (...

2009
John Schönberger

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...

2017
Yipeng Song

As the wind power generation develops, the Doubly Fed Induction Generator (DFIG) based wind power system may suffer Sub Synchronous Resonance (SSR) and High Frequency Resonance (HFR) in the series and parallel compensated weak network. The principle and frequency of HFR have been discussed using the Bode diagram as an analysis tool. However, the HFR can be categorized into two different types: ...

ژورنال: :روش های هوشمند در صنعت برق 2013
مجید طاووسی بهادر فانی احسان ادیب

ژنراتور القایی تغذیه دوبل مزایای متعددی نسبت به ژنراتورهای دیگر تولیدکننده‍ی برق بادی دارد. dfig نسبت به کمبود ولتاژ پایانه‍ی ژنراتور بسیار حساس است. زیرا افت ولتاژهای عمیق باعث القای ولتاژهای ضد محرکه‍ی بزرگ در رتور می شود که این امر منجر به عبور جریانهای گذرای شدید از رتور و افزایش ولتاژ واسط dc در مبدل الکترونیک قدرت و در نتیجه آسیب دیدن مبدل الکترونیک قدرت می گردد. این مقاله در ابتدا به مدل...

ژنراتور القایی تغذیه دوبل مزایای متعددی نسبت به ژنراتورهای دیگر تولیدکننده‍ی برق بادی دارد. DFIG نسبت به کمبود ولتاژ پایانه‍ی ژنراتور بسیار حساس است. زیرا افت ولتاژهای عمیق باعث القای ولتاژهای ضد محرکه‍ی بزرگ در رتور می‌شود که این امر منجر به عبور جریانهای گذرای شدید از رتور و افزایش ولتاژ واسط dc در مبدل الکترونیک قدرت و در نتیجه آسیب دیدن مبدل الکترونیک قدرت می‌گردد. این مقاله در ابتدا به مدل...

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