The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
With the development of modern wind energy generation, higher requirements to the grid in case of a failure were raised. In order to faciliate the recovery of power, while voltage dips in a certain range, protecting the rotor side converter and providing reactive power to the grid are both needed according to the requirements. This paper takes DFIG for example, in order to protect the rotor side converter,...
This paper proposes a combined protection and control strategy to enhance the low voltage ride-through (LVRT) capability of a wind turbine driven doubly fed induction generator (DFIG). Since the conventional crowbar is activated to protect the rotor side converter during the fault interval, the DFIG will operate in the fix speed mode and absorb large amount of reactive power from the grid. This problem...
This paper deals with the modelling and effect of Doubly Fed Induction Generator (DFIG) for wind turbines on transient stability analysis when connected to grid system. A reduced order model for the DFIG has been used. A controller for speed, voltage and power factor has also been implemented. The DFIG model and the controller are presented as Differential Algebraic Equations (DAE). A 7th order model...
This paper focused on modeling and controlling of a doubly-fed induction generator (DFIG). The presented model is developed based on the basic flux linkage, voltage and torque equations. In order to control the DFIG's active power, a suitable method based on PSO algorithm has been proposed. The simulation results show that the presented method is a useful way to improve the output power of DFIG.
Doubly Fed Induction Generator (DFIG) based wind farms are one of the major contributors to wind power generation. The capability of generating active power over an extended range of speed has made it attractive to maximize the power extraction from wind. This has also facilitated reduction of mechanical stress in the turbine. However recently it has been reported that achieving the maximum power...
Many wind turbine generators (WTGs) are installed in remote, rural areas, where the power grids are usually weak, characterized by unbalanced voltage conditions. If the voltage unbalance is not taken into account in the control system, it will cause poor power quality and poor operating performance of the WTG systems. This paper proposes a novel control scheme to improve the operating performance...
The vector control technique is applied in doubly fed induction generator (DFIG) according to the characteristic of AC-excited variable speed constant frequency (VSCF) wind power generation, a comprehensive control strategy is presented based on grid voltage orientation, which gets the same performances as stator flux orientation, but the stator flux observer can be omitted to simplify the control...
Indirect and direct vector control strategies can be applied to a stand alone doubly fed induction generator (DFIG) for wind energy applications. The control algorithm allows generating constant frequency and voltage with variable mechanical speed. The maximum power tracking can only be realised by controlling the load power. In this study the load was modelled as a controlled rectifier supplying...
Traditional wind power generation is directly or step-down cut in, and the current impact is extremely high. In this paper, according to the characteristic of AC-excited variable speed constant frequency (VSCF) wind power generation, a vector control technique is applied in doubly fed induction generator (DFIG), and an idle load cutting-in control strategy is presented based on grid voltage orientation...
The paper considers a control solution for integration of large offshore DFIG-based wind farms with a common collection bus controlled by a STATCOM into the main onshore grid using line-commutated HVDC connection. The main focus of the paper is a mathematically grounded study of the power system interactions that resulted in a plant model appropriate for a formal control design. A design procedure...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.