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.
The paper presents properties and control methods of grid-connected doubly-fed induction generator (DFIG). The paper is focused on unbalanced grid operation, because presently it is the biggest challenge for this type of generator. There are discussed three most popular methods - direct power control, direct torque control, and vector control with proportional-resonant PR controllers of rotor current...
The paper presents a new type of rotor position observer using cross and dot products of the estimated and measured rotor current vector. A novel synchronization error function contains modified function atan2 and the vector products. The modification of error function is aimed at making the function monotonic, what provides faster response of the observer. Two rotor speed and position observers with...
The paper presents the method of stator voltage control of the doubly fed induction machine based generation system feeding nonlinear load. The method uses load current signal as feedforward structure without the use of selective extraction of harmonics components. There are compared results with measured and estimated current of nonlinear and unbalanced load. The dynamic states of step loading and...
Several methods can be used in the current control loop of a doubly-fed induction generator systems. The PI controllers in the rotating frame system oriented to the stator voltage (VOC) or flux (FOC) are the most popular control methods. In this case, controller response in each axis also gives an answer to the second axis. Therefore, a transient state of the system response is longer and may have...
The paper describes a variable speed, doubly fed induction generator based, standalone power system supplying unbalanced and nonlinear load. A sensorless control method of the fundamental 50Hz harmonic uses a PLL for synchronization of the measured stator voltage vector with the reference one. Additional part of control includes feedbacks from the components of voltage asymmetry and harmonics, extracted...
A paper describes cooperation of the standalone doubly fed induction generator with an energy storage or auxiliary power unit coupled with the DC bus of the main back-to-back power electronics converter. The control method and the energy management of the energy storage coupled through a bidirectional DC/DC converter with a DC-link of the main back-to-back converter is proposed. The control method...
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.