Voltage Recovery Control Techniques o f Grid Connected Variable Speed Wind Turbines a t a Short Circuit
Rezq Mohammed Moustafa1, Ahmed El Biomy Mansour2, Abd El Ghany Mohammed3 

1Rezq Mohammed Moustafa, New Urban Communities Authority, (NUCA), Ministry Of population, Cairo, Egypt.
2Ahmed El Biomy Mansour, Assistant Professor, Electrical Engineering, Department, Al Azhar University, Cairo, Egypt.
3Abd El Ghany Mohammed, Professor, Electrical Engineering, Department, Helwan University, Cairo, Egypt.

Manuscript received on 10 March 2019 | Revised Manuscript received on 17 March 2019 | Manuscript published on 30 July 2019 | PP: 868-873 | Volume-8 Issue-2, July 2019 | Retrieval Number: A9248058119/19©BEIESP | DOI: 10.35940/ijrte.A9248.078219
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: The documented investigation in this paper examines main power quality for wind turbines and its connection with the public grid. This main goal has been to investigate most popular type of wind turbines which are grid connected using doubly-fed induction generators (DFIG) at normal operation, as well as voltage control of these wind turbines after clearing a lines short circuit in the utility grid. This paper introduces the configuration of main portions of grid connected turbines, which have an importance in the wind power plants operation. It also proposes a new compact modeling of these wind turbines, which has a feature that the expressions of most plant portions are free of any complex or details that described in other past models. Most of last models are spotted on the normal operation of single wind turbines, without consideration of gird interaction faults. The proposed control techniques are new combined and concentrated on the voltage recovery, which plays very important role in the power quality and stability of wind turbines plants which are connected with the grid. Net simulation results show that the combination of pitch control and dynamic slip control could to have power system stability efficiently, and restore the voltage to its normal condition. A simulation of wind turbine using pitch control and dynamic slip control are developed by the simulation program is called power system computer aiding design (PSCAD) and carried out the stability investigations respecting to short circuit in external power lines system. After clearing of the fault, the recovery of voltage at the terminals of wind turbine should to rebuild, then the wind power turbine should going to its normal case. Control of the pitch angle or generator slip can adjusting the aerodynamic torque and the electromagnetic torque at the turbine which can be help to recovery the voltage at the terminals of wind turbine. The results of case study simulation are proved that pitch and dynamic slip controls are methods to improve the recovery of voltage effectively and going to the system stability quickly, especially the combined controls of dynamic slip and pitch angel together.
Index Terms: Wind Turbines, Wound Rotor, Doubly Feed Induction Generator, Pitch, and Dynamic Slip.

Scope of the Article: Quality Control