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A Review on Control Strategy of Wind Turbine With DFIG For Low Voltage Ride Through Capability


Volume 3 Issue 3 June - August 2015
Review Paper
A Review on Control Strategy of Wind Turbine With DFIG For Low Voltage Ride Through Capability
Mitali Gupta*, Ashok Kumar Pandey**
* PG Scholar, Department of Electrical Engineering, Madan Mohan Malaviya University of Technology, Gorakhpur, India.
** Associate Professor, Department of Electrical Engineering, Madan Mohan Malaviya University of Technology, Gorakhpur, India.
Gupta, M., and Pandey, A. K. (2015). A Review on Control Strategy of Wind Turbine With DFIG For Low Voltage Ride Through Capability. i-manager’s Journal on Circuits and Systems, 3(3), 38-44. https://doi.org/10.26634/jcir.3.3.4784
Abstract
Wind energy is a substantial source of renewable energy which has a potentiality of generating energy on a large scale. Developing this new technology becomes more demanding as variable speed wind turbine is highly efficient than the fixed one. DFIG is widely used in variable speed constant frequency wind energy generation system. These type of machines are controlled with the power converters connected to the rotor, where the controlled power is only a portion, approximately equal to the slip of the stator power. DFIG consists of an asynchronous machine, in which the stator is directly connected to the grid and the rotor is connected to the grid via two power electronic converters (back-to-back converter). This characteristic of DFIG has increased the wind energy penetration, but it is more prone to the electrical grid disturbances. This paper provides a review for the protection and control strategy to enhance the LVRT ability of a wind turbine driven DFIG. In this paper, three LVRT methods for protection of DFIG during low voltage events are explained. The three methods are crowbar, DC chopper, series dynamic resistances, and also two hybrid methods named DC chopper with crowbar and DC chopper with series dynamic resistance respectively

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