Abstract
Wind energy is a promising and efficient renewable energy source for electrical energy production. Globally, there has been a significant increase in the development of wind energy conversion systems (WECS). The world is interested in grid codes applying for facing various problems because of large capacity WECS integration with the grid, including the stability and reliability of electrical grid and power quality. Low voltage ride through (LVRT) capability is an important requirement of grid codes. LVRT means that the wind turbine is still connected to the grid during grid voltage sags. This is essential for ensuring that no generated power by wind turbines is lost due to grid disturbances. To deal with these issues simultaneously, this paper presents a comprehensive review of LVRT methods for the most common wind generators; squirrel cage induction generator (SCIG), doubly fed induction generators (DFIG), and permanent magnetic synchronous generator (PMSG). Moreover, the overall view of optimization techniques that are used to enhance LVRT capability for WECSs and the configurations of WECS are investigated. A comprehensive and a useful summary for the recent work in literature regarding LVRT methods for these three wind generators with comparisons and discussion are introduced. To achieve this aim, more than 200 articles are organised and only 135 papers are presented in this review.
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