The national grid codes of main wind power markets in the world are introduced and more attentions are paid for the different kinds of fault ride through capabilities of wind turbines, such as low voltage ride through (LVRT), high voltage ride through (HVRT) and frequency ride through (FRT). After that, the interactions between the electricity network and three kinds of main wind turbines which equipped with real GFRT engineering devices are analyzed and engineering implementation scheme of three kinds of main LVRT capabilities of wind turbines is summarized. Finally, based on years of working experience and the above researches, 12 main technical factors which are very important to the LVRT characteristics of wind turbines are summarized.