An Overview of the Low Voltage Ride Through (LVRT) of Doubly-Fed Induction Generator

摘要

In recent years the proportion of wind-powered electricity in power supply grows up quickly. When the power grid failure causes the voltage drop, the wind turbine generation will bring system transient instability if they split. This may even result in partial or overall paralysis of the system, so people began to focus on the fan interconnection and correspondingly put forward the requirement of low voltage ride through (LVRT). This paper treats doubly-fed induction generator as the main unit, and it particularly illustrates the DFIG wind power system LVRT technology, its latest developments and the main development way in the future.