Review of low voltage ride-through technology of doubly-fed induction generator

Abstract

In recent years, with the increasing of wind power development, the demand for low voltage ride-through (LVRT) technology was proposed to ensure the safe and reliable operation of the power system. The key issue of LVRT strategy for doubly-fed induction generator (DFIG) varies according to the network synchronisation modes. Firstly, the existed LVRT technologies when DFIG is connected to AC network are surveyed. Then relevant literatures about LVRT are summarised and analysed in regard to power surplus of two-terminal system and DC voltage control of multi-terminal system, respectively, when the wind farm is integrated with VSC-high-voltage direct current (HVDC). In the end, the coordinated control strategy of multi-terminal VSC–HVDC system and LVRT technology for islanded system are prospected in this study.

Keywords

• asynchronous generators
• wind power plants
• HVDC power convertors
• power generation control
• voltage control
• synchronisation
• electric current control
• voltage-source convertors
• power generation reliability
• machine control
• coordinated control strategy
• multiterminal VSC–HVDC system
• islanded system
• low voltage ride-through technology
• doubly-fed induction generator
• wind power development
• DFIG
• network synchronisation modes
• AC network
• two-terminal system
• DC voltage control
• multiterminal system
• wind farm
• power system reliability
• LVRT technologies
• multiterminal voltage-source convertor-high-voltage direct current system