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

This is an open access article published by the IET under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/)
Received 22/08/2018, Accepted 19/09/2018, Published 29/10/2018

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.

Inspec keywords: HVDC power convertors; power generation reliability; machine control; voltage control; power generation control; asynchronous generators; electric current control; wind power plants; synchronisation; voltage-source convertors

Other keywords: DFIG; AC network; network synchronisation modes; islanded system; wind farm; coordinated control strategy; multiterminal VSC–HVDC system; multiterminal system; doubly-fed induction generator; power system reliability; two-terminal system; wind power development; multiterminal voltage-source convertor-high-voltage direct current system; low voltage ride-through technology; LVRT technologies; DC voltage control

Subjects: Asynchronous machines; Reliability; AC-DC power convertors (rectifiers); DC-AC power convertors (invertors); Wind power plants; Control of electric power systems; Voltage control; Current control

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