Open AccessReview on FRT solutions for improving transient stability in DFIG‐WTs
Author(s) -
Rini Ann Jerin Amalorpavaraj,
Kaliannan Palanisamy,
Subramaniam Umashankar,
Shawky El Moursi Mohammed
Publication year - 2018
Publication title -
iet renewable power generation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.005
H-Index - 76
ISSN - 1752-1424
DOI - 10.1049/iet-rpg.2018.5249
Subject(s) - retrofitting , doubly fed electric machine , transient (computer programming) , grid code , rotor (electric) , grid , ac power , control theory (sociology) , fault (geology) , low voltage ride through , computer science , wind power , flexible ac transmission system , engineering , control (management) , voltage , control engineering , power (physics) , electric power system , electrical engineering , physics , geometry , mathematics , structural engineering , quantum mechanics , power flow , seismology , geology , artificial intelligence , operating system
Fault‐ride‐through (FRT) is an imperative capability in wind turbines (WTs) to ensure grid security and transient stability. However, doubly fed induction generator‐based WTs (DFIG‐WTs) are susceptible to disturbances in grid voltage, and therefore require supplementary protection to ensure nominal operation. The recent amendments in grid code requirements to ensure FRT capability has compelled this study of various FRT solutions. Therefore, for improving FRT capability in pre‐installed WTs, re‐configuration using external retrofit‐based solutions is more suitable and generally adapted. The most relevant external solutions based on retrofitting available are classified as (a) protection circuit and storage‐based methods and (b) flexible alternating current transmission system‐based reactive power injection methods. However, for new DFIG‐WT installations, internal control modification of rotor‐side converter (RSC) and grid‐side converter (GSC) controls are generally preferred. The solutions based on modifications in RSC and GSC control of DFIG‐WT are classified as (a) traditional control techniques and (b) advanced control techniques. This study ensures to curate and compare the FRT solutions available based on external retrofitting‐based solutions and internal control modifications. Also, the future trends in FRT augmentation of DFIG‐WTs are discussed in this study.