What question did this study set out to answer?

This review aims to evaluate the effectiveness of STATCOMs in enhancing LVRT in DFIG-based wind energy systems.

January 18, 2026Open Access

Improvement of Low Voltage Ride-Through (LVRT) of Doubly Fed Induction Generator (DFIG)-Based Wind Energy Conversion Systems (WECSs) by STATCOMs: A Systematic Literature Review

Key Points

This review aims to evaluate the effectiveness of STATCOMs in enhancing LVRT in DFIG-based wind energy systems.
Conducted a systematic literature review using PRISMA methodology.
Identified and assessed 38 primary research studies from 2009-2014.
Categorized findings into themes such as operational contexts and optimization techniques.
Employed the Critical Appraisal Skills Programme for quality assessment.
Identified trends moving towards advanced control and optimization strategies for LVRT.
Highlighted gaps in research related to cyber-physical security and multi-objective optimization.
Critically evaluated the merits and limitations of current STATCOM implementations.

Abstract

To maintain power system stability and supply quality when integrating doubly fed induction generator (DFIG)-based wind energy conversion systems (DFIG-WECSs), regulators regularly update grid codes specifying low voltage ride-through (LVRT) requirements. This paper presents a systematic literature review (SLR) on the use of STATCOMs to enhance LVRT capability in DFIG-WECSs. Objectives included a structured literature search, bibliographic analysis, thematic synthesis, trend identification, and proposing future research directions. A PRISMA-based methodology guided the review, utilising PRISMA 2020 for Abstracts in the development of the abstract. The final search was conducted on Scopus (31 March 2025). Eligible studies were primary research in English (2009–2014) where STATCOM was central to LVRT enhancement; exclusions included non-English studies, duplicates, reviews, and studies without a STATCOM focus. Quality was assessed using an adapted Critical Appraisal Skills Programme (CASP) tool. No automation or machine learning tools were used. Thirty-eight studies met the criteria and were synthesised under four themes: operational contexts, STATCOM-based schemes, control strategies, and optimisation techniques. Unlike prior reviews, this study critically evaluates merits, limitations, and practical challenges. Trend analysis shows evolution from hardware-based fault survival strategies to advanced optimisation and coordinated control schemes, emphasising holistic grid stability and renewable integration. Identified gaps include cyber-physical security, techno-economic assessments, and multi-objective optimisation. Actionable research directions are proposed. By combining technical evaluation with systematic trend analysis, this review clarifies the state of STATCOM-assisted LVRT strategies and outlines pathways for future innovation in DFIG-WECS integration.

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