Research Article
Low voltage ride-through control of MMC valve in large-scale wind power systems based on transformer load forecasting
@ARTICLE{10.4108/ew.14631, author={Yuhui Chen and Jiandong Tang and Xinxin Chen and Yu Wan}, title={Low voltage ride-through control of MMC valve in large-scale wind power systems based on transformer load forecasting}, journal={EAI Endorsed Transactions on Energy Web}, volume={13}, number={1}, publisher={EAI}, journal_a={EW}, year={2026}, month={10}, keywords={Modular Multilevel Converter, Negative-Sequence Current Control, Low Voltage Ride-Through, Circulating Current Suppression, Self-Attention Mechanism, Transformer-based Load Forecasting}, doi={10.4108/ew.14631} }- Yuhui Chen
Jiandong Tang
Xinxin Chen
Yu Wan
Year: 2026
Low voltage ride-through control of MMC valve in large-scale wind power systems based on transformer load forecasting
EW
EAI
DOI: 10.4108/ew.14631
Abstract
INTRODUCTION: This paper investigates a fault ride-through control strategy for modular multilevel converter (MMC) based converter valves under low-voltage ride-through (LVRT) requirements in large-scale wind power transmission. OBJECTIVES: To develop an enhanced LVRT control integrating hierarchical voltage balancing, dual-loop current control, and Transformer-based feedforward for improved dynamic response. METHODS: Positive-/negative-sequence dual current inner-loop controller designed. Hierarchical submodule capacitor voltage balancing proposed. Transformer load forecasting using self-attention dynamically corrects active power reference. RESULTS: Typhoon HIL validation under single-phase ground fault shows: negative-sequence current suppressed >90%; submodule capacitor voltage deviation decreases from 10% to 4.5%; circulating current effectively eliminated. CONCLUSION: The strategy meets LVRT requirements in large-scale wind power transmission applications.
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