# Cooperative Control Strategy for Low-Voltage Ride-Through of DFIGM Based on an Improved IGBT-Based Active Crowbar

## TL;DR

This paper introduces a new control strategy to improve the performance of wind turbine generators during voltage drops.

## Contribution

A cooperative control strategy combining improved CRTC and an enhanced IGBT-based active crowbar for low-voltage ride-through in DFIGM systems.

## Key findings

- The proposed method optimizes current-tracking coefficients under rotor voltage and current constraints.
- The enhanced active crowbar suppresses negative-sequence current and improves power quality at the PCC.
- Experimental results confirm the feasibility and effectiveness of the new control strategy.

## Abstract

To address the low-voltage fault issue in doubly fed induction generator-motor (DFIGM) systems, this paper proposes a practically implementable cooperative control strategy that integrates an improved current reversely tracking control (CRTC) scheme with an enhanced IGBT-based active crowbar topology. The proposed method optimizes the current-tracking coefficients under rotor voltage and current constraints during LVRT operation. Meanwhile, the enhanced active crowbar provides reactive power support, thereby suppressing negative-sequence current components, mitigating harmonic distortion, and improving the power quality at the point of common coupling (PCC). A 10-MW DFIGM model is developed, and comparative studies are conducted with the conventional inductance emulating control (IEC) and the crowbar structure. The experimental results show the feasibility and effectiveness of the proposed method.