Work

Enhanced Control Strategies for Improving Low Fault Ride-Through Capability of Grid-Connected Doubly Fed Induction Wind Turbines

Year: 2025

Type: article

Abstract: The DFIG faces challenges in providing fast and accurate support during grid voltage fluctuations. Severe voltage dips can trigger peak currents, which may damage the converter equipment and even lead to the disconnection of turbines from the grid. This paper deeply analyzes the transient characteristics of stator flux dynamics under voltage dips and identifies the transient component of the rotor-induced EMF as the primary cause of rotor overcurrent. To address this issue, an improved control strategy is proposed that utilizes stator current as a rotor voltage compensation method to effectively suppress rotor overcurrent. Furthermore, an LVRT hardware protection scheme, combining both Crowbar and Chopper circuits, is designed to handle converter capacity limitations during deep voltage dips. The proposed control strategy and protection scheme are validated through simulations conducted on the Matlab/Simulink platform, demonstrating their effectiveness and accuracy.

Source: Energies

DOI: 10.3390/en18040767

Authors: Yuanjia Yang, Man Gao, Zhenxiong Zhou

Institution: Beihua University

Language: English

Topic: Wind Turbine Control Systems

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Affordable and clean energy, Industry, innovation and infrastructure

Open Access status: gold

Estimated APC paid: $3,137