Coordinated Fault Ride Through Method for PMSG-Based Wind Turbine Using SFCL and Modified Control Strategy

• Published in: IEEE transactions on applied superconductivity Vol. 31; no. 8; pp. 1 - 5
• Main Authors: Xie, Qi, Zheng, Zixuan, Huang, Chunjun, Dai, Tingting
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.11.2021; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Circuit faults; Converters; coordinated control; Current limiters; Faults; FRT; Generators; Modules; Permanent magnets; PMSG; Power control; power decreasing control; Reactive power; Resistance; Rotors; SFCL; Transient analysis; Voltage control; Voltage sags; Wind turbines
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2021.3103730

Motivated by the issues that the cost of superconducting fault current limiter (SFCL) based fault ride through (FRT) scheme for permanent magnet synchronous generator (PMSG) is high, and it cannot tackle different voltage sags due to the constant resistance of SFCL, this paper presents a coordinated method for enhancing the FRT capability of PMSG based wind turbine (WT) under various grid faults. In the proposed method, the unbalanced power accumulated on dc-link during grid fault is dissipated by coordinating SFCL and decreasing power control (DPC) of machine side converter (MSC). Besides, a transient reactive power control (TRPC) module is implemented on the grid side converter (GSC) to meet the reactive requirement of grid codes. The coordinating mode of three modules assists the WT to tackle the severe grid faults while only the DPC is activated to deal with the mild grid faults. Several cases studies are conducted in PSCAD/EMTDC to verify the feasibility and superiority of the proposed method.