A vector control of a grid-connected 3L-NPC-VSC with DFIG drives

• Main Authors: Srirattanawichaiku W., Kumsuwan Y., Premrudeepreechacharn S., Wu B.
• Format: Conference or Workshop Item
• Language: English
• Published: 2014
• Online Access: http://www.scopus.com/inward/record.url?eid=2-s2.0-77954932818&partnerID=40&md5=d4e9c0d0e516b0f8b9f83bc33095d0d2; http://cmuir.cmu.ac.th/handle/6653943832/1495
• Institution: Chiang Mai University

This paper presents a vector control of grid-connected three-level neutral point clamped voltage source converter (3L-NPC-VSC) connecting doubly-fed induction generator (DFIG) drives for variable-speed wind power generation. The control algorithm of the grid-connected 3L-NPC-VSC applies the concepts of the decoupled vector control method, which provides independent control active and reactive power flow and maintain the dc-link voltage constant. The simulation results are shown dynamic and steady-state performance of the grid-connected 3L-NPC-VSC in mode sub-synchronous and super-synchronous speed at low switching frequency that compared with a conventional two-level voltage source converter (2L-VSC). The control strategy is verified by the simulation results with a good sinusoidal current, a low harmonic component and a fast dynamic response.