Control of a grid-connected direct-drive wind energy conversion system
This paper investigates the current control for a grid-connected direct-drive wind energy conversion system (DDWECS) with a permanent magnet synchronous generator (PMSG), which utilizes a back-to-back pulse width modulation (PWM) converter. For the machine-side, the controller adopts a current vector control method based on the rotating reference frame (RRF) and the maximum power extraction (MPE) is realised through the tip speed ratio (TSR) method. For the grid-side, a novel controller is proposed for the first time to be successfully used for the DDWECS, which combining a proportional complex integral (PCI) current inner loop based on stationary reference frame (SRF) for regulating the grid-side current with a dc voltage outer loop for stabilizing the dc bus voltage and compare with the proportional resonant (PR) controller. A system simulation model is established by using the Matlab/Simulink to simulate the performance of the DDWECS and a prototype system has been build and tested to verify the validity of the developed control methods for both machine-side and grid-side and the excellent performance of the DDWECS.
Year of publication: |
2014
|
---|---|
Authors: | Yan, Jianhu ; Lin, Heyun ; Feng, Yi ; Zhu, Z.Q. |
Published in: |
Renewable Energy. - Elsevier, ISSN 0960-1481. - Vol. 66.2014, C, p. 371-380
|
Publisher: |
Elsevier |
Subject: | Current vector control | Grid-connected direct-drive wind energy conversion system | Proportional complex integral control | Rotating reference frame | Stationary reference frame |
Saved in:
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