coordinated control strategy for a hybrid wind farm with dfig and pmsg under symmetrical grid faults
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2017
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Abstract
This paper presents a coordinated control strategy for a hybrid wind farm with doubly-fed induction generator (DFIG)- and direct-driven permanent-magnet synchronous generator (PMSG)-based wind turbines under symmetrical grid faults. The proposed low-voltage ride-through (LVRT) strategy is based on a novel current allocation principle and is implemented for individual DFIG- or PMSG-based wind turbines. No communication equipment between different wind power generators is required. By monitoring the local voltages and active power outputs of the corresponding wind generators, the proposed control strategy can control the hybrid wind farm to provide the maximum reactive power to support the grid voltage during a symmetrical grid fault. As a result, the reduction in the active power output from the hybrid wind farm can be decreased, which also helps avoid generator over-speed issues and supply active power support for the power grid. In addition, the reactive current upper limits of DFIG- and PMSG-based sub-wind farms are investigated by considering different active power outputs and different grid voltage dip depths, and the feasible regions of the two types of sub-wind farms for meeting the LVRT requirements are further studied. Finally, the effectiveness of the proposed coordinated LVRT control strategy for the hybrid wind farm is validated by simulation and experimental results.
| Reference Key |
li2017energiescoordinated
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|---|---|
| Authors | ;Jiawei Li;Jun Yao;Xin Zeng;Ruikuo Liu;Depeng Xu;Caisheng Wang |
| Journal | acs combinatorial science |
| Year | 2017 |
| DOI |
10.3390/en10050669
|
| URL | |
| Keywords | Keywords not found |
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