1,501 research outputs found
A Dynamic Equivalent Method for PMSG Based Wind Farms Under Asymmetrical Faults
In this paper, a three-machine equivalent method applicable to asymmetrical
faults is proposed considering the operating wind speed and fault severity.
Firstly, direct-driven permanent magnet synchronous generator wind turbines
(PMSGs) are clustered based on their different active power response
characteristics considering the wind speed, the fault severity, and the
negative sequence control strategy. Further, single-machine equivalent methods
are proposed for each cluster of PMSGs. In particular, for the PMSGs with ramp
recovery characteristics, a single-machine equivalent model with
multi-segmented slope recovery is proposed, which can more accurately reflect
the characteristics of the wind farm during the fault recovery. Moreover, an
iterative simulation method is proposed to obtain the required clustering
indicators before the actual occurrence of faults. Therefore, the proposed
equivalent method can be used to analyze any anticipated contingency.
Eventually, the effectiveness of the proposed method is verified on a modified
IEEE 39-bus system.Comment: 13 pages, 20 figure
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