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DOE OSTI · 1868504

Extension of the Generic Multi-Frequency Modelling Method for Type 3 Wind Turbines

Nouri, Behnam·Kocewiak, Łukasz Hubert·Shah, Shahil·Koralewicz, Przemyslaw·Gevorgian, Vahan·Srensen, Poul
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Abstract

Reflecting potential non-linearities of converter-based systems, especially frequency and sequence couplings, is an ongoing challenge for linearized multi-frequency models. Besides, design details are required to develop such models, which either are the intellectual property of manufacturers or require experimental tests. The generic multi-frequency modelling method has been proposed to fill this gap; however, it is only developed for converter-connected systems, e.g., Type 4 Wind Turbines (WT). This paper proposes to extend the application of the generic multi-frequency modelling method for Type 3 WTs. In this way, a theory for patterns of the couplings in Type 3 WTs is proposed. Accordingly, a group of emissions and couplings are Rotor-Speed-Dependent (RSD). The RSD emissions and couplings are particular characteristics of Type 3 WTs, which should be addressed in the generic multi-frequency models. Additionally, the proposed theory is verified by unique-worldwide experimental perturbation tests on a 2 MVA Type 3 WT using a 7 MVA grid emulator. Accordingly, a limited number of RSD couplings and emissions are observed in the test results, mainly in low frequencies (below 1 kHz). Therefore, addressing the RSD couplings is practical and important to extend the generic multi-frequency modelling for Type 3 WTs.

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Nouri, Behnam, Kocewiak, Łukasz Hubert, Shah, Shahil, Koralewicz, Przemyslaw, Gevorgian, Vahan, Srensen, Poul. 2022-04-11. Extension of the Generic Multi-Frequency Modelling Method for Type 3 Wind Turbines. https://doi.org/10.1109/tec.2022.3166470

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