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. 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.
Original language | American English |
---|---|
Pages (from-to) | 1875-1884 |
Number of pages | 10 |
Journal | IEEE Transactions on Energy Conversion |
Volume | 37 |
Issue number | 3 |
DOIs | |
State | Published - 1 Sep 2022 |
Bibliographical note
Publisher Copyright:© 1986-2012 IEEE.
NREL Publication Number
- NREL/JA-5D00-82947
Keywords
- frequency couplings
- Generic multi-frequency modelling
- perturbation test
- Type 3 WTs