Abstract
Although the traditional design of doubly-fed induction generators (DFIGs)' interfacing inductors consider the peak ripple of the grid-side converter (GSC)'s output current, it does not consider the inductors' impact on DFIGs' small-signal stability. Located in series between the GSC and the stator, the inappropriate selection of the interfacing inductor can easily result to system instability. Therefore, this article first proposes the integrated reference region analysis for small wind farm's interfacing inductors to improve the traditional design method. First, a new detailed parallel DFIGs' small-signal model that considers output currents' coupling is built in d-q coordinate system with state-space approach. The model focuses on representing the operating states of parallel DFIGs in wind farm. Second, the linearized state-space matrix of parallel DFIGs is decomposed into nominal-value matrix and location matrix. Considering the traditional design requirements, the integrated reference region for interfacing inductor is proposed through spectral radius and bialternate matrix sum. It can provide better guidance for parameter selecting and stabilization method research works. Finally, the simulation and experimental results show that the proposed integrated reference region for parallel DFIGs' interfacing inductors is accurate and instructive.
Original language | English |
---|---|
Pages (from-to) | 7632-7642 |
Number of pages | 11 |
Journal | IEEE Transactions on Power Electronics |
Volume | 39 |
Issue number | 6 |
DOIs | |
State | Published - Jun 1 2024 |
Funding
This work was supported by the National Key Research and Development Program of China under Grant 2018YFA0702200, in part by the China Postdoctoral Science Foundation Funded Project under Grant ZX20210282, in part by the Fundamental Research Funds for the Central Universities in China under Grant N2204014, in part by the Guangdong Basic and Applied Basic Research Foundation under Grant 2021A1515110915, and in part by the National Natural Science Foundation of China under Grant U20A20190 and Grant 52307194.
Funders | Funder number |
---|---|
Fundamental Research Funds for Central Universities of the Central South University | N2204014 |
Fundamental Research Funds for Central Universities of the Central South University | |
China Postdoctoral Science Foundation | ZX20210282 |
China Postdoctoral Science Foundation | |
National Natural Science Foundation of China | 52307194, U20A20190 |
National Natural Science Foundation of China | |
National Key Research and Development Program of China | 2018YFA0702200 |
National Key Research and Development Program of China | |
Basic and Applied Basic Research Foundation of Guangdong Province | 2021A1515110915 |
Basic and Applied Basic Research Foundation of Guangdong Province |
Keywords
- Integrated reference region analysis
- interfacing inductor
- parallel doubly-fed induction generators (DFIGs)
- small-signal modeling
- small-signal stability