The Integrated Reference Region Analysis for Parallel DFIGs’ Interfacing Inductors

Wang, Rui; Yu, Xiaohan; Sun, Qiuye; Li, Dashuang; Gui, Yonghao; Wang, Peng

doi:10.1109/tpel.2024.3361091

Title: The Integrated Reference Region Analysis for Parallel DFIGs’ Interfacing Inductors

Journal Article · 31 January 2024 · IEEE Transactions on Power Electronics

DOI: https://doi.org/10.1109/tpel.2024.3361091 · OSTI ID:2301637

^[1]; Yu, Xiaohan ^[1];

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Northeastern Univ., Shenyang (China)
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Nanyang Technological Univ. (Singapore)

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’ smallsignal 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 paper first proposes the integrated reference region analysis for small wind farm's interfacing inductors to improve the traditional design method. Firstly, a new detailed parallel DFIGs’ smallsignal 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. Secondly, 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 (BMS). Furthermore, it can provide better guidance for parameter selecting and stabilization method researches. Finally, the simulation and experimental results show that the proposed integrated reference region for parallel DFIGs’ interfacing inductors is accurate and instructive.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Electricity (OE); National Natural Science Foundation of China (NSFC); Fundamental Research Funds for the Central Universities; Guangdong Basic and Applied Basic Research Foundation

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 2301637

Journal Information:: IEEE Transactions on Power Electronics, Journal Name: IEEE Transactions on Power Electronics Journal Issue: 9 Vol. 99; ISSN 0885-8993

Publisher:: IEEECopyright Statement

Country of Publication:: United States

Language:: English

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