This paper analyzes the impacts of digital filters on the admittance dissipativity of dual-sequence current control for grid-connected voltage-source converters (VSCs). The output admittance model of VSC is first derived in the aß-frame with complex vectors, and then the frequency-domain dissipativity theory is employed to analyze the dynamic impacts of digital filters, revealing that the cascaded use of sequence-decomposition filter (SDF) and low-pass filter (LPF) in the voltage-feedforward (VFF) tends to induce a nondissipative region. Then, an analytical design method for the LPF is developed for mitigating the non-dissipative region. Lastly, the simulation and experimentresults verify the accuracy of the theoretical analysis.
|Title of host publication||2020 IEEE 21st Workshop on Control and Modeling for Power Electronics, COMPEL 2020|
|Publication date||Nov 2020|
|Publication status||Published - Nov 2020|
|Event||21st IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2020 - Aalborg, Denmark|
Duration: 9 Nov 2020 → 12 Nov 2020
|Conference||21st IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2020|
|Period||09/11/2020 → 12/11/2020|
|Series||IEEE Workshop on Control and Modeling for Power Electronics (COMPEL)|
Bibliographical notePublisher Copyright:
© 2020 IEEE.
Copyright 2020 Elsevier B.V., All rights reserved.
- Digital filter
- sequence control
- voltage feed-forward