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.
|Konference||21st IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2020|
|Periode||09/11/2020 → 12/11/2020|
|Navn||IEEE Workshop on Control and Modeling for Power Electronics (COMPEL) |