Closed-Loop Admittance Shaping Using Impedance-Based Stability Criteria In Qft Robust Control Technique
2020 THIRTY-FIFTH ANNUAL IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION (APEC 2020)(2020)
Abstract
This paper introduces a novel QFT voltage controller that allows the input admittance shaping of power converters in frequency domain, allowing to define its magnitude and its phase. The destabilizing effect associated with the constant power load behavior of power converters is mitigated with this input admittance shaping, because it has been shaped using an impedance-based stability criterion, opposing argument criteria. The obtained simulation results, under unfavourable conditions, verify the theoretical development.
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Key words
Admittance-shaping, QFT, CPL, robust control, voltage control, PECs
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