On-line Measurement of Inward and Outward Impedances for Stability Assessment
作者： Igor Cvetkovic , Zeng Liu , Dushan Boroyevich , Rolando Burgos
DOI: 10.1109/ESTS.2019.8847804
关键词: Control theory 、 Monitoring methods 、 Electrical impedance 、 Output impedance 、 Transfer function 、 Nyquist plot 、 Stability assessment 、 Perturbation (astronomy) 、 Physics 、 Equivalent system
摘要: The paper presents an alternative on-line stability monitoring method, where by performing internal perturbation, converter itself can measure source output impedance and load input admittance simultaneously. Using these measurements, combining them with converter’s un-terminated transfer functions, equivalent system (and admittance) be calculated out, offering a great opportunity to observe at both, side of the converter. Additionally, using all terminal impedances, Nyquist plots for both sides also plotted better insight into margins.
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