PRBS-based loop gain identification and output impedance shaping in DC microgrid power converters

2020 ◽  
Author(s):  
Aram Khodamoradi ◽  
Guangyuan Liu ◽  
Paolo Mattavelli ◽  
Tuomas Messo ◽  
Hossein Abedini
Keyword(s):  
Power Converters ◽  
Loop Gain ◽  
Output Impedance ◽  
Dc Microgrid

A Study on Loop Gain Measurement Method Using Output Impedance in DC-DC Buck Converter

2018 ◽  
Vol E101.B (9) ◽  
pp. 1940-1948 ◽  
Author(s):  
Nobukazu TSUKIJI ◽  
Yasunori KOBORI ◽  
Haruo KOBAYASHI
Keyword(s):  
Measurement Method ◽  
Buck Converter ◽  
Loop Gain ◽  
Output Impedance ◽  
Gain Measurement

scholarly journals Analysis of an Online Stability Monitoring Approach for DC Microgrid Power Converters

2019 ◽  
Vol 34 (5) ◽  
pp. 4794-4806 ◽  
Author(s):  
Aram Khodamoradi ◽  
Guangyuan Liu ◽  
Paolo Mattavelli ◽  
Tommaso Caldognetto ◽  
Paolo Magnone
Keyword(s):  
Power Converters ◽  
Dc Microgrid ◽  
Stability Monitoring ◽  
Online Stability

scholarly journals Adaptive Stabilization and Dynamic Performance Preservation of Cascaded DC-DC Systems by Incorporating Low Pass Filters

Energies ◽  
2018 ◽  
Vol 11 (2) ◽  
pp. 440 ◽  
Author(s):  
Ahmed Aldhaheri ◽  
Amir Etemadi
Keyword(s):  
Loading Condition ◽  
Dynamic Performance ◽  
Minimum Phase ◽  
Loop Gain ◽  
Adaptive Stabilization ◽  
Output Impedance ◽  
Dc System ◽  
Control Schemes ◽  
Low Pass ◽  
Low Pass Filters

This paper proposes a method to stabilize and enhance the dynamic performance of a cascaded DC-DC system by adaptively reshaping the source output impedance. The method aims to reduce the ratio of the source output impedance to the load input impedance, referred to as the minor loop gain, to eliminate the interaction between the load and the source systems. This interaction can deteriorate the dynamic performance or might lead to instability. Thus, the bus current is used to improve the dynamic performance by reducing the magnitude of the source’s output impedance adaptively according to the loading condition such that the dynamic performance is consistently improved. Utilizing the bus current facilitates the compatibility between the proposed controller and most widely used DC-DC converters controlled in voltage mode, including non-minimum phase converters. In addition to the flexibility the bus current provides to embed the proposed solution with conventional control schemes. Experimental results have validated the effectiveness of the proposed controller along with time-based simulation and theoretical analysis, for minimum and non-minimum phase converters.

scholarly journals Measurement of the Loop Gain Frequency Response of Digitally Controlled Power Converters

2010 ◽  
Vol 57 (8) ◽  
pp. 2785-2796 ◽  
Author(s):  
F Gonzalez-Espin ◽  
E Figueres ◽  
G Garcera ◽  
R Gonzalez-Medina ◽  
M Pascual
Keyword(s):  
Frequency Response ◽  
Power Converters ◽  
Loop Gain ◽  
Digitally Controlled
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