54 citations · 89 across the 13 of their papers we have counts for
7 papers · 1 filter
Fast-Response Variable Frequency DC-DC Converters Using Switching Cycle Event-Driven Digital Control
Xiaofan Cui, Al-Thaddeus Avestruz
This paper investigates a new method to model and control variable-frequency power converters in a switching-synchronized sampled-state space for cycle-by-cycle digital control. Th…
A Unified Analytical Method to Quantify Three Types of Fast Frequency Response from Inverter-based Resources
Shuan Dong, Xin Fang, Jin Tan +3
With more inverter-based resources (IBRs), our power systems have lower frequency nadirs following N-1 contingencies, and undesired under-frequency load shedding (UFLS) can occur.…
Overcoming High Frequency Limitations of Current-Mode Control Using a Control Conditioning Approach -- Part II: Implementation and Hardware
Xiaofan Cui, Al-Thaddeus Avestruz
This article is the second part of a paper series about interference in extremum (i.e., peak or valley) current-mode control, which applies to both fixed and variable switching fre…
Overcoming High Frequency Limitations of Current-Mode Control Using a Control Conditioning Approach -- Part I: Modeling and Analysis
Xiaofan Cui, Al-Thaddeus Avestruz
Current-mode control is one of the most popular controller strategies for power converters. With the advent of wide bandgap devices including GaN and SiC, higher switching frequenc…
A Note on Low-Pass Filter Conditioning for Current-Mode Control
Xiaofan Cui, Al-Thaddeus Avestruz
The low-pass filter is a classic control conditioning approach for high-frequency current-mode control. However, no existing literature discusses the large-signal stability criteri…
A Note on Comparator-Overdrive-Delay Conditioning for Current-Mode Control
Xiaofan Cui, Guanyu Qian, Al-Thaddeus Avestruz
Comparator-overdrive-delay conditioning is a new control conditioning approach for high-frequency current-mode control. No existing literature rigorously studies the effect of the…
Large-Signal Stability Guarantees for Cycle-by-Cycle Controlled DC-DC Converters
Xiaofan Cui, Al-Thaddeus Avestruz
Stability guarantees are critical for cycle-by-cycle controlled dc-dc converters in consumer electronics and energy storage systems. Traditional stability analysis on cycle-by-cycl…