Simultaneous Identification of Multiple Control Loops in DC Microgrid Power Converters

2020 ◽  
Vol 67 (12) ◽  
pp. 10641-10651 ◽  
Author(s):  
Aram Khodamoradi ◽  
Guangyuan Liu ◽  
Paolo Mattavelli ◽  
Tuomas Messo
Keyword(s):  
Power Converters ◽  
Multiple Control ◽  
Dc Microgrid ◽  
Control Loops ◽  
Simultaneous Identification

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 Impedance Decomposition for Design-Oriented Analysis of Grid-Forming Voltage-Source Converters

2020 ◽  
Author(s):  
Yicheng Liao ◽  
xiongfei wang
Keyword(s):  
Stability Analysis ◽  
Controller Design ◽  
System Stability ◽  
Voltage Source ◽  
Voltage Source Converters ◽  
Multiple Control ◽  
Decomposition Approach ◽  
Control Loops ◽  
Nyquist Stability ◽  
Impedance Decomposition

<p>Grid-forming voltage-source converters (VSCs) tend to suffer from sideband oscillations in stiff grids. Conventional state-space eigenvalue analysis or impedance-based stability analysis based on generalized Nyquist stability criterion can only analyze how specific control parameters affect the overall system stability, which ends up with less insight into a controller design-oriented analysis. To tackle this challenge, this article starts with the impedance modeling and stability analysis of grid-forming VSCs in stiff grids. Then, an impedance decomposition approach to characterizing the impacts of multiple control loops is proposed, which benefits in a controller design-oriented analysis for stability enhancement. Finally, simulation and experimental results are provided to validate the approach.</p>

scholarly journals Impedance Decomposition for Design-Oriented Analysis of Grid-Forming Voltage-Source Converters

2020 ◽  
Author(s):  
Yicheng Liao ◽  
xiongfei wang
Keyword(s):  
Stability Analysis ◽  
Controller Design ◽  
System Stability ◽  
Voltage Source ◽  
Voltage Source Converters ◽  
Multiple Control ◽  
Decomposition Approach ◽  
Control Loops ◽  
Nyquist Stability ◽  
Impedance Decomposition

<p>Grid-forming voltage-source converters (VSCs) tend to suffer from sideband oscillations in stiff grids. Conventional state-space eigenvalue analysis or impedance-based stability analysis based on generalized Nyquist stability criterion can only analyze how specific control parameters affect the overall system stability, which ends up with less insight into a controller design-oriented analysis. To tackle this challenge, this article starts with the impedance modeling and stability analysis of grid-forming VSCs in stiff grids. Then, an impedance decomposition approach to characterizing the impacts of multiple control loops is proposed, which benefits in a controller design-oriented analysis for stability enhancement. Finally, simulation and experimental results are provided to validate the approach.</p>

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