20 citations · 39 across the 7 of their papers we have counts for
7 papers
Impedance Network of Interconnected Power Electronics Systems: Impedance Operator and Stability Criterion
Chen Zhang, Marta Molinas, Atle Rygg +1
Impedance is an intuitive and efficient way for dynamic representation of power electronics devices. One of the evident strengths, when compared to other small-signal methods, is t…
Understanding the Nonlinear Behavior and Frequency Stability of a Grid-synchronized VSC Under Grid Voltage Dips
Chen Zhang, Marta Molinas, Xu Cai +1
Transients of a grid-synchronized voltage source converter (VSC) are closely related to over- currents and voltages occurred under large disturbances (e.g. a grid fault). Previous…
A simple method for shifting local dq impedance models to a global reference frame for stability analysis
Atle Rygg, Marta Molinas, Eneko Unamuno +2
Impedance-based stability analysis in the dq-domain is a widely applied method for power electronic dominated systems. An inconvenient property with this method is that impedance m…
Accurate and reduced SISO Sequence Impedance Models of Grid-tied Voltage Source Converter for Small Signal Stability Analysis
Chen Zhang, Xu Cai, Atle Rygg +1
Impedance models are widely used in assessing small signal stability of grid-tied voltage source converter (VSC) systems. Recent research has proven that impedance models of grid-t…
Augmented Sequence Impedance Networks of Grid-tied Voltage Source Converter for Stability Analysis
Chen Zhang, Xu Cai, Atle Rygg +1
Impedance-based stability analysis is appealing in the case of Single-Input Single-Output (SISO) systems. However, in the case of grid-tied voltage source converter (VSC) systems,…
Coupled and decoupled impedance models compared in power electronics systems
Atle Rygg, Marta Molinas, Chen Zhang +1
This paper provides a comparative analysis of impedance models for power electronic converters and systems for the purpose of stability investigations. Such models can be divided i…