3 citations · 7 across the 10 of their papers we have counts for
10 papers
Generalized Feedback Control Modeling Method for Control-Driven Converter Systems
Chen Zhang, Haoxiang Zong, Xu Cai +1
Converters-based systems like wind farms manifest themselves as control-intensive systems, where control-driven stability issues frequently occur, e.g., oscillations. Such issues a…
An Extended Admittance Modeling Method with Synchronization Node for Stability Assessment of Converters-Interlinked System
Haoxiang Zong, Chen Zhang, Marta Molinas
Diverse synchronization dynamics within the grid-following (GFL)/grid-forming (GFM) converters-interlinked system are prone to induce oscillatory instabilities. To quantify their s…
A Multilayer Eigen-Sensitivity Method Using Loop Gain Model for Oscillation Diagnosis of Converter-Based System
Haoxiang Zong, Chen Zhang, Xu Cai +1
Loop gain-based eigen-sensitivity (LGES) is a useful frequency-domain tool for oscillation diagnosis of converter-based system. However, the existing theory is still scant in two a…
A Practical Method for Automated Modeling and Parametric Stability Analysis of VSC with Periodical Steady State
Chen Zhang, Jon Are Suul, Marta Molinas
Linear Time Periodic (LTP) framework-based analysis of Voltage Source Converters (VSCs) is becoming popular, a driven factor is that many of the existing VSC applications inevitabl…
Transient Synchronization Stability Analysis of Wind Farms with MMC-HVDC Integration Under Offshore AC Grid Fault
Yu Zhang, Chen Zhang, Renxin Yang +3
The MMC-HVDC connected offshore wind farms (OWFs) could suffer short circuit fault (SCF), whereas their transient stability is not well analysed. In this paper, the mechanism of th…
Large-Signal Grid-Synchronization Stability Analysis of PLL-based VSCs Using Lyapunov's Direct Method
Yu Zhang, Chen Zhang, Xu Cai
Grid-synchronization stability (GSS) is an emerging stability issue of grid-tied voltage source converters (VSCs), which can be provoked by severe grid voltage sags. Although a qua…
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…
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,…