5 papers
Complementing AC & DC Terminal Stability Analyses of MMC with Inner Loop Impedance
Chongbin Zhao, Qirong Jiang
Learning from two-level voltage source converters, the existing impedance-based stability analyses of modular multilevel converters (MMCs) primarily focus on system modes with fini…
New Perspectives and Systematic Approaches for Analyzing Negative Damping-Induced Sustained Oscillation
Chongbin Zhao, Qirong Jiang
Sustained oscillations (SOs) are commonly observed in systems dominated by converters. Under specific conditions, even though the origin of SOs can be identified through negative d…
Revisiting Nyquist-Like Impedance-Based Criteria for Converter-Based AC Systems
Chongbin Zhao, Qirong Jiang, Yixin Guo
Multiple types of Nyquist-like impedance-based criteria are utilized for the small-signal stability analysis of converter-based AC systems. It is usually considered that the determ…
Understanding Impedance Ratio Criteria for Converter-Based AC Power System
Chongbin Zhao, Qirong Jiang
Nyquist criterion-based impedance ratio criteria (IRCs) have been widely applied for inspecting the risk of small-signal instability among converter-based AC power systems. Aided b…
Impedance-based AC/DC Terminal Modeling and Analysis of MMC-BTB system
Chongbin Zhao, Qirong Jiang
Impedance-based small-signal stability analysis is widely applied in practical engineering with modular multilevel converters (MMCs). However, the deficiencies of existing impedanc…