Browsing NTNU Open by Author "Zong, Haoxiang"
Now showing items 1-7 of 7
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Accurate aggregated modelling of wind farm systems in modified sequence domain for stability analysis
Zong, Haoxiang; Lyu, Jing; Cai, Xu; Zhang, Chen; Molinas Cabrera, Maria Marta; Rao, Fangquan (Peer reviewed; Journal article, 2019)With the wind power penetration rate continuously rising, a suitable wind farm model considering both accuracy and simplicity is required for power system stability analysis. To accomplish this goal, an accurate aggregated ... -
Analysis of Power Electronics-Dominated Hybrid AC/DC Grid for Data-Driven Oscillation Diagnosis
Zong, Haoxiang; Zhang, Chen; Cai, Xu; Molinas Cabrera, Maria Marta (Chapter, 2022)The high penetration of renewables has imposed great oscillation risks on power grids, especially for the power electronics-dominated hybrid AC/DC grid. Measurement data-driven diagnosis of oscillations regarding where, ... -
Block Diagonal Dominance-Based Model Reduction Method Applied to MMC Asymmetric Stability Analysis
Zong, Haoxiang; Zhang, Chen; Lyu, Jing; Cai, Xu; Molinas Cabrera, Maria Marta (Peer reviewed; Journal article, 2021)Frequency-domain model reduction is a crucial concern in applying the prevailing impedance method for the stability analysis of complex systems, e.g., the modular multilevel converter (MMC). Recently, it has been shown ... -
Generalized MIMO Sequence Impedance Modeling and Stability Analysis of MMC-HVDC With Wind Farm Considering Frequency Couplings
Zong, Haoxiang; Zhang, Chen; Lyu, Jing; Cai, Xu; Molinas Cabrera, Maria Marta; Fangquan, Rao (Peer reviewed; Journal article, 2020)Recently, small-signal stability of the modular multilevel converter (MMC) based high-voltage direct current (HVDC) transmission for wind farm integration has attracted great attentions. The impedance-based frequency-domain ... -
Mimo impedance based stability analysis of DFIG-based wind farm with MMC-HVDC in modifed sequence domain
Zong, Haoxiang; Lyu, Jing; Zhang, Chen; Cai, Xu; Molinas Cabrera, Maria Marta; Rao, Fangquan (Chapter, 2019)The modular multilevel converter (MMC) based high-voltage direct current (HVDC) transmission is widely applied for the large-scale wind farm integration making its interaction stability analysis especially significant. ... -
Modified sequence domain impedance modelling of the modular multilevel converter
Zong, Haoxiang; Lyu, Jing; Zhang, Chen; Molinas Cabrera, Maria Marta; Cai, Xu; Rao, Fangquan (Chapter, 2019)The accurate sequence impedance model of the modular multilevel converter (MMC) is essential for the precise stability analysis of various MMC-based interconnected systems. This paper presents a modified sequence impedance ... -
Understanding the Nonlinear Behaviour and Synchronizing Stability of a Grid-Tied VSC Under Grid Voltage Sags
Zhang, Chen; Molinas Cabrera, Maria Marta; Lyu, Jing; Zong, Haoxiang; Cai, Xu (Chapter, 2019)Transients of a typical grid synchronizing VSC are closely associated with the over-current and over-voltage in circuits. Previous analysis in evaluating such transient phenomenon usually ignore the nonlinear control effects ...