Blar i NTNU Open på forfatter "Lyu, Jing"
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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 Bifurcation Behaviors in MMC Connected to a Weak Grid
Haoxiang, Zong; Lyu, Jing; Xu, Cai; Molinas Cabrera, Maria Marta; Zhang, Chen; Renxing, Yang; Fangquan, Rao (Chapter, 2018)Conventional small-signal approaches present obvious advantages applied in analyzing closed-loop stability in power electronics systems. However, linearized models fall short of predicting any nonlinear behavior which means ... -
Frequency Domain Stability Analysis of MMC-Based HVdc for Wind Farm Integration
Lyu, Jing; Cai, Xu; Molinas Cabrera, Maria Marta (Journal article; Peer reviewed, 2016)This paper investigates the stability of offshore wind farms integration through a modular multilevel converter-based high-voltage dc (MMC-HVdc) transmission system. Resonances or instability phenomena have been reported ... -
Harmonic State-Space Based Small-Signal Impedance Modeling of Modular Multilevel Converter with Consideration of Internal Harmonic Dynamics
Lyu, Jing; Zhang, Xin; Cai, Xu; Molinas Cabrera, Maria Marta (Journal article; Peer reviewed, 2018)The small-signal impedance modeling of a modular multilevel converter (MMC) is the key for analyzing resonance and stability of MMC-based power electronic systems. The MMC is a power converter with a multifrequency response ... -
Harmonic Transfer-function-based Impedance Modelling of a Three-phase VSC for Asymmetric AC Grids Stability Analysis
Zhang, Chen; Molinas Cabrera, Maria Marta; Rygg, Atle; Lyu, Jing; Cai, Xu (Journal article; Peer reviewed, 2019)Impedance modeling and stability analysis of a grid-VSC system under symmetric ac grids have been extensively discussed in the literature, where the dq domain impedances are usually adopted. As for asymmetric ac grids, ... -
Impact of power flow direction on the stability of VSC-HVDC seen from the impedance nyquist plot
Amin, Mohammad; Molinas Cabrera, Maria Marta; Lyu, Jing; Cai, Xu (Journal article, 2017)The high-voltage dc (HVDC) systems are appearing more and more, and it is becoming a requirement that the HVDC voltage-source converters (VSCs) operate both as an inverter and a rectifier without changing the controls to ... -
Impact of Power Flow Direction on the Stability of VSC-HVDC Seen from the Impedances Nyquist Plot
Amin, Mohammad; Molinas Cabrera, Maria Marta; Lyu, Jing; Cai, Xu (Journal article; Peer reviewed, 2016)The high-voltage dc (HVDC) systems are appearing more and more, and it is becoming a requirement that the HVDC voltage-source converters (VSCs) operate both as an inverter and a rectifier without changing the controls to ... -
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 ... -
Optimal Design of Controller Parameters for Improving the Stability of MMC-HVDC for Wind Farm Integration
Lyu, Jing; Cai, Xu; Molinas Cabrera, Maria Marta (Journal article, 2017)A subsynchronous oscillation (SSO) phenomenon has been observed in a modular multilevel converter-based high-voltage DC (MMC-HVDC) transmission system for wind farm integration in the real world, which is independent of ... -
Stabilization control methods for enhancing the stability of wind farm integration via an MMC-based HVDC system
Lyu, Jing; Molinas Cabrera, Maria Marta; Cai, Xu (Book, 2017)The subsynchronous oscillation (SSO) phenomenon may occur in a modular multilevel converter-based high-voltage dc (MMC-HVDC) transmission system for wind farm integration, which has already been observed in the real world. ... -
Subsynchronous Oscillation Mechanism and Its Suppression in MMC-Based HVDC Connected Wind Farms
Lyu, Jing; Cai, Xu; Amin, Mohammad; Molinas Cabrera, Maria Marta (Journal article, 2017)A subsynchronous oscillation (SSO) phenomenon in a wind farm integrated with a modular multilevel converter (MMC)-based high-voltage direct current (HVDC) transmission system has been recently observed in the real world. ... -
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 ...