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Browsing NTNU Open by Author "Lyu, Jing"

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Now showing items 1-13 of 13

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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 ...

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