Browsing by Author "Liang, Jun"

Now showing items 1-8 of 8

    • Admittance study of grid-connected VSCs for harmonic oscillatory instabilities 

      Sainz Sapera, Luis; Monjo, Luis; Cheah Mañé, Marc; Liang, Jun; Gomis Bellmunt, Oriol; Prieto Araujo, Eduardo (2019-09-17)
      Article
      Open Access
      Voltage source converters (VSCs) can reduce damping of grid-connected VSC systems at harmonic resonances, leading to system instability. The conductance of the VSC admittance can be shaped selecting appropriate VSC parameter ...

    • Assessment of subsynchronous oscillations in AC grid-connected VSC systems with type-4 wind turbines 

      Sainz Sapera, Luis; Monjo Mur, Lluís; Cheah Mañé, Marc; Liang, Jun (2019-12-09)
      Article
      Open Access
      Converters are the key for increasing the development of renewable energy generation but their dynamic interaction with the grid has an important impact on stability. Oscillatory instabilities in different grid-connected ...

    • Criterion for the electrical resonance stability of offshore wind power plants connected through HVDC links 

      Cheah Mañé, Marc; Sainz Sapera, Luis; Liang, Jun; Jenkins, Nicholas; Ugalde Loo, Carlos E. (2017-11-01)
      Article
      Open Access
      Electrical resonances may compromise the stability of HVDC-connected offshore wind power plants (OWPPs). In particular, an offshore HVDC converter can reduce the damping of an OWPP at low-frequency series resonances, leading ...

    • Effect of wind turbine converter control on wind power plant harmonic response and resonances 

      Sainz Sapera, Luis; Monjo Mur, Lluís; Pedra Durán, Joaquim; Cheah Mañé, Marc; Liang, Jun; Gomis Bellmunt, Oriol (2017-02-01)
      Article
      Restricted access - publisher's policy
      Wind turbine harmonic emissions due to power electronics are a well-known power quality concern in wind power plants (WPPs). This problem may be increased by resonances because they amplify harmonic distortion around ...

    • Guest editorial special section on HVDC systems for large offshore wind power plants 

      Gomis Bellmunt, Oriol; Liang, Jun; Van Hertem, Dirk; Barnes, Mike; Cutululis, Nicolaos Antonio (2016-04)
      Article
      Open Access
      The papers in this special section focus on HVDC systems for large offshore wind power plants. These plants have experienced an important growth in the last decade and are becoming a key energy source worldwide. Offshore ...

    • Positive-net-damping stability criterion in grid-connected VSC systems 

      Sainz Sapera, Luis; Cheah Mañé, Marc; Monjo, Luis; Liang, Jun; Gomis Bellmunt, Oriol (Institute of Electrical and Electronics Engineers (IEEE), 2017-12-01)
      Article
      Open Access
      Resonance instabilities in power systems can be assessed with the positive-net-damping stability criterion. This criterion is a review of the complex torque coefficients method, but it does not provide the frequency of the ...

    • Study of resonance in wind parks 

      Monjo Mur, Lluís; Sainz Sapera, Luis; Liang, Jun; Pedra Durán, Joaquim (2015-11-01)
      Article
      Open Access
      Wind turbine harmonic current emissions are a well-known power quality problem. These emissions flow through wind park impedances, leading to grid voltage distortion. Parallel resonance may worsen the problem because it ...

    • Wind power plant resonances 

      Sainz Sapera, Luis; Cheah Mañé, Marc; Monjo, Luis; Liang, Jun; Gomis Bellmunt, Oriol (2016-12)
      Article
      Open Access
      Onshore and offshore wind power plants comprising wind turbines equipped with power converters are increasing in number worldwide. Harmonic emissions in power converters distort currents and voltages, leading to power ...