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Enhancing low voltage ride through capability of grid connected DFIG based WECS using WCA-PSO tuned STATCOM

Irene Ndunge Muisyo1, Christopher Maina Muriithi2, Stanley Irungu Kamau3

  • 1Pan African University Institute for Basic Sciences, Technology, and Innovation (PAUSTI), Kenya.

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Summary

This study enhances wind power plant fault ride-through using a STATCOM. Optimized with hybrid WCA-PSO, it significantly improves Low Voltage Ride-Through (LVRT) during grid faults.

Keywords:
LVRTPSOSTATCOMVSIWCA

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Area of Science:

  • Electrical Engineering
  • Power Systems Engineering
  • Renewable Energy Systems

Background:

  • Doubly-fed induction generators (DFIG) are crucial for wind power integration.
  • Grid codes mandate Low Voltage Ride-Through (LVRT) capability for wind power plants (WPPs).
  • Grid faults can compromise WPP stability and LVRT.

Purpose of the Study:

  • To investigate the effectiveness of a STATCOM in enhancing the LVRT capability of a 9 MW DFIG-based WPP.
  • To tune the STATCOM using Water Cycle Algorithm (WCA), Particle Swarm Optimization (PSO), and a hybrid WCA-PSO algorithm.
  • To analyze and compare system performance during grid voltage sags with different STATCOM tuning methods.

Main Methods:

  • Simulations conducted in MATLAB using the SimScape toolbox.
  • Performance evaluation based on LVRT capability during grid faults (L-G and LLL-G).
  • Comparison of STATCOM performance tuned with WCA, PSO, and hybrid WCA-PSO algorithms.

Main Results:

  • The Danish power system met LVRT for L-G faults.
  • Without STATCOM, WPP failed to ride through LLL-G faults.
  • STATCOM incorporation enabled LVRT compliance.
  • Voltage fluctuations reduced from 17% to 3% (L-G faults) and 60% to 25% (LLL-G faults) with WCA-PSO tuned STATCOM.
  • WCA-PSO tuned STATCOM minimized voltage, active, and reactive power overshoots.

Conclusions:

  • STATCOM significantly enhances LVRT capability of DFIG-based WPPs.
  • The hybrid WCA-PSO algorithm provides optimal STATCOM tuning for improved fault ride-through.
  • Implementing STATCOM with advanced tuning strategies is essential for reliable wind power integration.