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Related Concept Videos

Fast Decoupled and DC Powerflow01:24

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The fast decoupled power flow method addresses contingencies in power system operations, such as generator outages or transmission line failures. This method provides quick power flow solutions, essential for real-time system adjustments. Fast decoupled power flow algorithms simplify the Jacobian matrix by neglecting certain elements, leading to two sets of decoupled equations:
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Load-frequency control (LFC) is vital for maintaining power system stability, ensuring that frequency and power flows remain within acceptable limits during load changes. Turbine-governor control eliminates rotor accelerations and decelerations following load changes. However, a steady-state frequency error persists when the change in the turbine-governor reference setting is zero. In an interconnected power system, each area agrees to export or import a scheduled amount of power through...
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The power transmission to a factory involves the transfer of apparent power, a combination of active and reactive power. The power factor measures how effectively electrical power is converted into useful work output. The ratio of the real power (KW) that does the work to the apparent power (KVA) supplied to the circuit.
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Turbine-governor control is crucial for maintaining power system stability by balancing turbine mechanical power output with electrical load demand. This mechanism ensures that generator frequency and rotor speed are within acceptable limits during load variations. Turbine-generator units store kinetic energy due to their rotating masses; this energy is released to meet the load requirement when the load increases. The electrical torque of turbines rises to meet the demand, whereas the...
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In a delta-delta configuration, the source and the load are connected in a delta manner, forming a closed loop that divides the network into three distinct phases. This configuration makes the phase voltages identical to line voltages. Assuming the sources are in positive sequence, the phase voltages can be expressed directly without having a neutral wire.
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Enhancing the performance of grid-connected DFIG systems using prescribed convergence law.

Hichem Itouchene1, Fayssal Amrane2, Zoubir Boudries1

  • 1Faculté de Technologie, Laboratoire de Technologie Industrielle et de l'Information (LTII), Université de Bejaia, Bejaia, 06000, Algérie.

Scientific Reports
|August 5, 2025
PubMed
Summary

A new high-order prescribed convergence law control (HO-PCL) strategy significantly improves wind energy conversion systems. This advanced control reduces harmonic distortion and response time, enhancing dynamic performance over conventional methods.

Keywords:
Doubly-fed induction generatorsHardware-in-the-loopHigh-order prescribed convergence law controlSliding mode controlTotal harmonic distortionWind energy conversion system

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Area of Science:

  • Electrical Engineering
  • Renewable Energy Systems
  • Control Theory

Background:

  • Wind energy conversion systems (WECS) face challenges with conventional control methods like super-twisting algorithm (STA), integral backstepping control (IBCS), and first-order sliding mode control (1-SMC) due to the chattering phenomenon.
  • Doubly-fed induction generator (DFIG) based WECS require robust control for efficient power regulation.

Purpose of the Study:

  • Introduce a novel high-order prescribed convergence law control (HO-PCL) strategy for WECS.
  • Address limitations of existing control methods, specifically the chattering issue.
  • Enhance dynamic response by improving response time and minimizing power error in active and reactive power regulation.

Main Methods:

  • Development and application of the HO-PCL strategy to the rotor-side converter of a DFIG-based WECS.
  • Comparative analysis using MATLAB/Simulink simulations and hardware-in-the-loop (HIL) testing.
  • Performance evaluation against proportional-integral (PI) controller, 1-SMC, and IBCS.

Main Results:

  • HO-PCL reduced stator current total harmonic distortion by 94.01% (vs. PI), 91.05% (vs. 1-SMC), and 85% (vs. IBCS).
  • Response time was reduced by 99.25% (vs. PI), 98.96% (vs. 1-SMC), and 93% (vs. IBCS).
  • Significant improvements in power ripple and overshoot were observed compared to other strategies.

Conclusions:

  • The HO-PCL strategy offers a robust and effective solution for WECS control.
  • It overcomes the chattering phenomenon and enhances dynamic performance.
  • HO-PCL demonstrates potential for advancing control methodologies in wind power systems.