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A modified instantaneous reactive power algorithm for shunt compensation.

Namrata Mishra1, S P Gawande2, Shailesh Deshmukh1

  • 1Department of Electrical Engineering, Kalinga University, Raipur, India.

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Summary
This summary is machine-generated.

This study introduces an enhanced Instantaneous Reactive Power (IRP p-q) theory for Distribution Static Compensators (DSTATCOMs). The improved algorithm effectively compensates for unbalanced and distorted power systems, ensuring better load compensation.

Keywords:
DSTATCOMInstantaneous reactive power theoryUnbalanced and distorted source voltages

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Area of Science:

  • Electrical Engineering
  • Power Systems

Background:

  • Instantaneous Reactive Power (IRP p-q) Theory is a standard for reference current generation in shunt compensation.
  • The basic IRP p-q theory performs poorly under unbalanced and non-sinusoidal source voltages.

Purpose of the Study:

  • To propose a novel approach to the IRP p-q theory for reference current generation in DSTATCOMs.
  • To address limitations of the traditional IRP p-q theory in 3-phase, 4-wire systems with unbalanced, distorted sources, and non-linear loads.

Main Methods:

  • Developed an algorithm using the equal current criteria for magnitude unbalance.
  • Implemented improved formulations with time synchronization of source phase-a voltage for phase unbalance compensation.
  • Utilized fundamental positive sequence extraction to mitigate source current distortion.

Main Results:

  • The proposed approach effectively handles magnitude and phase unbalances in source voltages.
  • It successfully compensates for non-linear loads and distorted source currents.
  • Simulations and experimental results validate the enhanced algorithm's effectiveness under various distortion levels.

Conclusions:

  • The enhanced IRP p-q theory resolves key misconceptions and limitations of the original theory.
  • It provides superior load compensation in 3-phase, 4-wire distribution systems with challenging power quality issues.
  • The method demonstrates robustness and effectiveness in real-world scenarios with distorted supply voltages.