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Related Concept Videos

The Power Flow Problem and Solution01:26

The Power Flow Problem and Solution

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Power flow problem analysis is fundamental for determining real and reactive power flows in network components, such as transmission lines, transformers, and loads. The power system's single-line diagram provides data on the bus, transmission line, and transformer. Each bus k in the system is characterized by four key variables: voltage magnitude Vk​, phase angle δk​, real power Pk​, and reactive power Qk​. Two of these four variables are inputs, while the...
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There are several methods to control power flow in power systems:
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Fast Decoupled and DC Powerflow01:24

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Active filters are electronic circuits that use operational amplifiers (op-amps), resistors, and capacitors to filter out unwanted frequency components from a signal. A first-order low-pass active filter is designed to pass signals with a frequency lower than a certain cutoff frequency and attenuate frequencies higher than that cutoff frequency. The transfer function for a first-order low-pass active filter is:
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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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Determining the subtransient fault current in a power system involves representing transformers by their leakage reactances, transmission lines by their equivalent series reactances, and synchronous machines as constant voltage sources behind their subtransient reactances. In this analysis, certain elements are excluded, such as winding resistances, series resistances, shunt admittances, delta-Y phase shifts, armature resistance, saturation, saliency, non-rotating impedance loads, and small...
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Related Experiment Video

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Instrumentation for Verification of Shunt Active Power Filter Algorithms.

Jan Baros1, Petr Bilik1, Rene Jaros1

  • 1Department of Cybernetics and Biomedical Engineering, VSB-Technical University of Ostrava, 17. Listopadu 15, 708 33 Ostrava, Czech Republic.

Sensors (Basel, Switzerland)
|October 28, 2023
PubMed
Summary

This study introduces a system for testing shunt active power filter (APF) control methods. The experimental platform achieved an average 22% reduction in total harmonic distortion, aiding objective method comparison.

Keywords:
LabVIEWNotch–LMSNotch–RLSSAPFvirtual instrumentation

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Area of Science:

  • Electrical Engineering
  • Power Electronics
  • Control Systems

Background:

  • Shunt active power filters (APFs) are crucial for mitigating power quality issues.
  • Objective comparison of APF control methods is challenging due to varying experimental setups.
  • Existing verification systems lack comprehensive tools for direct control method evaluation.

Purpose of the Study:

  • To develop and validate a versatile experimental platform for testing shunt active power filter control strategies.
  • To enable objective, quantitative comparison of different APF control algorithms.
  • To demonstrate the platform's efficacy in verifying control method performance.

Main Methods:

  • Implementation of a hardware-based experimental platform featuring a controlled current injection source.
  • Utilization of virtual instrumentation and control software for system management.
  • Verification using least mean squares (LMS) and recursive least squares (RLS) algorithms.

Main Results:

  • Successful verification of the experimental platform's functionality.
  • Achieved an average relative suppression of total harmonic distortion (THD) by 22%.
  • Demonstrated the platform's capability to objectively compare control methods.

Conclusions:

  • The developed experimental system provides a valuable tool for APF control method research.
  • The platform's design facilitates objective performance evaluation and comparison.
  • Future work includes integrating a cRIO RTOS for reduced latency in reference current generation.