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Fluid Degradation Measurement Based on a Dual Coil Frequency Response Analysis.

Jose M Guerrero1, Alejandro E Castilla1, José Ángel Sánchez-Fernández2

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Summary

A novel transformer-like sensor effectively monitors the quality of industrial cooling fluids, detecting contaminants like water in oil and salt in water. This technology helps preserve the integrity of critical electrical equipment, preventing malfunctions.

Keywords:
capacitive sensorsdegradationfault diagnosisfrequency response analysismagnetic sensorsoil insulationpredictive maintenance

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Area of Science:

  • Electrical Engineering
  • Materials Science
  • Chemical Sensing

Background:

  • Electrical equipment, including power transformers and generators, relies on cooling fluids like oil and water.
  • Maintaining the quality of these fluids is crucial for preventing equipment malfunctions and ensuring operational reliability.
  • Current methods for fluid quality assessment may be insufficient for real-time monitoring and early detection of contamination.

Purpose of the Study:

  • To develop and evaluate a novel sensor for real-time monitoring of electrical fluid composition.
  • To assess the sensor's capability in detecting common contaminants such as water in oil and salt in water.
  • To provide a reliable method for preserving fluid quality and preventing electrical asset failures.

Main Methods:

  • A single-phase transformer-based sensor design where the fluid acts as the magnetic core.
  • Frequency sweep analysis to record the sensor's response.
  • Comparison of real-time measurements against a reference baseline for a healthy state.
  • Simulation analysis and prototype testing for performance validation.

Main Results:

  • The sensor demonstrated effective detection of water in oil and salt in water.
  • Simulations confirmed the sensor's performance.
  • Prototype testing showed a good correlation between measured and known pollutant concentrations.
  • The sensor's frequency response accurately reflects changes in fluid composition.

Conclusions:

  • The developed transformer-like sensor is a promising tool for monitoring the quality of industrial cooling fluids.
  • This technology enables early detection of contaminants, aiding in the prevention of electrical equipment malfunctions.
  • The sensor offers a reliable and potentially cost-effective solution for maintaining fluid integrity in the electrical industry.