Fluid Degradation Measurement Based on a Dual Coil Frequency Response Analysis

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.