Why is furan analysis used in transformer oil?
What is a furan analysis test?
Transformers, vital components in power distribution systems, rely on solid insulation for optimal performance. As transformers age, the cellulose insulation within them undergoes chemical changes, leading to the production of furanic compounds. Furanic Analysis, a diagnostic test, provides a comprehensive understanding of the health of this insulation. In this article, we explore the different types of furanic analysis tests conducted on transformers and how their results offer insights into the condition of cellulose insulation.
- Furfural Content Measurement:
- Test: Measuring the concentration of furfural in transformer oil.
- Result Interpretation: Increased furfural levels indicate breakdowns in cellulose insulation, potentially due to overheating or stress.
- Furanic Ratio Analysis:
- Test: Analyzing the ratio of various furanic compounds.
- Result Interpretation: Changes in furanic ratios provide insights into the type and severity of aging, helping identify specific stressors like thermal aging.
- Degree of Polymerization (DP) Measurement:
- Test: Assessing the average molecular weight of cellulose.
- Result Interpretation: A decrease in DP signals degradation in insulation, pointing to potential thermal or electrical stress.
- Total Combustible Gas Measurement:
- Test: Analyzing total combustible gases, including furanic compounds.
- Result Interpretation: Elevated combustible gas levels suggest increased aging and potential insulation degradation.
- Delta Furfural Analysis:
- Test: Measuring the rate of change of furfural concentration over time.
- Result Interpretation: A rapid increase in delta furfural indicates an accelerating aging process, warranting further investigation.
- Furanic Compounds Identification:
- Test: Identifying specific furanic compounds present in the oil.
- Result Interpretation: Different compounds reveal diverse sources and implications, such as overheating or electrical stress.
Interpreting Results:
- Normal Conditions: Low and stable furanic compound levels indicate healthy cellulose insulation under regular operating conditions.
- Moderate Aging: Gradual increases in furanic compounds suggest moderate aging, a natural part of the transformer’s lifecycle.
- Significant Aging or Faults: Rapid increases or elevated levels of furanic compounds may indicate severe aging, overheating, or potential faults, prompting further investigation and corrective actions.
Conclusion:
Furanic Analysis stands as a crucial tool in predicting potential issues in transformers, providing an opportunity for proactive maintenance and mitigating the risk of