How to carry out transformer fault diagnosis and maintenance

Transformer as an important equipment in power system, its normal operation is crucial to system stability. However, due to long-term operation or other external factors, transformer may fail. The following are the methods and guidelines for transformer fault diagnosis and maintenance:
1. Troubleshooting

1.1 Observe external indicators:

    Temperature abnormalities: An abnormal increase in the temperature of a transformer may be a sign of a malfunction, requiring timely observation and elimination of abnormal conditions.
    Abnormal vibration or noise of the housing: Abnormal vibration or noise may indicate that internal components are loose or damaged.

1.2 Check electrical parameters:

    Use testing equipment: Use appropriate testing instruments to detect parameters such as current, voltage, and insulation resistance.
    Measuring insulation resistance: Insulation resistance measurement can detect the aging or damage of insulating materials.

1.3 Analyze oil and gas quality:

    Oil quality analysis: Transformer insulation oil is tested to detect the presence of abnormal substances or gases.
    Gas analysis: Monitoring the type and content of gas produced in the oil can detect potential malfunctions.

2. Trouble repair

2.1 Maintenance and cleaning:

    Regular cleaning: Regularly clean the surface of the transformer to prevent dust and dirt from affecting heat dissipation and insulation.
    Clean the insulation part: Clean the insulation part to ensure that the insulation material is in good condition.

2.2 Replace damaged parts:

    Replacement of damaged parts: According to the diagnostic results, replace damaged or aging parts in a timely manner.
    Maintain insulation: Replace or repair damaged insulation.

2.3 Maintenance and repair:

    Periodic overhaul: regular overhaul and maintenance, including insulation measurement, wiring fastening, and insulation oil inspection.
    Maintain oil quality: Regularly check, filter or replace the insulating oil.

2.4 Professional maintenance:

    Professional services: Large-scale maintenance work should be entrusted to a professional maintenance team.
    Follow code: All maintenance work should follow relevant safety regulations and operating guidelines.

Conclusion

Transformer fault diagnosis and repair requires careful observation and professional tools, as well as strict adherence to safe operating procedures. Timely repair and maintenance is essential to ensure the long-term stable operation of the transformer. Maintenance personnel should conduct regular inspections and maintenance to ensure the safe and reliable operation of the equipment to avoid unnecessary losses and safety hazards.