Methods to Improve Maintenance Effectiveness of Oil-Immersed Transformers

Regularly Inspect Oil Quality and Insulation Performance: Oil quality and insulation performance are key factors determining the normal operation of oil-immersed transformers. Regularly check the transformer oil quality, including turbidity, water content, and gas content, to timely detect impurities and contaminants in the oil and ensure the transformer’s normal operation. Meanwhile, periodically test the oil’s insulation performance, such as dielectric strength and conductivity, to prevent insulation breakdown and electric leakage of the transformer.

Cleaning and Insulation Treatment: Regularly clean and perform insulation treatment on oil-immersed transformers to effectively remove surface dust and dirt, improving insulation performance and heat dissipation efficiency. During cleaning, ensure no water or other liquids enter the transformer interior to avoid affecting its normal operation.

Clean Radiators and Ventilation Holes: Radiators and ventilation holes are critical components for heat dissipation of oil-immersed transformers. Regularly cleaning these components ensures normal heat dissipation of the transformer, preventing overheating and damage. When cleaning, avoid damaging the radiators and ventilation holes to maintain their proper functionality.

Check and Adjust Oil Level: The oil level in an oil-immersed transformer is an important indicator of its normal operation. Excessively high or low oil levels will affect the transformer’s heat dissipation and insulation performance. Regularly check the oil level and adjust as needed to ensure it remains within the normal range.

Regularly Maintain Oil Pumps and Cooling Systems: Oil pumps and cooling systems are key components for the normal operation of oil-immersed transformers. Regular maintenance of these components ensures the transformer works properly. Conduct regular inspections and maintenance on oil pumps to guarantee their smooth operation; meanwhile, keep the cooling system clean and unobstructed to ensure effective heat dissipation.

Inspect and Replace Aging Components: Components in oil-immersed transformers will age over time. Regularly inspecting and replacing aging components can extend the transformer’s service life and improve its reliability, such as insulators, bushings, and disconnect switches.

Conduct Regular Tests and Inspections: Periodically perform tests and inspections on oil-immersed transformers to identify potential faults and issues for timely repair and handling. Common tests include partial discharge tests and insulation resistance tests.