Reliable life of transformer
Time：2024-11-28 Auther：ZTelec-www.ztelectransformer.com
Transformer is an indispensable and important equipment in power system, its life and scrap life are very important for the stable operation of power system. So, how much is the life and scrap life of the transformer?
According to relevant national standards, the service life of the transformer is generally 20-30 years. This refers to the maximum time that the transformer can operate safely under rated conditions. However, this is only a rough reference range, and the actual service life will be affected by a variety of factors.
Dry type power distribution transformer
Type of transformer
Different types of transformers have different service life. For example:
Dry type transformer: Its service life is relatively long, generally can be used for 20 to 30 years.
Oil-immersed transformer: The service life is generally between 10 and 20 years, but if effective maintenance measures are taken, such as regular testing, maintenance and cleaning of the oil pool, its service life can be extended.
Autotransformer: Its service life is comparable to that of oil-immersed transformers, about 10 to 20 years. Because of its simple structure and low maintenance cost, its service life is relatively long.
Factors affecting transformer life
1. Overload
Overload is one of the main factors affecting transformer life. When the load of the transformer exceeds the rated capacity, the temperature of the transformer will rise, which will accelerate the aging of the transformer insulation material, thus affecting the life of the transformer. Therefore, when using the transformer, we must pay attention to the reasonable distribution of the load to avoid overload.
2. Overheating
Overheating is also an important factor affecting transformer life. When the transformer is running, heat will be generated, and if the heat dissipation is poor, the transformer temperature will be too high, which will affect the transformer life. Therefore, when installing the transformer, sufficient heat dissipation conditions must be ensured to avoid overheating.
3.Humidity
Humidity is also one of the factors affecting transformer life. When the transformer is in a humid environment for a long time, it will lead to the aging of the insulation material, which will affect the life of the transformer. Therefore, when using the transformer, you must pay attention to moisture and avoid being in a humid environment for a long time.
4. Improper maintenance
The maintenance of the transformer is also an important factor affecting the life of the transformer. If the transformer is not maintained or improperly maintained for a long time, it will lead to problems such as increased deposits inside the transformer and aging insulation materials, which will affect the life of the transformer. Therefore, when using the transformer, regular maintenance must be carried out to ensure that the transformer is in good working condition.
Method of extending transformer life
1. Reasonable operation and maintenance
Regular maintenance:
Regular maintenance and overhaul of the transformer, removal of dirt, check insulation conditions, etc., help to extend its life.
Keep the operating environment clean:
The cleanliness of the surrounding environment of the transformer directly affects its heat dissipation effect. Keeping the surrounding environment clean can effectively reduce the temperature of the transformer and extend its service life.
Control load:
Avoid the transformer in overload or low load state for a long time, overload will cause the transformer to heat too much, and low load may cause partial discharge and other problems.
Regular oil quality analysis:
By regularly analyzing the oil quality of the transformer, the internal problems of the transformer can be found in time and corresponding measures can be taken to ensure its normal operation.
2. Adoption of advanced technology and materials
Use of low-loss materials:
Adopting low-loss materials can effectively reduce the energy loss of the transformer during operation, reduce its heat generation and prolong its service life.
Adopt advanced insulation materials:
High-quality insulation materials can improve the insulation performance of the transformer, reduce the speed of insulation aging, and extend the service life of the transformer.
Regular technical transformation:
With the progress of science and technology, new technologies are constantly emerging. Technical transformation of the existing transformer can improve its operating efficiency, reduce energy consumption and extend its service life.
3. Enhanced equipment monitoring and diagnostics
Utilize advanced equipment monitoring and diagnosis technology:
Real-time monitoring of the operating status of the transformer, timely detection of abnormalities, and taking appropriate measures to ensure its safe operation.
Check the tap changer:
Regularly check the contact fastening, burns, scars, rotational flexibility and positioning of contacts of the on-load tap-changer to ensure the normal operation of the on-load tap-changer.
Ensure safe and reliable operation of the cooling unit:
Check that the butterfly valves of the cooler inlet and outlet pipes are in the open position, that the air inlet to the radiator is smooth, and that the inlet is clean and free of debris.
Check that the submersible oil pump is turned correctly, and that there is no strange sound and obvious vibration during operation; ensure that the fan is running normally.
The automatic switch of the split power supply in the cooler control box is closed well, without vibration and abnormal sound; the cooler has no oil leakage.
