As an important equipment in the power system, the operating stability and safety of dry-type transformers are directly related to the reliable operation of the entire system. As one of the key factors affecting the performance of dry-type transformers, ambient temperature has strict requirements on it.
Dry-type transformers requirements for ambient temperature
1. Ambient temperature range
Dry-type transformers are closed, naturally cooled equipment. And their operating ambient temperature range should be between -30℃ and +40℃. If the ambient temperature exceeds this range, it will affect the normal operation of the transformer.
2. Temperature rise limit
Dry-type transformers will produce a certain temperature rise during normal operation. It is necessary to pay attention to setting the temperature rise limit to ensure that the equipment will not be damaged or unable to operate normally. In general, the temperature rise limit is 145℃. In special circumstances, it can be adjusted appropriately, but it cannot exceed 165℃.
3. Special requirements in high temperature environments
If the temperature of the operating environment of the dry-type transformer exceeds 40℃, special treatment of the equipment is required. For example, sun protection and shading facilities should be set up around the outdoor equipment, and ventilation devices should be set up inside the transformer to effectively reduce the temperature rise and ensure the normal operation of the equipment.
4. Special requirements in low temperature environments
Dry-type transformers need to take some special measures when the operating environment temperature is lower than -20℃. For example, insulation measures should be set up around the equipment to avoid condensation on the equipment; Heating devices should be added inside the transformer to ensure that the equipment can operate normally.
Effect of ambient temperature on dry-type transformer performance
Insulation performance: The insulation material of dry-type transformers is sensitive to temperature. Excessively high ambient temperature will accelerate the aging process of the insulation material, resulting in a decrease in insulation performance, thereby increasing the risk of transformer failure. Therefore, maintaining a suitable ambient temperature is essential for maintaining the insulation performance of dry-type transformers.
Heat dissipation performance: Dry-type transformers will generate a certain amount of heat during operation, which needs to be discharged through the heat dissipation system. Excessively high ambient temperature will affect the efficiency of the heat dissipation system, causing the internal temperature of the transformer to rise, which in turn affects its performance and life. On the contrary, at a suitable ambient temperature, the heat dissipation system can work more effectively and keep the internal temperature of the transformer stable.
Load capacity: Ambient temperature also affects the load capacity of dry-type transformers. In high temperature environments, the heat dissipation capacity of the transformer is limited, so the load it can withstand will also be reduced accordingly. This may cause the transformer to be more prone to failure under overload conditions.
Dry-type transformers have strict requirements on ambient temperature. In order to maintain the stability of its performance and extend its service life, it is necessary to ensure that the transformer operates at a suitable ambient temperature and take corresponding measures to optimize its heat dissipation performance. Through scientific and reasonable ambient temperature management, the reliability and safety of dry-type transformers can be further improved, providing strong guarantees for the stable operation of the power system.
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