What are the impacts of wind speed on the operation of transformers? (Part 1)

In the design and operation evaluation of power facilities, the maximum wind speed value within a certain period of time at a specific distance above the ground is usually clearly defined. For example, it is commonly adopted to observe the wind speed reached within 10 minutes at a height of 10 meters above the ground. A wind speed value like 35 meters/second is an indicator of great significance.

This regulation and measurement method is based on the combination of scientific meteorological observation methods and engineering practical experience. It can relatively accurately reflect the wind speed characteristics of the environment where the transformer is located, providing a reliable data basis for the subsequent analysis of the impacts of wind speed on the operation of the transformer, enabling us to more specifically study and deal with various challenges brought by wind speed.

Content

● Impacts on bushings

● Generation of mechanical stress
The bushing on the transformer tank is directly exposed to the external environment and is one of the key components affected by wind speed. When a strong wind hits, the bushing will be subject to a powerful wind impact, thereby generating mechanical stress. This mechanical stress may cause the bushing to sway, and under the continuous action of the wind, it may further lead to twisting or even deformation. If the mechanical strength of the bushing itself is insufficient to resist the stress brought by this wind, its structure may be damaged. Once the structure is damaged, the insulation performance of the bushing will be affected, and problems such as partial discharge may occur, reducing the insulation effect; at the same time, the sealing performance will also be damaged, and it will be unable to effectively prevent the intrusion of external impurities and moisture, laying hidden dangers for the safe operation of the transformer.

● Impact on sealing performance
In windy weather, the sealing structure between the bushing and the transformer tank faces a severe test. Strong winds may cause the sealing parts to be subject to uneven pulling and squeezing forces. Being in this stress state for a long time, the sealing parts are prone to fatigue aging and deformation, resulting in sealing failure. Once the sealing fails, the transformer oil may leak. This will not only affect the normal heat dissipation of the transformer because oil is one of the important media for transformer heat dissipation, but also cause the internal insulation performance of the transformer to decline because the leakage of oil may cause the insulation part to be exposed to the air, absorb moisture and impurities, and further reduce the insulation strength.

In Summary

In addition, external impurities such as dust and moisture may also enter the inside of the bushing along the part where the sealing fails, further damaging its insulation performance and greatly increasing the probability of transformer failure.

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LuShan, est.1975, is a Chinese professional manufacturer specializing in power transformers and reactors for 49 years. Leading products are single-phase transformer, three-phase isolation transformers,electrical transformer,distribution transformer, step down and step up transformer, low voltage transformer, high voltage transformer, control transformer, toroidal transformer, R-core transformer;DC inductors, AC reactors, filtering reactor, line and load reactor, chokes, filtering reactor, and intermediate,high-frequency products.

Our power transformers and reactors are widely used in 10 application areas: rapid transit, construction machinery, renewable energy, intelligent manufacturing, medical equipment, coal mine explosion prevention , excitation system, vacuum sintering(furnace), central air conditioning.

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