拉萨干式变压器：拉萨干式变压器的热老化

拉萨干式变压器的热老化 　　
拉萨干式变压器运行中产生的损耗转换为热的形式，使绝缘的温度升高，在较高温度下绝缘会产生裂解，因此一般高温下将使电老化加速，绝缘寿命缩短，即绝缘的机械、电气性能逐渐变坏，此过程即为热老化。
拉萨干式变压器的损坏，一般多由热开始，但绝缘中温度分布是不同的，因此绝缘的热老化主要决定于热点温度。拉萨干式变压器运行中的工作温度不应超过绝缘材料允许温度.从而使绝缘共有经济合理的寿命。
实际上，拉萨干式变压器不是处于恒温下运行的，其工作温度随昼夜、季节等环境温度而变化，此时绝缘寿命可由热损坏累积计算法求得。
对于绝缘寿命主要由热老化决定的电气设备，其寿命与负载情况密切相关，若允许负载大，则温升高.绝缘热老化快，寿命短；反之，如要使寿命长.则须将使用温度限制较低，即允许负载较小，则使用时间就较长。
拉萨干式变压器具有一定的经济合理的使用年限，一般定为20-25年，设备寿命不应小于此年限.但也不宜超过太多。根据此预期寿命，就可确定出使用温度。在此温度下。就能保证干变绝缘在正常使用期内安全运行。

Thermal aging of the transformer
D地 址：山东聊城经济开发区华山路南首30号ry-type power transformers run loss is converted to the form of heat, temperature insulation, insulation, cracking at higher temperatures, the average high temperature will allow electrical accelerated aging, shortened insulation life, that is insulated mechanical electrical performance gradually deteriorated, this process is the thermal aging.
Damage to the dry type power transformers, and more generally by heat, but the temperature distribution in the insulation is different, so the insulation of thermal aging major decisions in the hottest temperature. Dry-type transfor联系人：陈经理mer to run the operating temperature should not exceed the insulation material to allow the temperature so that the insulation There are economic and reasonable life.
In fact, dry-type power transformer is not in running under constant temperature, its temperature day and night, seasonal ambient temperature changes, insulation life by thermal damage to the cumulative calculation obtained.
Insulation life is mainly determined by the thermal aging of electrical equipment, its life and load conditions are closely related, if the permissible load, the temperature rise of insulation aging fast, short life; the contrary, make a long life. Shall be used The temperature limit is lower, which allows a smaller load, use the longer time.
The dry type power transformer has a reasonable economic useful life, generally for 20-25 years, the life of the equipment should not be smaller than this of years but not more than too much. According to this life expectancy can be determined using the temperature. At this temperature. We can guarantee that the dry type transformer insulation to run in a normal lifetime security.

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