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变压器油厂家分析何为纤维素降解?

发布时间2020-03-12  来源:http://www.jnwdsh.com

  纤维素降解主要涉及聚合物链在热力影响下的氧化、水解或断裂。
  Cellulose degradation mainly involves the oxidation, hydrolysis or fracture of polymer chains under the influence of heat.
  电力变压器的总体预期寿命在很大程度上取决于绝缘纤维能够承受故障条件产生的机械应力。这种固体绝缘的耐受能力会随着运行时间的增加而降低。
  The overall life expectancy of power transformer depends largely on the ability of insulating fiber to withstand the mechanical stress generated by fault conditions. The resistance of this kind of solid insulation will decrease with the increase of operation time.
  电力变压器绝缘板的老化通常归因于热劣化。在热劣变中,纤维素聚合物链的平均长度因断裂而缩短,而随着温度的升高,断裂的发生频率更高。纤维素聚合物链缩短造成绝缘纸板的物理性能下降,导致其伸强度、拉伸失效前的伸长率、撕裂强度、断裂或爆裂强度降低。
  The aging of power transformer insulation board is usually attributed to thermal degradation. In thermal degradation, the average length of cellulose polymer chain is shortened due to fracture, and the fracture frequency is higher with the increase of temperature. The shortening of the cellulose polymer chain results in the decrease of the physical properties of the pressboard, which leads to the decrease of its tensile strength, elongation before tensile failure, tearing strength, breaking or bursting strength.
  在对运行中配电变压器进行日常巡视检查中,常会发现一些器体内变压器油油位不在规定范围内。
  In the daily patrol inspection of distribution transformer in operation, it is often found that the oil level of transformer in some transformers is not within the specified range.
山东变压器油
  而当变压器内的油下降到变压器外壳以下时,变压器油和空气的接触面增大,油极易吸收水分,氧化变质,使变压器油的耐压强度降低,破坏线圈的绝缘性能。
  When the oil in the transformer drops below the transformer shell, the contact surface between the transformer oil and air increases, the oil is easy to absorb moisture, oxidize and deteriorate, reduce the withstand voltage strength of the transformer oil, and damage the insulation performance of the coil.
  缺油严重时,使变压器导电部位对地或相与相之间的绝缘降低,造成相间或对地击穿放电,继续使用会使油温急剧上升,缩短变压器的寿命甚至烧毁变压器。
  When the oil shortage is serious, the insulation of the conductive part of the transformer to the ground or between phases will be reduced, which will cause the breakdown and discharge between phases or to the ground. The continuous use will make the oil temperature rise sharply, shorten the service life of the transformer and even burn down the transformer.
  因此为保证变压器能够正常安全运行,需要及时查找原因后并给变压器加油
  Therefore, in order to ensure the normal and safe operation of the transformer, it is necessary to find out the cause in time and refuel the transformer
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