温州干式变压器:温州干式变压器绝缘老化
温州干式变压器绝缘老化
温州干式变压器运行中要承受所加电场和空载损耗、负载损耗筹产生的热量作用对绝缘的影响。此外还有环境(如空气中的温度)对绝缘的影响。绝缘材料在电场强度、热及其它因素的影响下,而导致绝缘老化.逐渐导致绝缘击穿,即绝缘完全丧失电气性能。
绝缘击穿的物理特性的分析与所有试验结果基本一致,即在时间空间上均呈概率分布。从概率一时间特性上,击穿可分为初期击穿、突发性(偶发性)击穿及老化击穿三阶段。
初期击穿可能是制造上的差错.绝缘中存在弱点所致:突发性击穿是产品本来的性质确定的;老化击穿是随着运行时间的增长,绝缘老化的结果。
温州干式变压器为户内式装置.因而其受环境因素的影响,较户外式设备要小得多。
Transformer insulation aging
Dry-type power transformer operation to withstand the applied electric field and no-load loss, load loss to raise the heat generated by the role of insulation. There is also the environment (eg air temperature) insulation. Insulating materials under the influence of the electric field strength, thermal, and other factors, caused by insulation aging gradually lead to insulation breakdown, insulation that is, complete loss of electrical performance.
Analysis of the physical characteristics of insulation breakdown with all test results, showed a probability distribution in time and space. From the time characteristics on the probability of a breakdown can be divided into the breakdown of the initial burst (sporadic) breakdown and the aging of the breakdown of three stages.
The early breakdown may be errors in manufacturing. Insulation weaknesses due to: the sudden breakdown products was determined by nature; aging breakdown With the growth of running time, the insulation aging.
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