油浸式电力变压器剩余寿命范围及可靠性预测
首发时间:2009-02-05
摘要:现阶段,电力变压器是电网最主要与最贵重的设备并且我国许多大型变压器由于运行了二十年甚至更久的时间,绝缘老化问题日趋严重,是威胁电网安全的重大隐患。通过对变压器固体绝缘材料主要是绝缘纸的拉伸强度与聚合度的分析,提出了变压器剩余寿命范围及可靠性预测的模型,实例结果表示可靠性预测的准确性比较高。
关键词: 油浸式电力变压器 拉伸强度 聚合度 可靠性 寿命范围
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On the Prediction of Oil-immersed power transformers remaining life range and reliability
Abstract:Power transformers are the most important and valuable equipments for power grids at the present stage. Because many big transformers in our country have running twenty years even more long time, theirs problem of insulating aging is increasing serious. This situation becomes the major risk to threaten power grids. By the analysis being insulating paper tensile strength and polymerization degree mainly to transformer solid insulant,have brought forward transformer surplus life-span range and the model that reliability forecasts. Examples of the results of the reliability of the accuracy of the forecasts are relatively high.
Keywords: oil-immersed power transformer tensile degree of polymerization reliability life-span range
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