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Study on the effect of impulse voltage withstandability on the thermally-aged transformer paper

机译:脉冲电压耐受性对热老化变压器纸的影响研究

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Transformers play an important role in power transmission. It is, therefore, necessary to know the condition, once the transformer becomes aged. Presently, residual life assessment (RLA) methods are being extensively used to know its condition. The insulation system of a transformer consists of mainly oil and paper; and hence, the conditions of these two materials are critical for reliable operation of transformer. Methodologies are available for RLA studies using different parameters like dissolved gas analysis (DGA), furfural content, and degree of polymerization (DP) etc. However, it is also necessary to study the impulse withstandability of cellulose paper and establish its relationship with DP. In this paper, the effect of ageing of cellulose paper on DP, dielectric strength and impulse withstandability has been studied and a methodology has been developed to know the condition of paper vis-a-vis the impulse withstandability and dielectric strength.
机译:变压器在动力传输中起着重要作用。因此,一旦变压器老化,就必须知道状况。当前,剩余寿命评估(RLA)方法被广泛用于了解其状​​况。变压器的绝缘系统主要由油和纸组成。因此,这两种材料的条件对于变压器的可靠运行至关重要。使用不同的参数(例如溶解气体分析(DGA),糠醛含量和聚合度(DP)等)进行RLA研究的方法可用。但是,也有必要研究纤维素纸的脉冲耐受性并建立其与DP的关系。在本文中,研究了纤维素纸的老化对DP,介电强度和耐冲击性的影响,并开发了一种方法来了解纸的状况,以相对于耐冲击性和介电强度。

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