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首页> 外文期刊>IEEE Transactions on Dielectrics and Electrical Insulation >Experimental simulation of effects of high temperatures on paper oil insulation of transformers in presence of DBDS in mineral oil
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Experimental simulation of effects of high temperatures on paper oil insulation of transformers in presence of DBDS in mineral oil

机译：矿物油中存在DBDS时高温对变压器纸油绝缘影响的实验模拟

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The effect of elevated temperatures induced by over currents on the performance of paper oil insulation of transformer is investigated. This study has been carried out in presence of spiked concentrations of Dibenzyl disulphide (DBDS) in mineral oil for understanding its effects on copper sulphide formation. The dielectric response of paper oil insulation when subjected to elevated temperatures is studied using frequency domain spectroscopy and measurement of polarization and depolarization current. It is observed that there are significant variations in tan δ (dissipation factor) and magnitudes of polarization and depolarization currents of paper oil insulation due to high temperatures. A characteristic peak of tan δ around 0.1 Hz in the FDS response is observed to indicate the presence of copper sulphide on paper. A FEM based thermal model is proposed to explain the distribution of thermal conductivity and temperature gradient in paper oil insulation due to copper sulphide deposits.
机译：研究了过电流引起的高温对变压器纸油绝缘性能的影响。这项研究是在矿物油中加标浓度的二苄基二硫化物（DBDS）存在的情况下进行的，以了解其对硫化铜形成的影响。使用频域光谱学和极化和去极化电流的测量研究了纸油绝缘体在高温下的介电响应。可以看出，由于高温，tanδ（耗散因数）和纸绝缘油的极化电流和去极化电流的大小存在显着变化。在FDS响应中，大约0.1 Hz处t​​anδ的特征峰被观察到，表明纸上存在硫化铜。提出了一种基于FEM的热模型来解释由于硫化铜沉积而导致的纸油绝缘中导热系数和温度梯度的分布。

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