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Variation of Steady-State Thermal Characteristics of Transformers with OFWF Cooling in Service

机译：使用中的OFWF冷却的变压器稳态热特性的变化

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摘要

The paper presents the thermal model for top oil temperature calculation in transformers with forced oil and water circulation. The model is completely based on the heat transfer theory. The thermal parameters change in time, due to the sedimentation of substances from the water and the oil to the heat exchanger surfaces. Fouling factors at the water and oil sides can be determined based on measurements. The results of procedure application on the hydro power station block transformer 2 x 190 MVA/380 MVA are given in the paper. The model is aimed at estimation of transformer loading possibilities, but also at maintenance or reconstruction planning purposes.
机译：本文介绍了用于强制油水循环的变压器顶油温度计算的热模型。该模型完全基于传热理论。由于物质从水和油到热交换器表面的沉淀，热参数随时间变化。可以根据测量结果确定水和油侧的污染因子。文中给出了在2 x 190 MVA / 380 MVA的水电站分块变压器上应用程序的结果。该模型旨在估算变压器的负载可能性，也旨在进行维护或重建计划。

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