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Regularity analysis of the temperature distribution of epoxy impregnated paper converter transformer bushings

机译：环氧浸渍纸转化器变压器套管温度分布规律性分析

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摘要

The converter transformer epoxy impregnated paper bushing is a multi-media electrical equipment, and the main materials include the internal conductor, the external conductor, transformer oil, SF6 gas, the air inside internal conductor, the main insulation material epoxy impregnated paper, sheath, and fittings. In actual operating, the converter transformer bushing is undertaken by the harmonic current with large number of high harmonics and the temperature distribution of the epoxy impregnated paper converter transformer bushings under actual current waveform needs to be researched. What's more, the temperature distribution of the epoxy impregnated paper converter transformer bushings is affected by several factors and to provide basis for the optimization of bushings it's necessary to research about the impact of these factors on the temperature distribution of the epoxy impregnated paper converter transformer bushings. In this paper, on the basis of our previous paper [8], the 3-D temperature distribution of the 400 kV epoxy impregnated paper converter transformer bushing under actual current waveform with large number of harmonics has been simulated by using the computational fluid dynamics (CFD) and finite element method (FEM) analysis. The temperature distribution regularity of the 400 kV converter transformer bushing under different influencing factors has been computed and analyzed. The dissipation structure of the bushing has been optimized and the DC steady-state electric field distribution of the 400 kV converter transformer bushing has been obtained considering the temperature gradient in epoxy impregnated paper.
机译：转炉变压器环氧浸渍纸套管是一种多媒体电气设备，主要材料包括内部导体，外部导体，变压器油，SF 6 气体，内部导体内部的空气，绝缘材料环氧树脂浸渍纸，护套和配件。在实际运行中，变流器套管是由高次谐波的谐波电流承担的，需要研究实际电流波形下环氧浸渍纸制变流器套管的温度分布。此外，环氧浸渍纸转化器变压器套管的温度分布受多种因素影响，并且为优化套管提供了基础，有必要研究这些因素对环氧浸渍纸转化器变压器套管的温度分布的影响。 。在本文的基础上，根据我们先前的文献[8]，通过使用计算流体动力学来模拟400 kV环氧浸渍纸换流器变压器套管在实际电流波形下具有大量谐波的3-D温度分布（ CFD）和有限元方法（FEM）分析。计算并分析了400 kV换流变压器套管在不同影响因素下的温度分布规律。优化了套管的耗散结构，并考虑了环氧浸渍纸中的温度梯度，获得了400 kV换流变压器套管的直流稳态电场分布。

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