| 不同缺陷下油纸绝缘套管中氢气生成特性研究 |
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| 引用本文：张璐1,孙蕾2,韩彦华1,王洋3,赵恒3,陈晋鹏3,杨昊3.不同缺陷下油纸绝缘套管中氢气生成特性研究[J].电网与清洁能源,2021,37(7):44~50 |
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| 基金项目:国家自然科学基金（52007138）；陕西省自然科学基金（2021JM-450） |
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| 中文摘要:近年来，因变压器套管故障导致的电力事故频发，严重影响了电力网的安全稳定运行。变压器套管在制造、安装以及运行过程中都可能存在内部绝缘缺陷，并在长期电热联合作用下进一步劣化，最终导致故障的发生。鉴于此，以油中氢气含量为主要研究方向，设计并制作了含有不同缺陷套管芯子，并搭建了油纸绝缘套管中氢气生成特性实验平台开展研究。研究结果表明：当纸中含水量较低时，套管油中无明显氢气产生，但在油中水分过饱和致使套管尾部出现积水的情况下，水滴表面电场畸变并发生放电，油中氢气含量呈现出先缓慢后快速的增长趋势；当套管芯子内部存在电容屏褶皱缺陷时，油中氢气含量随电压施加时间近似呈线性增长；相对于以上两种缺陷，当套管存在金属尖端缺陷时，油中氢气生产速率显著增加，并伴有连续微小气泡产生。研究结果为利用氢气传感器开展油纸套管内部缺陷监测提供了数据支撑，提升了变压器油纸套管运维智能化水平。 |
| 中文关键词:油纸套管 氢气 金属尖端 电容屏褶皱 |
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| Hydrogen Generation Characteristics of the Oil Paper Insulated Bushing with Different Inside Defects |
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| Abstract:In recent years， frequent power accidents caused by bushing failures have seriously affected the safe and stable operation of the power grid. There may be internal insulation defects in the transformer bushing during manufacturing， installation and operation， and further deterioration under the combined effect of electrical-thermal interaction for a long time， finally leading to malfunctions. For this reason， this paper takes hydrogen content in the oil as the main research direction， designs and manufactures bushing cores with different defects， and sets up experiment platforms to study hydrogen generation characteristics in the oil-paper insulated bushing. The results of the study show that when the water content in the paper is low， there is no obvious hydrogen generation in the oil. However， the electric field on the surface of water droplets distorts and discharges when the water content in the oil is oversaturated， and the hydrogen content in the oil increases slowly at first and then rapidly. The hydrogen content in the oil increases linearly with the withstand voltage time when there is a capacitance screen folds defect in the bushing core. Compared with the above two defects， hydrogen production rates in the oil are significantly increased when there are metal spikes defects in the bushing， accompanied by continuous microbubbles. The research results of this paper provide data support for the use of hydrogen sensors to carry out internal defect monitoring of the oil-paper bushing， and help to improve the intelligent operation and maintenance of the oil-paper bushing. |
| keywords:oil-paper bushing hydrogen metal spikes capacitive screen folds |
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