| 变压器绝缘纸板微水分测量试验研究 |
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| 引用本文： | 李万全,孙宝元,戴恒震.变压器绝缘纸板微水分测量试验研究[J].大连理工大学学报,2005,45(4):566-569. |
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| 作者姓名： | 李万全 孙宝元 戴恒震 |
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| 作者单位： | 大连理工大学,精密与特种加工教育部重点实验室,辽宁,大连,116024;大连理工大学,精密与特种加工教育部重点实验室,辽宁,大连,116024;大连理工大学,精密与特种加工教育部重点实验室,辽宁,大连,116024 |
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| 基金项目： | 中国输变电行业技术攻关项目 |
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| 摘 要： | 采用介电法与称重法相结合对绝缘纸板在线干燥过程进行了研究.由于绝缘纸板中的微水分影响其介电特性,利用电容传感器测量纸板的对应区域,同时将获得的电信号与称重试验结果进行比较,建立了电信号与被测纸板质量之间的对应关系,并提出一个绝缘纸板干燥过程微水分质量分数指数规律计算公式.研究表明,除湿速率表现为振荡衰减过程,其原因与纸板结构及环境气氛有关.
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| 关 键 词： | 绝缘纸板 微水分 介电 拟合 |
| 文章编号： | 1000-8608（2005）04-0566-04 |
| 收稿时间： | 2004-02-10 |
| 修稿时间： | 2004-02-10 |
Experimental study of moisture measuring in transformer pressboard |
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| LI Wan-quan,SUN Bao-yuan,DAI Heng-zhen.Experimental study of moisture measuring in transformer pressboard[J].Journal of Dalian University of Technology,2005,45(4):566-569. |
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| Authors: | LI Wan-quan SUN Bao-yuan DAI Heng-zhen |
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| Abstract: | The on-line monitoring used in the process of drying of pressboard is discussed by dielectrometry and weight-loss method. According to the moisture influence on dielectric characteristics of pressboard, comparing the signal of capacitance sensor detecting on the touching area with the results of sample weighing, an expression between the signal of capacitance measurement and the weight of the sample is obtained. An exponential decay expression of the bulk moisture concentration of pressboard during drying process is presented. The results of sample weighing show that drying rate is a process of wavy decay. It is determined by the interaction between pressboard and vapour. |
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| Keywords: | pressboard micro-moisture dielectrometry fitting |
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