共查询到19条相似文献,搜索用时 140 毫秒
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用旋转氧弹法加速了变压器油的老化。动态地测定了老化后的加氢变压器油和环烷基变压器油的碳族组成,T501含量和界面张力的变化,发现加氢变压器油的抗氧化性能优于环烷基变压器油。 相似文献
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文章介绍了国内外现行的变压器油标准(如IEC标准、ASTM标准、GB 2536标准)和国内外知名品牌(Nynas、Shell、昆仑)变压器油产品现状,并对国内市场上的国际知名品牌(Nynas、Shell、昆仑)变压器油性质进行了对比分析。从国际变压器油标准对比情况看,IEC 60296和ASTM D3487是国际上最通用的标准,大部分国家标准都是在此基础上修改采用的。国内外知名品牌(Nynas、Shell、昆仑)变压器油性质对比分析表明:变压器油仍以环烷基变压器油为主,除了要具有优良的电气性能、低温性能及环保性等,更为重视变压器油运行安全性,保证产品不含腐蚀性硫化物、不存在潜在腐蚀性硫,同时要具有优良的抗氧化性能。 相似文献
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通过对石蜡基和环烷基变压器油在烃类组成、理化性能、电气性能及抗氧化安定性等方面的比较,指出两种变压器油的电气性能相当,在其它性能上各有优缺点。 相似文献
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击穿电压表征变压器油的绝缘性能,是变压器油重要的电气性能。介绍了试验方法、电极形状、温度和操作过程对击变压器穿电压测定值的影响。球形电极的击穿电压值较高,球盖形电极居中,平板电极较低。 相似文献
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20号变压器油是中国石油克拉玛依石化公司环烷基产品的典型代表,主要应用于变压器及其配套设备中作为绝缘和冷却介质以及变压器运行监测载体。采用适宜的生产工艺,生产的产品性质满足GB2536—2011和Q/SY 58—2011的20号通用变压器油标准,经过电力系统多年来的试验研究和实际运行经验证明,20号变压器油质量稳定可靠,具有优异的抗氧化安定性、热安定性、抗老化安定性和低温性能。作为配套绝缘油成功应用于我国首条1000kV特高压试验示范工程,自投运后已安全运行1000多天,用实践检验了变压器油的质量水平。 相似文献
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考察了不同饱和烃对变压器油电气性能、抗氧化性能、溶解性能、抗析气性能和热物性的影响。结果表明,不同饱和烃的电气性能、热物性、抗析气性能、抗氧化性能及对抗氧剂的感受性相当,但环烷烃具有优异的溶解性能,是变压器油的理想组分。 相似文献
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F. A. Al-Amrousi A. Y. El-Naggar R. I. Abdallah 《Petroleum Science and Technology》2007,25(4):453-470
Oxidative cracking of bitumen, waxy fuel oil, and used transformer oils were carried out individually in an autoclave with 0.6 wt% of hydroquinone as a catalyst. The cracking process is conducted at 410°C in an atmosphere of oxygen gas of 0.15 MPa, for 30 min. The identification and quantitative determination of both the liquids and gases obtained during the cracking process are achieved using packed and capillary gas chromatography (GC) connected with suitable detectors. It was found that the degraded liquid products obtained have a higher percentage of lower hydrocarbons compared to the original feed stocks. Several analytical parameters including API gravity, calorific value, viscosity, density, pour point, etc., were used to evaluate the liquid product obtained. Also, the calorific values of the liberated gases were calculated and compared with that of natural gas. The cracked oil products were distilled and compared to their corresponding petroleum fractions. The cracked fractions have the same characteristics as their corresponding petroleum fractions with the exception of some properties that depend on the aromatic, naphthenic, and waxy nature of the virgin oil. 相似文献
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F. A. Al-Amrousi A. Y. El-Naggar R. I. Abdallah 《Petroleum Science and Technology》2013,31(4):453-470
Abstract Oxidative cracking of bitumen, waxy fuel oil, and used transformer oils were carried out individually in an autoclave with 0.6 wt% of hydroquinone as a catalyst. The cracking process is conducted at 410°C in an atmosphere of oxygen gas of 0.15 MPa, for 30 min. The identification and quantitative determination of both the liquids and gases obtained during the cracking process are achieved using packed and capillary gas chromatography (GC) connected with suitable detectors. It was found that the degraded liquid products obtained have a higher percentage of lower hydrocarbons compared to the original feed stocks. Several analytical parameters including API gravity, calorific value, viscosity, density, pour point, etc., were used to evaluate the liquid product obtained. Also, the calorific values of the liberated gases were calculated and compared with that of natural gas. The cracked oil products were distilled and compared to their corresponding petroleum fractions. The cracked fractions have the same characteristics as their corresponding petroleum fractions with the exception of some properties that depend on the aromatic, naphthenic, and waxy nature of the virgin oil. 相似文献