基于中红外光谱分析热老化对变压器油性能影响
|
摘要
以500k V的在用变压器油作为研究对象,在实验室中用150℃加热老化试验,探讨了热老化对变压器油的氧化性能和电气性能的影响。运用中红外光谱对不同老化时间样品进行扫描得到红外光谱,同时测试了变压器油中T501、酸值、介电损耗常数、击穿电压和碳族组成。试验结果表明:变压器油在3 650 cm-1处酚类抗氧化剂的伸缩振动吸收峰强度随着老化时间明显降低,并以此特征吸收峰建立了T501红外光谱定量检测的标准曲线,相关系数为0.999 964;变压器油深度老化后在1 700 cm-1处出现C=O伸缩振动吸收峰,此时酸值明显增加,T501仅剩0.01%,变压器油的氧化安定性迅速下降。变压器油老化过程中,介电损耗常数随着老化时间的增大而增大,击穿电压随着老化时间增加而降低。通过对变压器油的中红外光谱分析,探讨了绝缘油老化过程和机理,发现热老化对变压器油的抗氧化性和绝缘性能有很大的影响。。
The 500 kV transformer oil was used as the research objects, and thermal aging test at 150℃ was carried out in laboratory, the effect of thermal aging on oxidation properties and electrical properties of insulating oil was investigated. The infrared spectrums of samples with different aging time were obtained by FT-IR., Meanwhile,T501,acid number, dielectric loss constant, breakdown voltage and carbon group composition of transformer oil were tested. The results showed that: the intensity of stretching vibration absorption peak of insulating oil's phenolic antioxidants at 3 650 cm-1 decreased significantly with aging time, based on the characteristic absorption peak, the standard curve of T501 infrared spectrum quantitative detection was established, and the correlation coefficient was0.999 964. After aging deeply, C=O absorption peak appeared at 1 700 cm-1,at this point, the acid number increased significantly,only 0.01% T501 remained in transformer oil,the oxidation stability of oil decreased. In the aging process, the dielectric loss constant increased with the aging time, and the breakdown voltage decreased with the aging time. The aging process and mechanism of insulating oil were analyzed by FT-IR. It's found that thermal aging had a great influence on the oxidation and electrical performances of the insulating oil..
The 500 kV transformer oil was used as the research objects, and thermal aging test at 150℃ was carried out in laboratory, the effect of thermal aging on oxidation properties and electrical properties of insulating oil was investigated. The infrared spectrums of samples with different aging time were obtained by FT-IR., Meanwhile,T501,acid number, dielectric loss constant, breakdown voltage and carbon group composition of transformer oil were tested. The results showed that: the intensity of stretching vibration absorption peak of insulating oil's phenolic antioxidants at 3 650 cm-1 decreased significantly with aging time, based on the characteristic absorption peak, the standard curve of T501 infrared spectrum quantitative detection was established, and the correlation coefficient was0.999 964. After aging deeply, C=O absorption peak appeared at 1 700 cm-1,at this point, the acid number increased significantly,only 0.01% T501 remained in transformer oil,the oxidation stability of oil decreased. In the aging process, the dielectric loss constant increased with the aging time, and the breakdown voltage decreased with the aging time. The aging process and mechanism of insulating oil were analyzed by FT-IR. It's found that thermal aging had a great influence on the oxidation and electrical performances of the insulating oil..
引文
[1]陈彬,韩超,刘阁.铜颗粒污染物对变压器油运动黏度的影响[J].北京航空航天大学学报,2016,42(10):2031-2037.
[2]杜琳娟,毒珂,曹宏伟,田娱嘉.废变压器油中氧化成分检测方法研究[J].化学研究与应用,2016,28(4):558-563.
[3]徐君,韩敏,张贤明,张慧.绝缘油击穿电压试验的研究[J].变压器,2008,45(3):59-62.
[4]梁俊,成崇远,史永刚,龚海峰,杨靖.变压器油酸值与击穿电压相关性研究[J].重庆科技学院学报(自然科学版),2006,8(2):29-32.
[5]窦鹏,杨道武,李景禄,汪红梅,马丽.变压器油的酸值与介质损耗因素相关性研究[J].变压器,2008,45(7):47-50..
[6]钱艺华,吴海燕,苏伟,黄溢彬,钟振声.不同变压器油电气性能对比研究[J].变压器,2012,49(4):29-33..
[7]王娟,杜修明,唐金伟,刘晓莹,朱孟兆,冯丽萍.变压器油界面张力试验分析及其超标处理[J].热力发电,2016,45(4):116-120.
[8]张丽,朱志平,王灯,钱艺华,苏伟.变压器油、汽轮机油中苯酚类抗氧化剂的定量检测方法研究[J].绝缘材料,2017,50(5):67-79.
[9]王世强,张冠军,胡海燕,肖睿,刘全桢.油老化对变压器油纸绝缘频域介电谱的影响[J].绝缘材料,2015,48(10):40-44.
[10]吴海燕.用旋转氧弹法老化后的变压器油性能分析[J].合成润滑材料,2015,42(2):10-13.
[11]王献敏,马勇飞,窦鹏.变压器油老化对介质的影响及其绝缘寿命的研究[J].变压器,2011,48(4):41-45.
[12] DL/T 929-2005.矿物绝缘油、润滑油结构族组成的红外光谱测定法[S].
[13]薛卫国,杨蕾,伏喜胜,周旭光.润滑油抗氧剂的作用机理[J].合成润滑材料,2015, 42(2):40-46.
[14]王丽娟,刘维民.润滑油抗氧剂的作用机理[J].润滑油,1998,13(2):55-58.
[15]费逸伟,郭峰,饶婷,杨宏伟,郭青鹏.聚a-烯烃航空润滑油基础油黏度衰变机理分析[J].当代化工,2015,44(6):1272-1275.
[16] ASTM D2668-07(2013). Standard Test Method for 2,6-di-tertButyl-p-Cresol and 2,6-di-tert-Butyl Phenol in Electrical Insulating Oil by Infrared Absorption[S].
[17]ASTM D664-17. Standard Test Method for Acid Number of Petroleum Products by Potentiometric Titration[S].
[18] IEC 60247-2004. Insulating liquids Measurement of relative permittivity, dielectric dissipation factor(tanδ)and d.c. resistivity[S].
[19]ASTM D877M-13. Standard Test Method for Dielectric Breakdown Voltage of Insulating Liquids Using Disk Electrodes[S].
[2]杜琳娟,毒珂,曹宏伟,田娱嘉.废变压器油中氧化成分检测方法研究[J].化学研究与应用,2016,28(4):558-563.
[3]徐君,韩敏,张贤明,张慧.绝缘油击穿电压试验的研究[J].变压器,2008,45(3):59-62.
[4]梁俊,成崇远,史永刚,龚海峰,杨靖.变压器油酸值与击穿电压相关性研究[J].重庆科技学院学报(自然科学版),2006,8(2):29-32.
[5]窦鹏,杨道武,李景禄,汪红梅,马丽.变压器油的酸值与介质损耗因素相关性研究[J].变压器,2008,45(7):47-50..
[6]钱艺华,吴海燕,苏伟,黄溢彬,钟振声.不同变压器油电气性能对比研究[J].变压器,2012,49(4):29-33..
[7]王娟,杜修明,唐金伟,刘晓莹,朱孟兆,冯丽萍.变压器油界面张力试验分析及其超标处理[J].热力发电,2016,45(4):116-120.
[8]张丽,朱志平,王灯,钱艺华,苏伟.变压器油、汽轮机油中苯酚类抗氧化剂的定量检测方法研究[J].绝缘材料,2017,50(5):67-79.
[9]王世强,张冠军,胡海燕,肖睿,刘全桢.油老化对变压器油纸绝缘频域介电谱的影响[J].绝缘材料,2015,48(10):40-44.
[10]吴海燕.用旋转氧弹法老化后的变压器油性能分析[J].合成润滑材料,2015,42(2):10-13.
[11]王献敏,马勇飞,窦鹏.变压器油老化对介质的影响及其绝缘寿命的研究[J].变压器,2011,48(4):41-45.
[12] DL/T 929-2005.矿物绝缘油、润滑油结构族组成的红外光谱测定法[S].
[13]薛卫国,杨蕾,伏喜胜,周旭光.润滑油抗氧剂的作用机理[J].合成润滑材料,2015, 42(2):40-46.
[14]王丽娟,刘维民.润滑油抗氧剂的作用机理[J].润滑油,1998,13(2):55-58.
[15]费逸伟,郭峰,饶婷,杨宏伟,郭青鹏.聚a-烯烃航空润滑油基础油黏度衰变机理分析[J].当代化工,2015,44(6):1272-1275.
[16] ASTM D2668-07(2013). Standard Test Method for 2,6-di-tertButyl-p-Cresol and 2,6-di-tert-Butyl Phenol in Electrical Insulating Oil by Infrared Absorption[S].
[17]ASTM D664-17. Standard Test Method for Acid Number of Petroleum Products by Potentiometric Titration[S].
[18] IEC 60247-2004. Insulating liquids Measurement of relative permittivity, dielectric dissipation factor(tanδ)and d.c. resistivity[S].
[19]ASTM D877M-13. Standard Test Method for Dielectric Breakdown Voltage of Insulating Liquids Using Disk Electrodes[S].