Analysis of the Thermal Aging Decomposition Characteristics of PC and PET in Oil
Wang Wei1,2,Yang Kai3,Liu Han1,2,Yi Denghui1,2
1.State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 China; 2.Beijing Key Laboratory of High Voltage & EMC North China Electric Power University Beijing 102206 China; 3.State GridMaterials Co.Ltd. Beijing 100120 China
Abstract As an important part of oil-immersed power transformer,the performance of the oil-paper insulation system can directly affect the reliability and the service life of transformers.The insulation paper has both high permittivity and dielectric dissipation.Furthermore,the insulation paper also has unwanted disadvantages,such as low heat proof and low aging resistance.These defects have restricted the development of theoil-immersed transformer towardsthe compact type with high capacity.Two kinds of the polymer materials,i.e.the polycarbonate (PC) and the polyester film (PET),are chosen as the candidates for comparison with the insulation paper.Every materialisaged for 300 days in the transformer oil under different temperatures of 90 ℃,110 ℃,and 130 ℃ respectively.They arethen tested for the resultant in oil,the acid value,the dissolved gases in oil,and the mechanical strength.Combined with the change of their degree of polymerization (DP) and scanning electron microscope (SEM),the aging behaviors of three materialsareanalyzed to find the characteristic quantity to judge the degree of aging.
Wang Wei,Yang Kai,Liu Han等. Analysis of the Thermal Aging Decomposition Characteristics of PC and PET in Oil[J]. Transactions of China Electrotechnical Society, 2016, 31(5): 152-163.
[1] 张镱议,廖瑞金,杨丽君,等.基于云理论的电力变压器绝缘状态评估方法[J].电工技术学报,2012,27(5):13-20. Zhang Yiyi,Liao Ruijin,Yang Lijun,et al.An assessment method for insulation condition of power transformer based upon cloud model[J].Transactions of China Electrotechnical Society,2012,27(5):13-20. [2] Paraskevas C D,Vassiliou P,Dervos C T.Temperature dependent dielectric spectroscopy in frequency domain of high-voltage transformer oils compared to physicochemical results[J].IEEE Transactions on Dielectrics and Electrical Insulation,2006,13(3):539-546. [3] Muthanna K T,Sarkar A ,Das K, et al.Transformer insulation life assessment[J].IEEE Transactions on Power Delivery,2006,21(1):150-156. [4] 杨丽君,廖瑞金,孙会刚,等.变压器油纸绝缘热老化特性及特征量研究[J].电工技术学报,2009,24(8):27-33. Yang Lijun,Liao Ruijin,Sun Huigang,et al.Investigation on Properties and characteristics of oil-paper insulation in transformer during thermal degradation process[J].Transactions of China Electrotechnical Society,2009,24(8):27-33. [5] 周宁,马建伟,胡博,等.基于故障树分析的电力变压器可靠性跟踪方法[J].电力系统保护与控制,2012,40(19):72-77. Zhou Ning,Ma Jianwei,Hu Bo,et al.Reliability tracing technique for power transformers using the fault tree analysis method[J].Power System Protection & Control,2012,40(19):72-77. [6] Pradhan M K,Ramu T S.On the estimation of elapsed life of oil-immersed power transformers[J].IEEE Transactions on Power Delivery,2005,20(3):1962-1969. [7] 廖瑞金,唐超,杨丽君,等.电力变压器用绝缘纸热老化的微观结构及形貌研究[J].中国电机工程学报,2007,27(33):59-64. Liao Ruijin,Tang Chao,Yang Lijun,et al.Research on the microstructure and morphology of power transformer insulation paper after thermal aging[J].Proceedings of the CSEE,2007,27(33):59-64. [8] 朱英浩.变压器用新型绝缘材料[J].变压器,1985(12):2-6. Zhu Yinghao.New insulation material for transformer[J].Transformer,1985(12):2-6. [9] 杨凯,王伟,杜家振,等.PC和PET油中电热老化过程中聚合度和介损特性分析[J].电工技术学报,2014,29(4):282-289. Yang Kai,Wang Wei,Du Jiazhen,et al.Analysis on DP and tanδ characteristics of PC and PET in the electrical-thermal aging process in oil[J].Transactions of China Electrotechnical Society,2014,29(4):282-289. [10]顾小虎.耐高温绝缘结构液浸式变压器的特性[J].电器工业,2005(3):43-44. Gu Xiaohu.Characteristics of heat resistant and insulated-structure oil-immersed transformer[J].China Electrical Equipment Industry,2005(3):43-44. [11]IEEE Std 1276-1998.IEEE Guide for the Application of High-Temperature Insulation Materials in Liquid-Immersed Power Transformers[S]. [12]Fox M,Golner T M.New high temperature insulation for oil-filled transformers[C]//Conference Record of the 1994 IEEE International Symposium on Electrical Insulation,Pittsburgh,PA,1994:567- 569. [13]He Dongxin,Yue Caipeng,Wang Wei.Preliminary study on infrared spectral characteristics of polymer materials in mineral oil impregnated polymer materials under electro-thermal aging[C]//The 2012 IEEE International Symposium on Electrical Insulation,San Juan,PR,2012:189-192. [14]Wang Wei,Yue Caipeng,He Dongxin,et al.A comparative analysis of dielectric properties of oil-paper insulation and polymer materials before and after thermal aging[J].Science China Technological Sciences,2014,57(4):738-746. [15]Wang Wei,Yue Caipeng,Gu Jiefeng,et al.Status assessment of polymeric materials in mineral oil under electro-thermal aging by frequency-domain dielectric spectroscopy[J].IEEE Transactions on Dielectrics and Electrical Insulation,2015,22(2):831-841. [16]变压器绝缘纸板[M].沈阳:辽宁科学技术出版社,1997. [17]林朝晖,张彼德.利用糠醛含量进行变压器寿命预测[J].变压器,2009,46(7):35-38. Lin Zhaohui,Zhang Bide.Forecast of transformer life time with furfural content[J].Transformer,2009,46(7):35-38. [18]杨丽君,廖瑞金,孙才新,等.油纸绝缘老化阶段的多元统计分析[J].中国电机工程学报,2005,25(18):151-156. Yang Lijun,Liao Ruijin,Sun Caixin,et al.Using multivariate statistical method to recognize different aging stages of oil-paper[J].Proceedings of the CSEE,2005,25(18):151-156. [19]孔英会,苑津莎,李新叶,等.基于时序特征和参数估计的变压器故障诊断方法[J].电工技术学报,2008,23(12):48-54. Kong Yinghui,Yuan Jinsha,Li Xinye,et al.A fault diagnosis method for power transformer based on temporal characteristics and parameter estimation[J].Transactions of China Electrotechnical Society,2008,23(12):48-54. [20]王永强,律方成,李和明.基于贝叶斯网络和油中溶解气体分析的变压器故障诊断方法[J].电工技术学报,2004,19(12):74-77. Wang Yongqiang,Lü Fangcheng,Li Heming.Fault diagnosis for power transformer based on BN and DGA[J].Transactions of China Electrotechnical Society,2004,19(12):74-77. [21]李俭,孙才新,陈伟根,等.基于灰色聚类分析的充油电力变压器绝缘故障诊断的研究[J].电工技术学报,2002,17(4):80-83. Li Jian,Sun Caixin,Chen Weigen,et al.Study on fault diagnosis of insulation of oil-immersed transformer based on grey cluster theory[J].Transactions of China Electrotechnical Society,2002,17(4):80-83. [22]何东欣,王伟,顾杰峰,等.PPS和PTFE油中电热老化过程中的红外光谱特性[J].电工技术学报,2013,28(8):26-33. He Dongxin,Wang Wei,Gu Jiefeng,et al.Infrared spectral characteristics of PPS and PTFE in the electrical-thermal aging process in oil[J].Transactions of China Electrotechnical Society,2013,28(8):26-33. [23]廖瑞金,刘刚,李爱华,等.不同油纸复合绝缘老化时生成CO、CO2的规律[J].高电压技术,2009,35(4):755-760. Liao Ruijin,Liu Gang,Li Aihua,et al.Regularities of content of CO and CO2 in different oil-paper insulation compositions under accelerated thermal aging test[J].High Voltage Engineering,2009,35(4):755-760. [24]廖瑞金,杨丽君,郑含博,等.电力变压器油纸绝缘热老化研究综述[J].电工技术学报,2012,27(5):1-12. Liao Ruijin,Yang Lijun,Zheng Hanbo,et al.Reviews on oil-paper insulation thermal aging in power transformers[J].Transactions of China Electrotechnical Society,2012,27(5):1-12. [25]屠幼萍,孙伟忠,岳彩鹏,等.固体绝缘材料热老化电气特性的研究[J].电工技术学报,2013,28(1):7-13. Tu Youping,Sun Weizhong,Yue Caipeng,et al.Research on thermal aging electrical properties of polymer materials[J].Transactions of China Electrotechnical Society,2013,28(1):7-13.
2016, Vol. 31 
