电力变压器用天然酯绝缘油中特征气体溶解特性
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摘要
为了探索适用于天然酯绝缘油的油中溶解气体分析方法(DGA),需要研究特征气体在天然酯绝缘油中的溶解特性。以FR3~?绝缘油、精炼大豆绝缘油和甲酯化菜籽绝缘油等天然酯绝缘油为研究对象,以25号矿物绝缘油为参照,测定了温度为30~70℃时H_2、CO、CO_2、CH_4、C_2H_4、C_2H_6、C_2H_2等7种故障诊断特征气体在4种绝缘油中的Ostwald平衡常数(K)。通过对K和温度(θ)的拟合,得到7种特征气体在4种绝缘油中的28组K-θ模型方程,该方程可以推算其他温度下任意特征气体在绝缘油中的K。通过各特征气体在同一种绝缘油中K-θ变化曲线对比发现:4种绝缘油中烃类气体的溶解度大小顺序为:K(C_2H_6)>K(C_2H_4)≈K(C_2H_2)>K(CH_4);非烃类气体溶解度大小顺序为:K(CO_2)>K(CO)>K(H_2)。
In order to explore suitable dissolved gas analysis(DGA) method for natural ester insulating oil, the dissolution properties of characteristic gases in nature ester insulating oils need to be studied. So dissolution properties of characteristic gases in 3 kinds of nature ester insulating oils(including FR3~? nature ester, Refined soybean insulating oil, and Methyl rapeseed insulating oil)were studied with a kind of mineral insulating oil as a reference. The Ostwald equilibrium constants(K) of seven kinds of fault diagnosis characteristic gases(including H_2, CO, CO_2, CH_4, C_2H_4, C2H6, and C_2H_2) in the four kinds of insulating oil were measured at various temperatures(θ) between 30 ℃ to 70 ℃. Through the Ostwald equilibrium constant(K) and temperature(θ) matching, 28 groups of K-θ model equation of the seven characteristic gases in the four kinds of insulating oil were established, and the other K could be calculated according to temperature of some characteristic gas in some kind of insulating oil. Through comparison of the characteristic gases K-θ curve in the same kind of insulating oil, hydrocarbon gases solubility in four kinds of insulating oil in size order can be found as follows: K(C_2H_6)>K(C_2H_4)≈K(C_2H_2)>K(CH_4), non hydrocarbon gases solubility in size order as follows: K(CO_2)>K(CO)>K(H_2).
In order to explore suitable dissolved gas analysis(DGA) method for natural ester insulating oil, the dissolution properties of characteristic gases in nature ester insulating oils need to be studied. So dissolution properties of characteristic gases in 3 kinds of nature ester insulating oils(including FR3~? nature ester, Refined soybean insulating oil, and Methyl rapeseed insulating oil)were studied with a kind of mineral insulating oil as a reference. The Ostwald equilibrium constants(K) of seven kinds of fault diagnosis characteristic gases(including H_2, CO, CO_2, CH_4, C_2H_4, C2H6, and C_2H_2) in the four kinds of insulating oil were measured at various temperatures(θ) between 30 ℃ to 70 ℃. Through the Ostwald equilibrium constant(K) and temperature(θ) matching, 28 groups of K-θ model equation of the seven characteristic gases in the four kinds of insulating oil were established, and the other K could be calculated according to temperature of some characteristic gas in some kind of insulating oil. Through comparison of the characteristic gases K-θ curve in the same kind of insulating oil, hydrocarbon gases solubility in four kinds of insulating oil in size order can be found as follows: K(C_2H_6)>K(C_2H_4)≈K(C_2H_2)>K(CH_4), non hydrocarbon gases solubility in size order as follows: K(CO_2)>K(CO)>K(H_2).
引文
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[14]王伟,乔大雁,汪鑫,等.基于油中溶解气体分析的油纸交界面爬电诊断[J].高电压技术,2014,40(2):513-518.WANG Wei,QIAO Dayan,WANG Xin,et al.Diagnosis of creepage discharge on oil pressboard interface based on dissolved gases analysis[J].High Voltage Engineering,2014,40(2):513-518.
[15]仲元昌,万能飞,夏艳,等.基于油气参数分析的电力变压器故障分步式诊断算法[J].高电压技术,2014,40(8):2279-2284.ZHONG Yuanchang,WAN Nengfei,XIA Yan,et al.Distributed diagnosis algorithm for transformer fault by dissolved gas-in-oil parameters analysis[J].High Voltage Engineering,2014,40(8):2279-2284.
[16]张绮,王会娟,郭春梅,等.电气绝缘油热膨胀系数的研究[J].石油炼制与化工,2012,43(10):55-59.ZHANG Qi,WANG Huijuan,GUO Chunmei,et al.Research on thermal expansion coefficient of electrical insulating oil[J].Petroleum Processing and Petrochemicals,2012,43(10):55-59.
[17]PIEROTTI R A.The solubility of gases in liquids[J].Journal of Physical Chemistry,1993,67(9):1840-1844.
[18]付晓泰,王振平.气体在水中的溶解机理及溶解度方程[J].中国科学(B辑),1996,26(2):124-130.FU Xiaotai,WANG Zhenping.The mechanism of dissolution and solubility equation of gas in water[J].China Science(B),1996,26(2):124-130.
[19]李剑,姚舒翰,杜斌,等.植物绝缘油及其应用研究关键问题分析与展望[J].高电压技术,2015,41(2):353-363.LI Jian,YAO Shuhan,DU Bin,et al.Analysis to principle problems and future prospect of research on vegetable insulating oils and their applicaions[J].High Voltage Engineering,2015,41(2):353-363.
[2]FROTSCHER R,VUKOVIC D,JOVALEKIC M.Understanding the ageing aspects of natural ester based insulation liquid in power transformer[J].IEEE Transactions on Dielectrics and Electrical Insulation,2016,23(1):246-257.
[3]JOVALEKIC M,VUKOVIC D,TENBOHLEN S.Gassing behavior of various alternative insulating liquids under thermal and electrical stress[C]∥2012 IEEE International Symposium on Electrical Insulation.San Juan,USA:IEEE:490-493.
[4]BANDARA K,EKANAYAKE C,SAHA T K.Comparative study for understanding the behaviour of natural ester with mineral oil as a transformer insulating liquid[C]∥2014 IEEE Conference on Electrical Insulation and Dielectric Phenomena(CEIDP).Des Moines,IA,USA:IEEE:792-795.
[5]周利军,李先浪,王东阳,等.基于Havriliak–Negami介电弛豫模型的油纸绝缘状态评估[J].高电压技术,2016,42(1):153-162.ZHOU Lijun,LI Xianlang,WANG Dongyang,et al.Status assessment of oil-paper insulation based on havriliak–negami dielectric relaxation model[J].High Voltage Engineering,2016,42(1):153-162.
[6]张珂斐,郭江,聂德鑫,等.基于化学反应优化神经网络与融合DGA算法的油浸式变压器模型研究[J].高电压技术,2016,42(4):1275-1281.ZHANG Kefei,GUO Jiang,NIE Dexin,et al.Diagnosis model for transformer fault based on cro-bp neural network and fusion DGA method[J].High Voltage Engineering,2016,42(4):1275-1281.
[7]吴广宁,宋臻杰,杨飞豹,等.基于时域介电谱和去极化电量的变压器油纸绝缘老化特征量研究[J].高电压技术,2017,43(1):195-202.WU Guangning,SONG Zhenjie,YANG Feibao,et al.Study on aging characteristics of transformer oil-paper insulation based on the time domain dielectric spectroscopy and depolarization charge quantity[J].High Voltage Engineering,2017,43(1):195-202.
[8]PERRIER C,MARUGAN M,BEROUAL A.DGA comparison between ester and mineral oils[J].IEEE Transactions on Dielectrics and Electrical Insulation,2012,19(5):1609-1614.
[9]TENBOHLEN S,VUKOVIC D,JOVALEKIC M.Dielectric performance and dissolved gas analysis of natural esters for application in power transformers[C]∥CIGRE SC D1 Colloquium.Budapest,Hungary:CIGRE,2009:39-43.
[10]KHAN I U,WANG Z D,COTTON I.Dissolved gas analysis of alternative fluids for power transformers[J].IEEE Electrical Insulation Magazine,2007,23(5):5-14.
[11]WANG Z D,YIN X,HUANG J P,et al.Fault gas generation in natural-ester fluid under localized thermal faults[J].IEEE Electrical Insulation Magazine,2012,28(6):45-56.
[12]BANDARA K,EKANAYAKE C,SAHA T K.Compare the performance of natural ester with synthetic ester as transformer insulating oil[C]∥2015 IEEE 11th International Conference on the Properties and Applications of Dielectric Materials(ICPADM).Sydney,NSW,Australia:IEEE,2015:975-978.
[13]蔡胜伟,胡远翔,陈江波,等.天然酯绝缘油加速热老化时油中溶解气体研究[J].绝缘材料,2015,48(4):30-39.CAI Shengwei,HU Yuanxiang,CHEN Jiangbo,et al.Study on dissolved gas in natural ester insulating oil during accelerated thermal ageing[J].Insulating Materials,2015,48(4):30-39.
[14]王伟,乔大雁,汪鑫,等.基于油中溶解气体分析的油纸交界面爬电诊断[J].高电压技术,2014,40(2):513-518.WANG Wei,QIAO Dayan,WANG Xin,et al.Diagnosis of creepage discharge on oil pressboard interface based on dissolved gases analysis[J].High Voltage Engineering,2014,40(2):513-518.
[15]仲元昌,万能飞,夏艳,等.基于油气参数分析的电力变压器故障分步式诊断算法[J].高电压技术,2014,40(8):2279-2284.ZHONG Yuanchang,WAN Nengfei,XIA Yan,et al.Distributed diagnosis algorithm for transformer fault by dissolved gas-in-oil parameters analysis[J].High Voltage Engineering,2014,40(8):2279-2284.
[16]张绮,王会娟,郭春梅,等.电气绝缘油热膨胀系数的研究[J].石油炼制与化工,2012,43(10):55-59.ZHANG Qi,WANG Huijuan,GUO Chunmei,et al.Research on thermal expansion coefficient of electrical insulating oil[J].Petroleum Processing and Petrochemicals,2012,43(10):55-59.
[17]PIEROTTI R A.The solubility of gases in liquids[J].Journal of Physical Chemistry,1993,67(9):1840-1844.
[18]付晓泰,王振平.气体在水中的溶解机理及溶解度方程[J].中国科学(B辑),1996,26(2):124-130.FU Xiaotai,WANG Zhenping.The mechanism of dissolution and solubility equation of gas in water[J].China Science(B),1996,26(2):124-130.
[19]李剑,姚舒翰,杜斌,等.植物绝缘油及其应用研究关键问题分析与展望[J].高电压技术,2015,41(2):353-363.LI Jian,YAO Shuhan,DU Bin,et al.Analysis to principle problems and future prospect of research on vegetable insulating oils and their applicaions[J].High Voltage Engineering,2015,41(2):353-363.