基于Teflon AF/陶瓷复合膜和电化学传感器的变压器油中溶解气体的在线监测系统
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摘要
设计并制成了测定变压器油中3种故障气体(氢气、一氧化碳和乙烯)的在线监测系统。采用Teflon AF/陶瓷复合膜作为油气分离的组件;采用RAE Systems的氢气电化学传感器、一氧化碳电化学传感器和乙烯电化学传感器。试验表明,采用上述复合膜组件可以在4h内实现油气平衡。为克服温度变化对电化学传感器响应信号的影响,采用温度控制模块使测定单元处于30℃的恒温环境中,保持恒温条件不仅使电化学传感器响应信号不受干扰,而且可延长电化学传感器的使用寿命。气体组分之间的交叉干扰采用信号矩阵算法予以解决,运用所提出的监测系统,上述3种气体的相对测定误差均在15%以内,测定值的相对标准偏差(n=5)为7.3%(氢气),3.9%(一氧化碳),2.1%(乙烯)。
An on-line monitoring system for 3 trouble gases(H_2,CO and C_2H_4) in transformer oil was designed and fabricated.Teflon AF/ceramic composite membrane was used in the system as a module for separation of the gases from oil,and electrochemical sensors of the RAE systems for H_2,CO and C_2H_4 were used.It was shown that the equilibrium between oil and gas was attained within 4 h by using the composite membrane.A constant temperature enviroment at 30℃ was maintained in determination units by using a thermostat,to eliminate the interference of temperature fluctuations to the response signals of the electrochemical sensors.The temperature control not only could keep the response signals of the electrochemical sensors away from the interference,but also keep longer service life of the electrochemical sensors.The problem of cross-interference between the gases was solved by the matrix calculation of the signal values.As shown by the results given by the monitoring system,the relative errors of determined results of the 3 gases were kept within 15%,and values of RSDs(n=5) found were 7.3% for H_2,3.9% for CO and 2.1% for C_2H_4.
An on-line monitoring system for 3 trouble gases(H_2,CO and C_2H_4) in transformer oil was designed and fabricated.Teflon AF/ceramic composite membrane was used in the system as a module for separation of the gases from oil,and electrochemical sensors of the RAE systems for H_2,CO and C_2H_4 were used.It was shown that the equilibrium between oil and gas was attained within 4 h by using the composite membrane.A constant temperature enviroment at 30℃ was maintained in determination units by using a thermostat,to eliminate the interference of temperature fluctuations to the response signals of the electrochemical sensors.The temperature control not only could keep the response signals of the electrochemical sensors away from the interference,but also keep longer service life of the electrochemical sensors.The problem of cross-interference between the gases was solved by the matrix calculation of the signal values.As shown by the results given by the monitoring system,the relative errors of determined results of the 3 gases were kept within 15%,and values of RSDs(n=5) found were 7.3% for H_2,3.9% for CO and 2.1% for C_2H_4.
引文
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[3]张深波,刘晓峰,章连众,等.变压器油中溶解气体在线监测综述[J].化工时刊,2011,25(7):52-55.
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[9]李洋流,赵学增,郭春志,等.基于膜分离的变压器在线监测系统中气体体积分数的预测算法[J].电力自动化设备,2010,30(12):36-41.
[10]禚莉,谢奇峰,韩毓旺.陶瓷-Teflon AF2400复合膜组件油气分离特性研究[J].膜科学与技术,2012,32(5):107-111.
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[12] GB/T 7252-2001变压器油中溶解气体分析和判断导则[S].
[13]周艺环,叶日新,董明,等.基于电化学传感器的SF6分解气体检测技术研究[J].仪器仪表学报,2016,37(9):2133-2139.
[14]陆天虹.第十一届全国电分析化学会议论文集[C].聊城:中国化学会、国家自然科学基金委员会、中国仪器仪表学会,2011.
[15]杨道华,谭秋林,熊继军,等.SF6纯度与分解产物检测仪[J].仪表技术与传感器,2015(2):36-38.
[16]张正勇,徐定钧,于震.金属氧化物气体传感器检测混合气体组分浓度的线性方法与原理[J].传感技术学报,2009,22(2):179-182.
[17] Q/GDW 540.2-2010变电设备在线监测装置检验规范第2部分:变压器油中溶解气体在线监测装置[S].
[18]徐湘忆,陈璐,熊鸣翔,等.变压器油中溶解气体在线监测装置准确性分析[J].电力与能源,2016,37(3):295-300.
[2] SINGH S,BANDYOPADHYAY M N.Dissolved gas analysis technique for incipient fault diagnosis in power transformers:A bibliographic survey[J].IEEE Electrical Insulation Magazine,2010,26(6):41-46.
[3]张深波,刘晓峰,章连众,等.变压器油中溶解气体在线监测综述[J].化工时刊,2011,25(7):52-55.
[4]张晓佳.HYDRAN 201R在线式变压器早期故障监测仪应用[J].江苏电器,2000(3):32-34.
[5] INOUE Y,SUGANUMA K,KAMBA M,et al.Development of oil-dissolved hydrogen gas detector for diagnosis of transformers[J].IEEE Transactions on Power Delivery,1990,5(1):226-232.
[6]周利军,吴广宁,盛进路,等.基于DGA技术的牵引变压器在线监测系统[J].铁道学报,2005,27(5):41-44.
[7]杨启平,薛五德,蓝之达.变压器油中溶解气体在线监测技术的研究[J].变压器,2005,42(3):39-43.
[8]赵莉.燃料电池型变压器油中气体在线监测仪[J].电世界,2014,55(7):8-8.
[9]李洋流,赵学增,郭春志,等.基于膜分离的变压器在线监测系统中气体体积分数的预测算法[J].电力自动化设备,2010,30(12):36-41.
[10]禚莉,谢奇峰,韩毓旺.陶瓷-Teflon AF2400复合膜组件油气分离特性研究[J].膜科学与技术,2012,32(5):107-111.
[11] HAN Y W,DING F,HAO C X,et al.The oil-gas separation characteristics of ceramic/Teflon AF2400composite membrane[J].Separation and Purification Technology,2012,88:19-23.
[12] GB/T 7252-2001变压器油中溶解气体分析和判断导则[S].
[13]周艺环,叶日新,董明,等.基于电化学传感器的SF6分解气体检测技术研究[J].仪器仪表学报,2016,37(9):2133-2139.
[14]陆天虹.第十一届全国电分析化学会议论文集[C].聊城:中国化学会、国家自然科学基金委员会、中国仪器仪表学会,2011.
[15]杨道华,谭秋林,熊继军,等.SF6纯度与分解产物检测仪[J].仪表技术与传感器,2015(2):36-38.
[16]张正勇,徐定钧,于震.金属氧化物气体传感器检测混合气体组分浓度的线性方法与原理[J].传感技术学报,2009,22(2):179-182.
[17] Q/GDW 540.2-2010变电设备在线监测装置检验规范第2部分:变压器油中溶解气体在线监测装置[S].
[18]徐湘忆,陈璐,熊鸣翔,等.变压器油中溶解气体在线监测装置准确性分析[J].电力与能源,2016,37(3):295-300.