Quantitative analysis of furanic compounds in transformer. Table ii furan content in transformer oil ppb aug 06 jan 08 feb 08 apr 08 5 hydroxymethyl2. The transformer insulation system, primarily consisting of mineral oil, paper and other cellulosic materials, has a finite life, even under ideal operating conditions. Much in the same way that a doctor can analyze a patients blood to determine certain health problems, the trained transformer owner can detect problems within the.
Degradation of cellulosic insulation in power transformers. Performance of natural ester as a transformer oil in moisturerich environments. Quantitative analysis of furanic compounds in transformer oil. Astm d5837 15 standard test method for furanic compounds. Furan analysis when a cellulose molecule depolymerises breaks into smaller lengths or ring structures, a chemical compound known as a furan is formed. Nair published on 20180326 download full article with reference data and citations. Furan analysis of transformer oil transformer phases of. Analysis of paper insulation for its dp value requires removal of a few strips of paper. Dissolved gas analysis guide for transformers filled with. Numerous studies have been carried out to investigate transformer. Nair published on 20180326 download full article with reference data and. Transformer oil or insulating oil is an oil that is stable at high temperatures and has excellent electrical insulating properties. Furan indicates the compounds of carbon and hydrogen. Routine testing of transformer oils and insulating oils on a regular schedule is an accepted industry.
Five furanic compounds were quantified by hplc analysis after the. Formation of furan products in insulating oil, in iee proceedings science. Transformer oil is not only subject to its own degradation, but is also a carrier of gasses emanated during arcing or flashovers between paper and winding insulations. The furan content details are tabulated in table ii. Testing for furanic compounds may be used to complement dissolved gas in oil analysis as performed in accordance with test method d3612. Furanic compounds in electrical insulating liquids yongrun. Since the furan analysis offers an easy and noninvasive way to get valuable information about the condition of solid insulation material in a transformer, several research projects have been carried out in. Furan analysis of transformer oil on233w8e9yl0 idocpub. Oil testing capabilities doble engineering company. According to chris adsett, techenomics general manager, like all preventative maintenance tools regular furan analysis can help prevent major damage or failure of a transformer before it occurs and shows when to rewind or retire a transformer. Residual life assessment with dga, furan content in transformer oil. Transformer oil introduction from wikipedia transformer oil or insulating oil is usually a highlyrefined mineral oil that is stable at high temperatures and has excellent electrical insulating properties. University eee department scope analysis the 2furtural and related furan compounds during cellulosic insulation in mineral insulating oil samples.
New oil spiked with 1,000 mg ml of each of five furan compounds. An alternative method is to estimate the dp from the oil furan concentration 2. Product information dissolved gas analysis and supervision. All the transformers have been in service for more than 40 years. Kr101231586b1 simple test method for furan in aged.
Analysis of less volatile furan related compounds requires a second technique involving liquid or solidphase extraction followed by highperformance liquid chromatography 4,5. Transformer oil purchase specifications developed under the auspices of the doble oil committee march, 2017. Production of transformer oil transformer oil is hydrocarbon product, mainly oil contains napthanic, parrafinic and aromatics. Product information dissolved gas analysis and supervision of. The above standard testing is offered in specific diagnostic suites designed to provide the maximum condition information on the transformers. Specific transformer oil test method availability will vary depending upon location. Power transformer insulation assessment based on oil. To improve the efficiency of prediction and drawbacks, we proposed a new methodology to predict furan content from different critical transformer oil parameters by use of artificial linear layer neural networks. This is usually done in transformers aging above 15 years. Furan measurement in transformer oil by uvvis spectroscopy using fuzzy logic approach front matter i synopsis an ultraviolet to visible uvvis spectroscopic analysis based on fuzzy logic approach has been developed for furan content measurement in transformer oil.
Product information dissolved gas analysis and supervision of oil condition in transformers and reactors transformers diagnostic services at abb performs dissolved gas analysis and supervision of oil. Using the frequency response analysis fra in transformers internal fault detection jalal abdallah. There was no significant increase in any of the gases that would typically confirm a problem. Transformer oil analysis preventative maintenance program. The same can be said for transformer oils used to insulate many transformers. Furan analysis of transformer oil transformer phases of matter. A conventional faulty oilimmersed transformer 400 v 10 kv, 100 kva was diagnosed. What is the importance of furan analysis on transformer oil. Volume 450, issues 12, 21 december 2001, pages 253261. Hence, transformer oil and paper insulation are essential sources to detect incipient and fast developing. Assessing remnant life of transformer based on furan content. The proposed model has been tested on inservice power transformers and prediction accuracy of 90% for furan content in transformer oil has been achieved. The standard test suites are designed for individual samples to deliver a routine set of oil analysis at low. Whenever a transformer undergoes abnormal thermal and electrical stresses, certain gases.
The advantage of furan assessment, is that the it does not produce by oil. Pulsed amperometric detection of furan compounds in. Furan measurement in transformer oil by uvvis spectroscopy using fuzzy logic approach front matter i synopsis an ultraviolet to visible uvvis spectroscopic analysis based on fuzzy logic approach. By measuring the quantity and types of furans present in a transformer oil. The furan and dga tests are specifically not for determining the quality of transformer oil, but for determining any abnormalities in the internal windings of the transformer or the paper insulation of the transformer, which cannot be otherwise detected without a complete.
Furan prediction in transformer oil using artificial neural. Whenever a transformer undergoes abnormal thermal and electrical stresses, certain gases are produced due to the decomposition of the transformer oil. A case study written by parasnath, pushpanjali singh bisht, atesham azhar naiyer published on 20180424 download full article with reference data and citations. Using the frequency response analysis fra in transformers. Postmortem investigation of power transformers profile of. Gray transformer chemistry services introduction the fault free operation of power transformers is a factor of major economic. Analysis of furanic compounds in transformer oil by agilent. Yet, it is not as well understood as dissolved gasin oil analysis dga, nor are the factors that influence the. Furan measurement in transformer oil by uvvis spectrocospy.
Oil diagnostic suites for transformer oil diagnostics. As the insulating materials in a transformer break down due to thermal and electrical stresses, gaseous byproducts are formed. Furan is a heterocyclic organic compound, consisting of a fivemembered aromatic ring with four carbon atoms and one oxygen. Product information dissolved gas analysis and supervision of oil condition in transformers and reactors transformers diagnostic services at abb performs dissolved gas analysis and supervision of oil condition in power transformers, reactors, instrument transformers, circuit breakers and oil insulated cables. If regularly conducted, oil analysis allows identification of specific fault conditions that may be developing. Transformer core and winding have mainly paper insulation. Nitish kumar, nutan chandra, muna kumar, subhajit bhandari. Determination of dissolved gases and furanrelated compounds. Furan is a colorless, flammable, highly volatile liquid with a boiling point close to room temperature.
Dissolved gas analysis dga is the study of dissolved gases in transformer oil. Furan analysis of transformer oil free download as pdf file. It is used in oil filled transformers, some types of highvoltage capacitors, fluorescent lamp ballasts, and some types of highvoltage switches and circuit breakers. According to chris adsett, techenomics general manager, like all preventative maintenance tools regular furan analysis. Transformer oil gas analysis automated sample handling with optional hss sampler. Regular transformer oil analysis is useful in monitoring the condition of engines, turbines and other oil lubricated equipment. Dissolved gas analysis of transformer oil electrical4u. The byproducts are characteristic of the type of incipientfault condition. Ppt transformer tests powerpoint presentation free to.
Furan analysis on transformer oil indicates the degree of degradation of the transformer paper insulation. By measuring the quantity and types of furans present in a transformer oil sample, the paper insulation overall dp can be inferred with a high degree of confidence. A method and a kit for analyzing a degraded product are provided to easily analyze furfural generated from degradation of an insulating material and to enable analysis without an additional. The objective of the research is to use the furan compound analysis in operating oil transformer to. The cellulose has a structure of long chain of molecules. Clay treatment process on tobs will give us the finished transformer oil. It is the combination of four carbons with hydrogen and one oxygen. Apr 29, 2014 production of transformer oil transformer oil is hydrocarbon product, mainly oil contains napthanic, parrafinic and aromatics.
Furan testing is a way of determining the life of a transformer before this occurs. The furan content in the transformer oil was measured for the first time in 2006 and it was monitored since then, as the values were the highest amongst all the power transformers in tata power. New oil spiked with 1,000 mgml of each of five furan compounds. Transformers were traditionally overdesigned by 300 % to ensure a long service life. Early detection of paper insulation breakdown can prevent major damage or failure to the power transformer. Power transformer diagnostics, monitoring and design. It is used in oilfilled transformers, some types of highvoltage capacitors. Numerous studies have been carried out to investigate transformer ageing in the laboratory, however, field investigations on fullscale or commercial power transformers using furan analysis are lacking. Without the furan analysis, therefore, the problem might have gone undetected until there was a catastrophic inservice failure. Furan analysis of transformer oil transformer phases.
Transformer oil analysis testing service for monitoring the condition of transformer oils routine testing of transformer insulating oil is an essential maintenance function that ensures a safe working. Morgan tm schaffer transformers the inside view transformer tests oil tests and online monitoring can increase transformer life expectancy by. The furan and dga tests are specifically not for determining the quality of transformer. Transformer oil test methods include astm, bs,and other recognized transformer oil analysis testing procedures. Pdf furan analysis for liquid power transformers researchgate. Transformer oil analysis wearcheck transformer oil. Furan prediction in transformer oil using artificial. Five furanic compounds were quantified by hplc analysis after the samples of transformer oil were extracted by liquidliquid extraction procedure using acetonitrile. Among the applied methods, the frequency response analysis fra reflects the real situation of the internal faults such as short circuits, mechanical displacement and deformation of the transformer windings. When the furan count is above 2500ppb, it means the transformer is about to fail. Results from the dissolved gas analysis sample, however, did not reveal any irregularities with the transformer.
After the hot filtration operation transformer oil is ready for filling the transformers. Since the furan analysis offers an easy and noninvasive way to get valuable information about the condition of. The objective of the research is to use the furan compound analysis in operating oil transformer. Postmortem investigation of power transformers profile. Study of furanic compounds in transformer oil study conclusions the main objective of establishing a data bank for various age groups of transformers has been met and the analysis of results detailed in chapter 7. Gray transformer chemistry services introduction the fault free operation of power transformers is a factor of major economic importance and safety in power supply utilities and. Assessing remnant life of transformer based on furan. In this application news, the astm d5837 test method was followed for the quantitative analysis of furan derivatives in transformer oil. The same can be said for transformer oils used to insulate many transformers and other electrical distribution equipment. Study of furanic compounds in transformer oil study conclusions the main objective of establishing a data bank for various age groups of transformers has been met and the analysis of.
Transformer oil introduction from wikipedia fuootech. Transformer oil testing and analysis provides important information regarding any such incipient faults, without the need to pull down the equipment from its running condition. However, tests such as furan analysis or paper degree of polymerization the analysis is not always. Analysis of furanic compounds in transformer oil by. William morse a free powerpoint ppt presentation displayed as a flash slide show on id. Prior to furan analysis, dissolved gas analysis in oil was the only noninvasive test performed on transformers that could indicate internal problems. Keywords rla, degree of polymerization, furan content, dissolved gas analysis.
Dissolved gas analysis for transformers international electrical niche market testing by lynn hamrick. Measures the furfuradehyde and related furanic compounds in transformer oil and other mineral insulating oils. Monitoring of low levels of furfural in power transformer oil with a. Transformer fault diagnosis, case study, frequency response analysis fra, polarization and depolarization current pdc. Transformer oil holds critical information on the condition of the transformer from thermal and electrical faults to contamination and degradation of the oil. Furan indicates the abnormal stress, overheat, short duration in a transformer. Dissolved gas analysis is the single most important test performed on oils from transformers. Astm d5837 15 standard test method for furanic compounds in. Conclusion a fast method for the analysis of 4 furanic compounds in transformer oil in 5. Chemical compounds containing such rings are also referred to as furans. Without monitoring, these conditions can take a toll on the life of a transformer. Transformer oil analysis basic introduction by n robinson, wearcheck as blood tests disclose ones state of health, so oil analyses disclose the condition of a transformer.
1357 938 1098 222 179 290 298 1128 1029 234 291 1072 1188 1508 499 357 1377 635 83 836 382 441 185 718 812 167 398 1082 459 699 887 14 457 395 320 605 868 1191 461 577 443 232 884 382 173