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. Transformer oil or insulating oil is an oil that is stable at high temperatures and has excellent electrical insulating properties. Transformer oil purchase specifications developed under the auspices of the doble oil committee march, 2017. New oil spiked with 1,000 mg ml of each of five furan compounds. Quantitative analysis of furanic compounds in transformer oil. The cellulose has a structure of long chain of molecules. The advantage of furan assessment, is that the it does not produce by oil.
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. By measuring the quantity and types of furans present in a transformer oil. 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. Analysis of less volatile furan related compounds requires a second technique involving liquid or solidphase extraction followed by highperformance liquid chromatography 4,5. The transformer insulation system, primarily consisting of mineral oil, paper and other cellulosic materials, has a finite life, even under ideal operating conditions. An alternative method is to estimate the dp from the oil furan concentration 2. Furan prediction in transformer oil using artificial neural. Furan analysis of transformer oil transformer phases of matter. As the insulating materials in a transformer break down due to thermal and electrical stresses, gaseous byproducts are formed. Furan is a colorless, flammable, highly volatile liquid with a boiling point close to room temperature.
Numerous studies have been carried out to investigate transformer. 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. Transformer oil gas analysis automated sample handling with optional hss sampler. In this application news, the astm d5837 test method was followed for the quantitative analysis of furan derivatives in transformer oil.
Hence, transformer oil and paper insulation are essential sources to detect incipient and fast developing. The furan content details are tabulated in table ii. Formation of furan products in insulating oil, in iee proceedings science. 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. The same can be said for transformer oils used to insulate many transformers and other electrical distribution equipment.
Keywords rla, degree of polymerization, furan content, dissolved gas analysis. All the transformers have been in service for more than 40 years. Apr 29, 2014 production of transformer oil transformer oil is hydrocarbon product, mainly oil contains napthanic, parrafinic and aromatics. Five furanic compounds were quantified by hplc analysis after the samples of transformer oil were extracted by liquidliquid extraction procedure using acetonitrile. 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. Table ii furan content in transformer oil ppb aug 06 jan 08 feb 08 apr 08 5 hydroxymethyl2. Astm d5837 15 standard test method for furanic compounds in. Analysis of paper insulation for its dp value requires removal of a few strips of paper.
After the hot filtration operation transformer oil is ready for filling the transformers. Product information dissolved gas analysis and supervision of. Using the frequency response analysis fra in transformers internal fault detection jalal abdallah. Furan indicates the abnormal stress, overheat, short duration in a transformer. Astm d5837 15 standard test method for furanic compounds. Performance of natural ester as a transformer oil in moisturerich environments. Dissolved gas analysis dga is the study of dissolved gases in transformer oil.
Assessing remnant life of transformer based on furan. Using the frequency response analysis fra in transformers. Transformer oil analysis wearcheck transformer oil. 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. Transformer oil analysis preventative maintenance program. Prior to furan analysis, dissolved gas analysis in oil was the only noninvasive test performed on transformers that could indicate internal problems. Furan analysis on transformer oil indicates the degree of degradation of the transformer paper insulation. University eee department scope analysis the 2furtural and related furan compounds during cellulosic insulation in mineral insulating oil samples. Furan analysis of transformer oil free download as pdf file. Ppt transformer tests powerpoint presentation free to. Nair published on 20180326 download full article with reference data and citations.
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. According to chris adsett, techenomics general manager, like all preventative maintenance tools regular furan analysis. Pulsed amperometric detection of furan compounds in. Transformers were traditionally overdesigned by 300 % to ensure a long service life. 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.
Transformer oil introduction from wikipedia fuootech. The objective of the research is to use the furan compound analysis in operating oil transformer to. The byproducts are characteristic of the type of incipientfault condition. Transformer oil test methods include astm, bs,and other recognized transformer oil analysis testing procedures. 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.
Dissolved gas analysis is the single most important test performed on oils from transformers. 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. 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. Oil diagnostic suites for transformer oil diagnostics. Production of transformer oil transformer oil is hydrocarbon product, mainly oil contains napthanic, parrafinic and aromatics. If regularly conducted, oil analysis allows identification of specific fault conditions that may be developing. Transformer oil holds critical information on the condition of the transformer from thermal and electrical faults to contamination and degradation of the oil. Furan analysis of transformer oil on233w8e9yl0 idocpub.
It is used in oilfilled transformers, some types of highvoltage capacitors. Routine testing of transformer oils and insulating oils on a regular schedule is an accepted industry. Postmortem investigation of power transformers profile of. Analysis of furanic compounds in transformer oil by. 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. Quantitative analysis of furanic compounds in transformer. Early detection of paper insulation breakdown can prevent major damage or failure to the power transformer. Furanic compounds in electrical insulating liquids yongrun. Postmortem investigation of power transformers profile. Morgan tm schaffer transformers the inside view transformer tests oil tests and online monitoring can increase transformer life expectancy by. Specific transformer oil test method availability will vary depending upon location.
Dissolved gas analysis for transformers international electrical niche market testing by lynn hamrick. Whenever a transformer undergoes abnormal thermal and electrical stresses, certain gases. Degradation of cellulosic insulation in power transformers. Pdf furan analysis for liquid power transformers researchgate. Since the furan analysis offers an easy and noninvasive way to get valuable information about the condition of.
Furan prediction in transformer oil using artificial. Without the furan analysis, therefore, the problem might have gone undetected until there was a catastrophic inservice failure. The same can be said for transformer oils used to insulate many transformers. 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. Product information dissolved gas analysis and supervision. Determination of dissolved gases and furanrelated compounds. Furan analysis of transformer oil transformer phases of. The standard test suites are designed for individual samples to deliver a routine set of oil analysis at low. William morse a free powerpoint ppt presentation displayed as a flash slide show on id. Monitoring of low levels of furfural in power transformer oil with a. Transformer core and winding have mainly paper insulation. Transformer fault diagnosis, case study, frequency response analysis fra, polarization and depolarization current pdc. Whenever a transformer undergoes abnormal thermal and electrical stresses, certain gases are produced due to the decomposition of the transformer oil.
Results from the dissolved gas analysis sample, however, did not reveal any irregularities with the transformer. Oil testing capabilities doble engineering company. Clay treatment process on tobs will give us the finished transformer oil. Power transformer insulation assessment based on oil. Dissolved gas analysis guide for transformers filled with. Five furanic compounds were quantified by hplc analysis after the. Analysis of furanic compounds in transformer oil by agilent. 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. A conventional faulty oilimmersed transformer 400 v 10 kv, 100 kva was diagnosed. The furan and dga tests are specifically not for determining the quality of transformer. Furan indicates the compounds of carbon and hydrogen.
Measures the furfuradehyde and related furanic compounds in transformer oil and other mineral insulating oils. This is usually done in transformers aging above 15 years. 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. Chemical compounds containing such rings are also referred to as furans. Volume 450, issues 12, 21 december 2001, pages 253261. Kr101231586b1 simple test method for furan in aged. The analytical methods used for dissolvedgas analysis generally comprise vacuum extraction 8 or stripping 9 of the gases followed by gas chromatographic separation. Furan analysis when a cellulose molecule depolymerises breaks into smaller lengths or ring structures, a chemical compound known as a furan is formed. Nitish kumar, nutan chandra, muna kumar, subhajit bhandari. New oil spiked with 1,000 mgml of each of five furan compounds. Gray transformer chemistry services introduction the fault free operation of power transformers is a factor of major economic. Dissolved gas analysis of transformer oil electrical4u.
It is used in oil filled transformers, some types of highvoltage capacitors, fluorescent lamp ballasts, and some types of highvoltage switches and circuit breakers. Furan measurement in transformer oil by uvvis spectrocospy. 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. It is the combination of four carbons with hydrogen and one oxygen. There was no significant increase in any of the gases that would typically confirm a problem. The above standard testing is offered in specific diagnostic suites designed to provide the maximum condition information on the transformers. When the furan count is above 2500ppb, it means the transformer is about to fail. What is the importance of furan analysis on transformer oil. Furan analysis of transformer oil transformer phases. The objective of the research is to use the furan compound analysis in operating oil transformer.
A case study written by parasnath, pushpanjali singh bisht, atesham azhar naiyer published on 20180424 download full article with reference data and citations. Nair published on 20180326 download full article with reference data and. 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. 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. Residual life assessment with dga, furan content in transformer oil. Yet, it is not as well understood as dissolved gasin oil analysis dga, nor are the factors that influence the. Without monitoring, these conditions can take a toll on the life of a transformer. Power transformer diagnostics, monitoring and design. Conclusion a fast method for the analysis of 4 furanic compounds in transformer oil in 5. However, tests such as furan analysis or paper degree of polymerization the analysis is not always. Regular transformer oil analysis is useful in monitoring the condition of engines, turbines and other oil lubricated equipment.
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