Syed islam, for guidance and encouragement throughout the duration of the project. Prior to furan analysis, dissolved gas analysis in oil was the only noninvasive test performed on transformers that could indicate internal problems. Although dissolved gas analysis measurements of transformer oil provide concentrations of numerous gases, such as nitrogen n 2, we restrict ourselves to key gases suggested in 3, i. While being recycled, used oil is regulated by 40 cfr 279.
Transformer oil or insulating oil is an oil that is stable at high temperatures and has excellent. Use resulting in chemical or physical change or contamination may also subject it to regulation as hazardous waste. The study results and analysis show that there are 36 transformers in service with relatively high value of. Evaluating transformer condition using dga oil analysis. Transformer oil analyst software, the fault condition of the transformer can be diagnosed. 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. Dissolved gas analysis of transformer oil electrical4u. 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. This course will introduce latest and effective transformer fundamentals. Coconut oil as an alternative to transformer oil pdf. The sfl is the number of hours the oil remains sludge free.
Like blood testing in human beings, its an essential indicator of good health. It is formulated with a mineral base stock and provides good oxidation stability. The above standard testing is offered in specific diagnostic suites designed to provide the maximum condition information on the transformers. Transformer oil is a required addition to electrical transformers. As the data below shows, the solubility of various gases in beta fluid is very similar to that. Relationship between dp and 2furfural content naphthenic following table2 is extracted from assessing remnant life of transformer based on furan content in transformer oil and by sanjay. The course transformer oil analysis, scheduled on 06 september 2017, in johannesburg, south africa, will provide you with a broad understanding on how oil testing is a provenloss prevention technique, and why it should be part of any conditionbased predictive maintenance program. Transformer life is shortened by a number of events. Because these generate a lot of heat that must be removed, they need to be insulated and they have to resist sparking, the physical and chemical properties of certain oils make them ideal for use in transformers and capacitors. The transformer failed in service while undergoing poweron purification to remove moisture from the insulating oil. The value of furanic compound in free breathing transformers are found to be higher than the sealed conservator type, possibly indicating.
Around the gap between the electrodes, free electrons should be. By the furan analysis, we check the condition of paper in transformer oil. Furan analysis on transformer oil indicates the degree of degradation of the transformer paper insulation. After the hot filtration operation transformer oil is ready for filling the transformers.
The most sensitive and reliable technique for evaluating the health of transformer is dissolved gas analysis dga. The transformers fluid not only serves as a heat transfer medium, it also a part of transformers insulation system. Furan testing of transformers oil linkedin slideshare. Furan test is used to determine the life of a transformer and condition of transformer oil in transformer oil. When the furan count is above 2500ppb, it means the transformer is about to fail. Cellulose is also present in large quantities in wood, pressboards, and mechanical supports that are used during the manufacturing process figure 1. Under federal regulations, used oil is a solid waste managed under 40 cfr 279. The fault free operation of power transformers is a factor of major economic importance and safety in power supply utilities and industrial consumers of electricity. 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 industrial consumers of electricity. Condition monitoring of any transformer can only be successful if it is possible to have a early fault detection. In substation, transformer is the most efficient and costly equipment.
Transformer oil testing is a proven loss prevention technique that should be a part of any condition based predictive maintenance program. Testing for corrosive sulfur in transformer oil download paper. Which gi ves p ar ameters relev an t to th e agein g pr oce ss. Transformer oil purchase specifications developed under the auspices of the doble oil committee. The objective of the research is to use the furan compound analysis in operating oil transformer to determine their degree.
T able 11 correlations of furan analysis results with oil parameters of 1. In th international conference on optimization of electrical and electronic equipment, 2426 may, 2012, brasov, romania pp. Calculation of the remaining lifetime of power transformers paper insulation. Oil analysis is the internationally recognised gold standard for monitoring the condition of transformer oil and insulating paper and obtaining an early warning of internal transformer problems. Its functions are to insulate, suppress corona discharge and arcing, and to. This course will introduce latest and effective transformer. This paper uses dissolved gas analysis to study the history of different transformers in service, from which dissolved combustible gases dcg in oil are used as a diagnostic tool for evaluating the condition of the transformer.
Good linearity was observed from 50 ppb to 9000 ppb with a linear correlation of 0. A representative sample of the oil shall be examined in a 100. W hich giv es par ameters th at ca n be u sed to i dentif y th e oi l. Transformer oil testing by robert turcotte, manager, electrical loss control the hartford steam boiler inspection and insurance company the value of transformer oil testing transformer oil testing is a proven loss prevention technique which should be a part.
Or goal is to make sure that your equipemnt is in peak condition through the examination of oil samples. Dissolved gasinoil analysis dga method these gases are analyzed quantitatively to infer existence of any fault mainly incipient faults7. The dissolved gas analysis dga of transformers can provide an insight view related to thermal and electrical stresses during operations of oil immersed power transformers 1. The degradation materials produce co and co2 gases. Furan measurement in transformer oil by uvvis spectroscopy using fuzzy logic approach front matter ii acknowledgement the author would like to express his sincere thanks to his supervisor, prof. Oil diagnostic suites for transformer oil diagnostics. However, in california, used oil is managed as hazardous waste until.
Over the decades, dissolved gas analysis dga monitoring has become. Dissolved gas analysis dga is the most important transformer. Whenever a transformer undergoes abnormal thermal and electrical stresses, certain gases are produced due to the decomposition of the transformer oil. Analysis of furanic compounds in transformer oil by. Fundamentally, transformer insulation contains an oil impregnated cellulose paper that surrounds conductors and layers of multiple conductors, which form the transformer windings.
Doble engineering company materials laboratory, application note. Early detection of paper insulation breakdown can prevent major damage or failure to the power transformer. Laboratories tellab in tullow, county carlow, we operate irelands only specialised transformer oil analysis laboratory, certified to. All data can be downloaded either as adobe pdf or in text format by email for import into. Destruction of dibenzyl disulfide in transformer oil download paper. Dnv gl provides independent oil laboratory services covering sampling, analysis and interpretation. So in order to protect from faults, transformer oil testing is required.
Yet, it is not as well understood as dissolved gasin oil analysis dga, nor are the factors that. 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 environment and helps eliminate the possibility of disrupted production resulting from a transformer failure or explosion. Transformer oil analysis report company abc singapore pte ltd manufacturer toshiba transformer id traa02 year of manufacturer 1989 serial number 111111 oil capacity 12000 kg voltage 66,000 22,000 v sampling temperature 34. The authors used four interpretation dissolved gas analysis dga. The distribution of these gases can be related to the type of electrical fault, and the rate of gas generation can indicate the severity of the fault. Gases generate by degradation of fluid or cellulose. If regularly conducted, oil analysis allows identification of specific fault conditions that may be developing. Furan indicates the compounds of carbon and hydrogen.
Power transformer diagnostics, monitoring and design. Transformer oil or insulating oil is a highly refined mineral or silicone oil that is stable at high temperatures and has excellent electrical insulating properties. It is therefore prudent to periodically perform tests on the oil to determine whether. Since the first method for the analysis of methanol in transformer oil became available in 2007 1, a handful of publications have presented analytical methods for its determination 4,9,1819. New approach to estimate furan contents in transformer oil using spectroscopic analysis. Production of transformer oil transformer oil is hydrocarbon product, mainly oil contains napthanic, parrafinic and aromatics. Dissolved gas analysis guide for transformers filled with. Pdf methanol detection in transformer oils using gas.
The standard test suites are designed for individual samples to deliver a routine set of oil analysis at low cost. One important part of diagnostic testing is the dissolved gas analysis dga. What is the importance of furan analysis on transformer oil. Pdf transformer lifetime management by analyzing the. Detects most internal faults, some external faults and some operational errors. Obtain proficient samples for your transformer oil analysis program. The ultimate starting point for any transformer assessment is the oil analysis. The course transformer oil analysis, scheduled on 10 october 2017, in berlin, germany, will provide you with a broad understanding on how oil testing is a provenloss prevention technique, and why it should be part of any conditionbased predictive maintenance program. It is used in oilfilled transformers, some types of highvoltage capacitors, fluorescent lamp ballasts north america only, and some types of highvoltage switches and circuit breakers.
A fast method for the analysis of 4 furanic compounds in transformer oil in 5. It is used in oilfilled transformers, some types of high voltage capacitors, fluorescent lamp ballasts, and some types of. Experimental studies on utilization of used transformer. Clay treatment process on tobs will give us the finished transformer oil. Performance of natural ester as a transformer oil in moisturerich environments. Dissolved gas analysis dga is the study of dissolved gases in transformer oil. Small samples of oil are taken for this test, using a clean, moisturefree containersyringe.
Magnetechs complete equipment analysis offers the highest quality analysis for your transformer needs. Astm d923, method of sampling electrical insulating oil from a transformer differences between dissolve gas analysis with mineral oil and with beta fluid gas solubility. Summary the aim of this work is the development of the pcbs determination method in the transformer oil by the spe and gas chromatograph analysis. 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. Transformer oil uninhibited is a highly refined, efficient performance uninhibited transformer oil, providing high dielectric strength and reliable low temperature performance. New approach to estimate furan contents in transformer oil. Dissolved gas analysis dga is the study of dissolved gases in transformer oil insulating materials within transformers and electrical equipment break down to liberate gases within the unit. Different dga techniques for monitoring of transformers. In the experiment proper, we considered only the acidity, whose concentration in the transformer oil increases with aging if the transformer, moisture, and a suitable impurity like naohaq.
The benefits of transformer online dissolved gas monitoring. Commons attribution cc by license, which allows users to download, copy and build upon published. Magnetech offers complete equipment analysis for transformer oil author. 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. This is usually done in transformers aging above 15 years. Natural ester dielectric fluid overview envirotemp fr3. When the fault is major, the production of decomposed gases are significant and they get collected in a buchholz relay. Dga dissolved gasinoil analysis astm d 3612 c moisturewater content in oil astm d 1533 furanic compounds in oil.
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