Good linearity was observed from 50 ppb to 9000 ppb with a linear correlation of 0. Over the decades, dissolved gas analysis dga monitoring has become. This course will introduce latest and effective transformer. Power transformer diagnostics, monitoring and design. Coconut oil as an alternative to transformer oil pdf. By the furan analysis, we check the condition of paper in transformer oil.
T able 11 correlations of furan analysis results with oil parameters of 1. 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 proposed method was used for the cleanup of modeling solutions of transformer oil polluted by. 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. Transformer oil is a required addition to electrical transformers.
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. 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 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. Experimental studies on utilization of used transformer. After the hot filtration operation transformer oil is ready for filling the transformers. Prior to furan analysis, dissolved gas analysis in oil was the only noninvasive test performed on transformers that could indicate internal problems. This course will introduce latest and effective transformer fundamentals. 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. New approach to estimate furan contents in transformer oil. Like blood testing in human beings, its an essential indicator of good health. It is therefore prudent to periodically perform tests on the oil to determine whether. So in order to protect from faults, transformer oil testing is required. Dissolved gasinoil analysis dga method these gases are analyzed quantitatively to infer existence of any fault mainly incipient faults7. Different dga techniques for monitoring of transformers.
The most sensitive and reliable technique for evaluating the health of transformer is dissolved gas analysis dga. Or goal is to make sure that your equipemnt is in peak condition through the examination of oil samples. Cellulose is also present in large quantities in wood, pressboards, and mechanical supports that are used during the manufacturing process figure 1. The standard test suites are designed for individual samples to deliver a routine set of oil analysis at low cost. 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. Evaluating transformer condition using dga oil analysis. Whenever a transformer undergoes abnormal thermal and electrical stresses, certain gases are produced due to the decomposition of the transformer oil. 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. Dissolved gas analysis dga is the study of dissolved gases in transformer oil. Which gi ves p ar ameters relev an t to th e agein g pr oce ss. Doble engineering company materials laboratory, application note. Transformer oil analyst software, the fault condition of the transformer can be diagnosed.
Around the gap between the electrodes, free electrons should be. Laboratories tellab in tullow, county carlow, we operate irelands only specialised transformer oil analysis laboratory, certified to. Pdf methanol detection in transformer oils using gas. A fast method for the analysis of 4 furanic compounds in transformer oil in 5. Analysis of furanic compounds in transformer oil by. The transformers fluid not only serves as a heat transfer medium, it also a part of transformers insulation system. Transformer oil testing is a proven loss prevention technique that should be a part of any condition based predictive maintenance program. However, in california, used oil is managed as hazardous waste until. Dga dissolved gasinoil analysis astm d 3612 c moisturewater content in oil astm d 1533 furanic compounds in oil. The sfl is the number of hours the oil remains sludge free. It is used in oilfilled transformers, some types of high voltage capacitors, fluorescent lamp ballasts, and some types of. As the data below shows, the solubility of various gases in beta fluid is very similar to that. Testing for corrosive sulfur in transformer oil download paper. Gases generate by degradation of fluid or cellulose.
Calculation of the remaining lifetime of power transformers paper insulation. 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. 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. Yet, it is not as well understood as dissolved gasin oil analysis dga, nor are the factors that. The authors used four interpretation dissolved gas analysis dga. Transformer oil purchase specifications developed under the auspices of the doble oil committee. Early detection of paper insulation breakdown can prevent major damage or failure to the power transformer. Dissolved gas analysis of transformer oil electrical4u. Obtain proficient samples for your transformer oil analysis program. Furan analysis on transformer oil indicates the degree of degradation of the transformer paper insulation. 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. Its functions are to insulate, suppress corona discharge and arcing, and to.
The value of furanic compound in free breathing transformers are found to be higher than the sealed conservator type, possibly indicating. W hich giv es par ameters th at ca n be u sed to i dentif y th e oi l. 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. 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.
Furan testing of transformers oil linkedin slideshare. Transformer oil or insulating oil is an oil that is stable at high temperatures and has excellent. Our 50 ml glass syringes are dedicated for sampling transformer oil for tests such as. What is the importance of furan analysis on transformer oil.
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. Syed islam, for guidance and encouragement throughout the duration of the project. Furan indicates the compounds of carbon and hydrogen. One important part of diagnostic testing is the dissolved gas analysis dga. Commons attribution cc by license, which allows users to download, copy and build upon published. Pdf transformer lifetime management by analyzing the. The above standard testing is offered in specific diagnostic suites designed to provide the maximum condition information on the transformers. Under federal regulations, used oil is a solid waste managed under 40 cfr 279.
In th international conference on optimization of electrical and electronic equipment, 2426 may, 2012, brasov, romania pp. Dissolved gas analysis dga is the most important transformer. 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. 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. When the fault is major, the production of decomposed gases are significant and they get collected in a buchholz relay. Clay treatment process on tobs will give us the finished transformer oil. A representative sample of the oil shall be examined in a 100.
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. Oil diagnostic suites for transformer oil diagnostics. Transformer life is shortened by a number of events. Transformer oil uninhibited is a highly refined, efficient performance uninhibited transformer oil, providing high dielectric strength and reliable low temperature performance. Transformer oil or insulating oil is an oil that is stable at high temperatures and has excellent electrical insulating properties. It is formulated with a mineral base stock and provides good oxidation stability.
The transformer failed in service while undergoing poweron purification to remove moisture from the insulating oil. In substation, transformer is the most efficient and costly equipment. Dnv gl provides independent oil laboratory services covering sampling, analysis and interpretation. Magnetech offers complete equipment analysis for transformer oil author. Small samples of oil are taken for this test, using a clean, moisturefree containersyringe. 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. 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. Natural ester dielectric fluid overview envirotemp fr3. All data can be downloaded either as adobe pdf or in text format by email for import into. 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.
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. Condition monitoring of any transformer can only be successful if it is possible to have a early fault detection. 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. While being recycled, used oil is regulated by 40 cfr 279. The ultimate starting point for any transformer assessment is the oil analysis. New approach to estimate furan contents in transformer oil using spectroscopic analysis. The degradation materials produce co and co2 gases. If regularly conducted, oil analysis allows identification of specific fault conditions that may be developing. Production of transformer oil transformer oil is hydrocarbon product, mainly oil contains napthanic, parrafinic and aromatics. This is usually done in transformers aging above 15 years. Magnetechs complete equipment analysis offers the highest quality analysis for your transformer needs. The objective of the research is to use the furan compound analysis in operating oil transformer to determine their degree. Detects most internal faults, some external faults and some operational errors.
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. 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. The benefits of transformer online dissolved gas monitoring. 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.
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. Performance of natural ester as a transformer oil in moisturerich environments. 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. Destruction of dibenzyl disulfide in transformer oil download paper. 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. Dissolved gas analysis guide for transformers filled with. Fundamentally, transformer insulation contains an oil impregnated cellulose paper that surrounds conductors and layers of multiple conductors, which form the transformer windings.