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. Dissolved gas analysis dga test of transformer oil. The reliability of transformers is a prime concern to grid operators. Transformer oil is used in oil filled electrical power transformers to insulate, stop arcing and corona discharge, and to dissipate the heat of the transformer i. This is the critical acid number and deterioration increases rapidly. Transformer oil test methods include astm, bs,and other recognized transformer oil analysis testing procedures. Agilent transformer oil gas analyzers generate reproducible results per astm d3612, including outputs via customizable reports. Assessing remnant life of transformer based on furan. It also provides valuable input to plan for maintenance. Transformer oil also known as insulating oil is a special type of oil which has excellent electrical insulating properties and is stable at high temperatures.
The acidity of oil in a transformer should never be allowed to exceed 0. Transformer oil gas analysis automated sample handling with optional hss sampler. Procedures for drawing transformer oil samples general sampling electrical insulating oil for laboratory analysis requires care to ensure that the sample is representative of the product being sampled. The analysis is performed under iso 17025 accreditation using the iec61619 standard method. Dissolved gas analysis of power transformer introduction insulating oil in an.
May be generated in very small quantities at lower temperatures e. Whenever a transformer undergoes abnormal thermal and electrical stresses, certain gases are produced due to the decomposition of the transformer oil. Pdf a guide to transformer oil analysis farooq siddiqui. Weidmann diagnostic solutions electrostatic precipitator transformerrectifier evaluation using dissolved gas inoil analysis abstract electrostatic precipitators esps are critical to the clean delivery of electric power as well as controlling particulate emissions from variousindustrial processes. The objective of the research is to use the furan compound analysis in operating oil transformer to determine their degree of polymerization, diagnose faults and know the aging state of the. This provides a more visual idea of determining the trending of these gases. The number of failures divided by the number of trials gives the probability of failure.
See table 3 findings the transformer was removed to a works facility and inspected. Dissolved gas analysis for transformers international electrical. Bureau veritas provides transformer oil analysis to power generating companies. In the experiment proper, we considered only the acidity, whose concentration in the transformer oil increases with aging if the. 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. 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. Though bio based transformer oil have gained attention due to stringent environmental issues but their usage is restricted due to limited advantage. Dissolved gas analysis iec 60599 for many years the method of analysing gases dissolved in the oil has been used as a tool in transformer diagnostics in order to detect incipient faults, to supervise suspect trans. There are two major types of transformer oil used in the industry. Transformer service online dissolved gas monitoring. Basics, maintenance, and diagnostics ix contents continued page 6. Regular monitoring of the oil enables potential problems with both the transformer and the oil to be diagnosed.
Testing the condition and quality of transformer insulating oil provides data showing the actual condition of the transformer, and its remaining lifetime. Transformer oil gas, transformer oil analysis agilent. 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 analysis preventative maintenance program. The hartford steam boiler inspection and insurance company. 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. The paper insulation clearly was at end of life criteria. The dga of transformer oil was done regularly and no abnormality was indicated till oct 2007. Transformer oil market global industry analysis, size and.
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. Pdf evaluating transformer condition using dga oil analysis. A major advantage of continuous gas monitoring, as compared to laboratory analysis, is the capability to reduce the risk of an unplanned incident or failure and costly consequences of the related outage. Power transformer fault severity estimation based on.
Transformers were traditionally overdesigned by 300 % to ensure a long service life. We then run a monte carlo simulation using this distribution across a set time period and check whether the transformer fails or not. These toxic organic pollutants were used extensively in transformers for decades because of their ideal properties for use in transformers. All limits are based upon standards widely accepted throughout the industry. 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.
Regular transformer oil analysis is useful in monitoring the condition of engines, turbines and other oil lubricated equipment. Transformer oil analysis methods fuel cleaning equipment. When the fault is major, the production of decomposed gases are significant. Specific transformer oil test method availability will vary depending upon location. 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. Transformer oil testing is a proven loss prevention technique which should be a part of any condition based predictive maintenance program. Weidmann diagnostic solutions electrostatic precipitator.
Assessing remnant life of transformer based on furan content. Jun 18, 2019 dissolved gas analysis dga is the study of dissolved gases in transformer oil. Transformer oil analysis includes several types of transformer fluid tests, such as dissolved gas analysis and screen tests. Transformer oil purchase specifications developed under the auspices of the doble oil committee march, 2017. Transformer lifetime prediction stanford university. Pdf transformer oil analysis hemant waghmare academia. Applying oil analysis to maximise machine life oil analysis is a means to an end. Dissolved gas analysis guide for transformers filled with. Pcb analysis detects the presence of polychlorinated biphenyls in transformer oil. The oil used in transformers is hydrocarbon mineral oil. Dissolved gas analysis dga is the study of dissolved gases in transformer oil. Transformers can selfdestruct if neglected over time and failure to conduct regular transformer oil testing can allow problems to go undetected.
Gases generate by degradation of fluid or cellulose. Therefore, it is imperative that periodic samples be taken for analysis and timely improvement of oil quality, before bad quality oil. Analysis and simulations the first step of the simulation is to generate the transformer. Transformer oil purchase specifications developed under the auspices of the doble oil committee march, 2017 composition this specifications covers new insulating oil for general applications for liquidfilled electrical equipment, which are manufactured from mineral crude, which may be either naphthenic, which has a very low naturally. Detection down to parts per million ppm levels is generally achievable by gas chromatography 2 and requires extraction of an oil sample of the transformer for laboratory analysis 3. After the transformer oil test is completed, the insulation oil is stirred automatically and the test sequence is performed repeatedly. It is a source of data that should inform practical decisionmaking and actions that lead to extended equipment availability and lifespan and efficient resource utilisation. Fault severity is the core property in transformer. The transformer oil testing device measures and reports the root mean square value of the breakdown voltage.
Some of the most common tests for transformer oil are as follows. Transformer oil testing is a proven loss prevention technique that should be a part of any condition based predictive maintenance program. Therefore, it is imperative that periodic samples be taken for analysis and timely improvement of oil quality, before bad quality oil can cause degradation of insulation. If regularly conducted, oil analysis allows identification of specific fault conditions that may be developing. Before attempting to draw the sample identify the type of cooling liquid in the transformer. Iii analysis and discussion the diagnostic tests were done regularly for the above transformer and no abnormality was indicated. Aug 30, 2019 transformer oil also known as insulating oil is a special type of oil which has excellent electrical insulating properties and is stable at high temperatures. Routine testing of transformer oils and insulating oils on a regular schedule is an accepted industry. 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 transformer oil analysis indicated a case of advanced paper insulation deterioration. Transformer oil is used in oilfilled electrical power transformers to insulate, stop arcing and corona discharge, and to dissipate the heat of the transformer i. Use our free transformer asset management tool to automatically assess your transformers health. 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 of any conditionbased predictive maintenance program.
This early warning system can allow management to identify maintenance priorities, plan work assignment schedules, and order necessary parts and materials. All data can be downloaded either as adobe pdf or in text format by email for import into. Testoils engine oil analysis is designed to uncover lubrication anomalies generated by faulty mechanical issues as well as mechanical issues brought on by lubrication problem. Shipping containers should be dedicated to new transformer oils. This analysis will predict the transformer reliability and the associated costs based on relevant degradation. The dga will require the removal of an oil sample from the transformer and this. Highly efficient and rigorous technology used in agilent gc columns assures columntocolumn reproducibility and ultimate efficiency. It has been a few years since the publication of the first edition of spectro scientifics inservice oil analysis handbook. Product information dissolved gas analysis and supervision of. Despite being the extensively applied methodology in power transformer incipient fault detection, solely dissolved gas analysis dga techniques cannot quantify the detected fault severity. Transformer oil analysis bureau veritas commodities. Our original goal was to compile a comprehensive reference book of common inservice oil analysis techniques to help readers understand and choose the right technique and. All data can be downloaded either as adobe pdf or in text format by email for import into the delta x.
Page 1 transformer nameplate, identification name, oil and gas results and any notable comments and deficiencies. Transformers were traditionally overdesigned by 300% to ensure a long service life. Detects most internal faults, some external faults and some operational errors. The same can be said for transformer oils used to insulate many transformers and other electrical distribution equipment. Dissolved gas in oil analysis, screen tests, moisture content, furan compounds, and pcb. Transformer oil and solid insulation are subject to natural wear and aging in the process of transformer operation. Decision making on transformer insulation condition based on the evaluated incipient faults and aging stresses has been the norm for many asset managers. High energy faults not only degrade the transformers insulationoil, paper, wood etc but can generate metal particles that will disperse in the oil. Along with the oil sample quality tests, performing a dissolved gas analysis dga of the insulating oil is useful in evaluating transformer health. Transformer oil analyst software, the fault condition of the transformer can be diagnosed.
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