Major Utility Implements Innovative Approach to Transformer Health Assessment

Find out how a major US utility is already using Reliability-based DGA to help identify and focus on at-risk transformers so they can implement an effective strategy to maintain and replace them as needed. Learn more…  

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Six Common Data Issues in Transformer DGA

Power transformers are designed to pass large amounts of energy through with very high efficiency, so in normal operation and in the absence of unusual stress there should be no degradation of the oil and paper insulation inside the transformer. Insulation damage or degradation resulting from an abnormal condition (“fault”) is almost always detectable by the formation of… Continue reading

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Identifying Transformer Faults with DGA

Imagine trying to explain power transformer fault detection to your child’s second grade class or to a CFO who does not have a technology background.  The conversation might start like this: “like a doctor takes a blood sample from your body to detect an illness, an engineer may take an oil sample from a transformer to… Continue reading

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Transformer Reliability and Dissolved-Gas Analysis

Authors: J.J. Dukarm and M. Duval 2016 CIGRE Canada Conference October 17, 2016 Dissolved gas analysis (DGA) is widely used for transformer condition screening and assessment. Conventional DGA practice is to employ statistically derived limits for combustible gas concentrations and their increments or rates of increase for the purpose of classifying a transformer’s condition as… Continue reading

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Thermodynamic Estimation of Transformer Fault Severity

Authors:  F. Jakob and J.J. Dukarm Published in Power Delivery, IEEE Transactions vol.30, no.4, pp.1941-1948, Aug. 2015 doi: 10.1109/TPWRD.2015.2415767 Conventional practice for transformer dissolved gas analysis (DGA) is to use concentrations of several fault gases, with or without total dissolved combustible gas, for evaluating apparent fault severity. We suggest a simpler approach based on the… Continue reading

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