Case study dissolved gas analysis

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Assessing the condition and early fault detection for wind turbines has become a common and essential practice to improve performance. An important part of the wind turbine regular function is the inspection of bearings hot spots. Bearing failures develop over time but in the very early stages display abnormal operation by a build-up of gas in the grease. Early detection of bearing failures allow for converting unplanned into scheduled maintenance thereby reducing maintenance cost and increasing production. Dissolved gas analysis is based on the principles used for more than fifty years for monitoring the condition of oil-filled transformers.

For Dissolved Gas Analysis & Electrochemistry

Progress in Transformer Dissolved-Gas Analysis - NETAWORLD JOURNAL

The diagnostic analysis of the oil sample reports indicated that a number of the units were found to have excessive moisture within the insulation, causing low dielectric strength of the insulating fluid. This condition is undesirable as it not only compromises the integrity of the insulation, but also impacts long term reliability and return on investment by accelerated ageing. After reviewing the previous annual oil sample reports, it was felt that the technique that was used in the past to take periodic oil samples from transformers to monitor and manage dryout processes may have some shortfalls. Implement correct oil sample process The evaluation of moisture in paper is very dependent on capturing the top oil temperature of the unit at the time of taking the sample and the technique with which the sample is taken.

Dissolved Gas Analysis

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Skip to Main Content. A not-for-profit organization, IEEE is the world's largest technical professional organization dedicated to advancing technology for the benefit of humanity. Use of this web site signifies your agreement to the terms and conditions. Understanding Dissolved Gas Analysis DGA techniques and interpretations Abstract: The use of Dissolved Gas Analysis DGA as a method for determining the types of pending or occurring faults within power transformers has been in practice for many years. It has been proven that the generation of certain gases within a transformer is an excellent indicator that a failure is pending.
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