CASE STUDIES ON TRANSFORMER FAULTS DETECTED USING ONLINE DISSOLVED GAS MONITORS
This month’s Featured Technical Paper is from the Proceedings of the 2020 International Conference of Doble Clients. The paper is titled: Case Studies on Transformer Faults Detected Using Online Dissolved Gas Monitors.
Abstract
Dissolved gas analysis (DGA) is the leading diagnostic tool in our industry for assessing the overall health of transformers. While DGA started as a laboratory test, in more recent years continuous monitoring of dissolved gasses by online monitoring equipment has become an additional tool for more comprehensive detection and monitoring of problems. On-line monitoring provides earlier detection and diagnosis of incipient fault conditions in transformers. It also helps in monitoring developing problems where the condition is rapidly changing. Prompt fault detection is desirable as it can minimize the risk of a catastrophic failure. This case study paper will provide information about fault investigations that were initially launched due to abnormal gassing detected by online DGA monitors.
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