MIPSYCON 2023
Xcel Energy improves transformer fault assessments using online DGA monitoring
Explore how Xcel Energy, a prominent utility company, enhances its transformer fault assessment strategies by integrating a mobile online Dissolved Gas Analysis (DGA) monitor alongside traditional offline methods.
This case study highlights Xcel Energy’s experience using the Vaisala OPT100 DGA monitor on a mobile platform to analyze gassing patterns in transformers with abnormal lab-based DGA results.
By combining both methods and additional offline tests, Xcel Energy successfully diagnosed and managed a potentially problematic situation with a faulty transformer. The study underscores the synergy of offline and online DGA analysis in making more informed and confident maintenance decisions, improving grid reliability, and optimizing asset management & safety.
An Oncor Case: Using real-time online DGA to safeguard a transformer's end-of-life operation
This case study from Oncor explores the detection of severe faults and the overall monitoring process and procedure during an old transformer’s final months in service – its end-of-life. The study demonstrates how Oncor Electric Utility was able to use Vaisala’s online DGA monitor to help systematically monitor, then validate the issue and replace the transformer before it experienced any major operational failures or expose staff to safety risk. Additionally, the case provides insight into how important keeping a transformer performing well through its end-of-life is, proving the return on investment from a real-time online DGA monitor