Transformers Magazine, Vol. 13 No. SE1, 2026.
Izvorni znanstveni članak
Beyond Fixed Limits Baseline-driven, trend-focused Online DGA alarm strategy Part I
Dr Bhaba P. Das
Marius Grisaru
Sažetak
Across the various condition monitoring options available for transformer health, Online Dissolved Gas Analysis (ODGA) has become the go‑to early warning system. Yet too often, alarm logic still relies on static ppm thresholds that ignore a unit’s context, leading to nuisance alarms and operator fatigue. This article presents a practical, standards‑aligned methodology moving from fixed limits to transformer‑specific baselines, population statistics, and noise‑robust Rate‑Of‑Change (ROC) and explains how to cut false positives without compromising sensitivity. It draws on advice from IEC 60599, IEEE c57.104‑2019, CIGRE TB 771 & TB 783, and recent industry experiences.
Ključne riječi
DGA; online DGA; transformer condition monitoring; monitoring systems
Hrčak ID:
347231
URI
Datum izdavanja:
7.5.2026.
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