Topic hub
DGA and Condition Monitoring for Power Transformers
A GridAPM topic hub linking dissolved gas analysis, online DGA monitoring, Duval triangle and gas-ratio interpretation, failure-mode diagnostics, and human-reviewed condition-based maintenance for transformer fleets.
Dissolved gas analysis is the backbone of transformer condition monitoring: online and offline DGA, trend and generation-rate analysis, Duval triangle and gas-ratio interpretation, and failure-mode diagnostics build a health picture that engineers must be able to review before any maintenance or replacement decision.
Curated resources
Where to start.
A short, hand-picked path into this topic: guides, interactive tools, and solution pages.
Guide
DGA Trend Analysis
Why single-sample DGA is not enough, and how to read gas movement as a trend.
Guide
Online DGA Monitoring for Failure Prevention
How continuous DGA shortens the time from a gas change to a reviewed decision.
Guide
Duval Triangle and Gas-Ratio Interpretation
The Duval triangle, IEC 60599 / Rogers ratios, and the key-gas method, explained.
Guide
DGA Monitoring for Transformer Fleets
Scaling DGA from a single transformer to fleet-wide condition intelligence.
Guide
Power Transformer Failure Modes and Diagnostics
How transformers fail, and which diagnostic catches each failure mode early.
Guide
DGA Generation-Rate Analysis
Why the rate of gas generation matters as much as the absolute level.
Guide
Condition-Based vs Time-Based Maintenance
When condition evidence should drive maintenance instead of the calendar.
Guide
Explainable Health Index for Power Transformers
Turning diagnostics into a transparent, reviewable transformer health score.
Guide
2026 Power Transformer Fleet Intelligence Report
The aging-fleet, lead-time, and demand pressures behind condition monitoring — fully cited.
Interactive tool
Interactive DGA Analyzer
Run Duval, gas ratios, and IEEE C57.104 screening on a sample, entirely in your browser.
Solution
Online DGA Monitoring Software
The solution page: evidence model, review gates, and pilot scope.
Standard
IEEE C57.104 for DGA Evidence
The standard framing DGA interpretation for mineral-oil transformers.
Standard
IEC 60599 for Transformer Gas Evidence
Interpretation of dissolved and free gases — the international DGA reference.
Buyer path
From research topic to pilot workflow.
Each topic should connect to a practical GridAPM evaluation: which evidence is available, which decision is hard today, who reviews the recommendation, and what output the team needs to trust.
- Intake
- Correlate & quality gate
- Agent reasoning
- Engineer sign-off
- Work package & report
Platform architecture
See modules, agents, evidence model, health index, lifecycle context, and reporting.
Data readiness
Map DGA, PRPD, SFRA, thermal, inspection, maintenance, historian, and enterprise data.
Pilot evaluation
Define scope, evidence inputs, timeline, success metrics, and deliverables.
FAQ
Questions buyers actually ask.
What is dissolved gas analysis (DGA), and why does it matter for transformers?
DGA measures the gases dissolved in a transformer's insulating oil, which carry the chemical signature of developing thermal and electrical faults. Because those gases appear before a fault becomes a failure, DGA is the primary early-warning test in transformer condition monitoring — most useful read as a trend with operating context, not as a single-sample verdict.
How does GridAPM use DGA and condition-monitoring evidence?
GridAPM assembles DGA trends, gas-ratio and Duval interpretation, oil and thermal context, and asset history into a source-linked case, flags what is missing or contradictory, and routes a draft recommendation to a qualified engineer for approval. It does not diagnose autonomously or act on energized assets.
Test the workflow on your own fleet.
An eight-week pilot runs on your approved evidence, with your engineers keeping sign-off authority at every step.