How Does Oil Chromatography Analysis (DGA) Act As A Transformer 'Physician'

nvisible Guardian: How Does Oil Chromatography Analysis (DGA) Act as a Transformer 'Physician'?  

Do you know?   Every oil immersed transformer in operation has its internal insulation oil like a 'blood sample', recording the health status of the equipment.   Oil chromatography analysis (DGA) is such a cutting-edge "medical examination technology" that can issue accurate warnings by analyzing trace fault characteristic gases dissolved in the oil before a fault occurs.

How does DGA "solve cases"?   ——Listen to 'qi' to identify faults

When there is a latent fault inside the transformer, specific gases will be generated and dissolved:

Hydrogen (H ₂): An important indicator of corona discharge and local overheating.

Methane (CH ₄), Ethane (C ₂ H ₆), Ethylene (C ₂ H ₄): Characteristic gases of thermal decomposition of insulating oil at different temperatures.

Acetylene (C ₂ H ₂): the "exclusive signal" of arc discharge, is a highly dangerous fault sign.

By accurately analyzing the types, concentrations, and gas production rates of these gases, we can infer the hidden "conditions" inside like detectives.

Core Technology: "Three Ratio Method" Diagnosis

This is an internationally recognized diagnostic password.   By calculating the ratios of three key gases, CH ₄/H ₂, C ₂ H ₆/CH ₄, and C ₂ H ₄/C ₂ H ₆, and inputting them into the standard coding library, the fault type can be accurately determined as:

✔️  Low temperature overheating (such as poor contact)

✔️  High temperature overheating (such as magnetic circuit overheating)

✔️  Partial discharge or arc discharge

DGA makes predictive maintenance a reality, helping you transition from "repair after failure" to "intervention before failure", avoiding catastrophic power outages and equipment damage.   It is the smartest "invisible guardian" to ensure the safety of the power grid.

Practice makes perfect!   Have you ever successfully alerted to an internal fault in a transformer using DGA technology?