Questions pertaining to Transformer DGA and Duval Triangle

In summary, the conversation discusses the topic of Power transformer DGA and Duval triangles and the implications of different regions on transformer health. The speaker has found information on the subject through Google, but has not been able to find a thorough explanation of what these regions mean for transformer health. They mention that Duval provides explanations and measurements on big power transformers. However, they are unable to view the link provided due to a firewall.
  • #1
EverGreen1231
78
11
Is anyone versed enough in Power transformer DGA and Duval triangles to know what the implications of the different regions might be? I've Googled and found many documents about the subject, but none really seem to mention what the implications might be for a transformer that tends towards T3 as apposed to T2 or T1; or what may cause a transformer to experience partial discharge. There are, of course, explanations of what these regions are, but no real in depth discussion of what they mean so far as transformer health.

Any help would be obliged.
 
Last edited:
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  • #2
Here are some explanations by Duval backed up by measurements on big power transformers
 
  • #3
zoki85 said:
Here are some explanations by Duval backed up by measurements on big power transformers
Thank you. I'll have to wait to view it on my home machine; it seems there's some type of firewall preventing me from seeing the link.
 

Related to Questions pertaining to Transformer DGA and Duval Triangle

1. What is a Duval Triangle in relation to Transformer DGA?

The Duval Triangle is a graphical representation of the analysis of dissolved gas analysis (DGA) data from a transformer. It is used to identify the type of fault that may be present in the transformer based on the levels and ratios of different gases found in the oil.

2. Why is DGA important in transformer maintenance?

DGA is an important tool for detecting potential issues in transformers. It can identify the presence of different types of faults, such as overheating, arcing, and partial discharges, which allows for timely maintenance and prevention of more serious damage.

3. How is DGA data collected from a transformer?

DGA data is collected by taking a sample of the transformer oil and analyzing it in a lab. The sample is typically taken from the bottom of the transformer where gases tend to accumulate. The analysis can also be done on-site using portable DGA equipment.

4. What gases are commonly monitored in DGA?

The most commonly monitored gases in DGA are hydrogen, methane, ethane, ethylene, acetylene, and carbon monoxide. These gases are produced as a result of different types of faults in the transformer and their levels and ratios can provide valuable information about the condition of the transformer.

5. How can the Duval Triangle be used for interpretation of DGA results?

The Duval Triangle is used for interpretation of DGA results by plotting the levels of different gases found in the transformer oil onto the triangle. The location of the plotted points can indicate the type of fault present in the transformer, allowing for informed decision-making regarding maintenance and repairs.

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