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Impulses
- Impulses overview
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Transformer manufacturers
- South America's champions of the energy transition
- Traction Transformers – Future on the Rail
- Time of the giants: XXL transformers for more power
- "Reinhausen is ready to deliver!"
- Oversized de-energized tap-changers
- The most powerful transformers in the world for a 1,100 kV HVDC line in China
- "We are in a growth market with the VRDT"
- Digitalization turnaround: GANZ Intelligent Solutions relies on cooperation with MR
- "Transitioning to a solution provider presents a major opportunity for transformer manufacturers – and digitalization can help!"
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Digitalization
- How AI can lend a hand
- myReinhausen: MR's central digital customer platform
- Why data centers (may) never fail
- Automation? (Cyber-) Secure!
- Globally unique: MESSKO® MTRAB® dehydrating breather communicates via cell phone app
- Remote Solutions: Professional help from a distance
- "Digitalization of the power grids will only work with comprehensive security measures"
- Why are you digitizing your transformers? Three questions for Rúnar Svavar Svavarsson.
- Six challenges, six solutions – Intelligent sensors for safe transformers
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Energy transition
- The VRDT is the ideal solution to solve voltage problems in our distribution grids
- Making transformers more sustainable
- 940 tons of power regulation
- Sunny prospects: Municipal solar storage devices
- Four reasons why regulated distribution grids are the future
- "The energy transition is taking place in the distribution grids"
- Five theses on the future of power grids
- Storage at all network levels
- Test systems for the energy revolution
- Climate change, energy revolution and the future of power grids?
- A new design for utility poles
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Wind and solar power
- The North Sea as Europe's green power plant
- Sahara electricity - safe for the island
- Are wind farms the new power plants?
- Direct current at all grid levels
- The MSCDN plant – the new "power plant generator" for stable grids
- Clean power grid with high-frequency filters
- Weatherproof cable testing for offshore wind parks
- VRDTs for Australia's distribution grids
- Lifetime optimization
- Power supply in industry
- Globalization
- Impulses overview
-
Transformer manufacturers
- South America's champions of the energy transition
- Traction Transformers – Future on the Rail
- Time of the giants: XXL transformers for more power
- "Reinhausen is ready to deliver!"
- Oversized de-energized tap-changers
- The most powerful transformers in the world for a 1,100 kV HVDC line in China
- "We are in a growth market with the VRDT"
- Digitalization turnaround: GANZ Intelligent Solutions relies on cooperation with MR
- "Transitioning to a solution provider presents a major opportunity for transformer manufacturers – and digitalization can help!"
-
Digitalization
- How AI can lend a hand
- myReinhausen: MR's central digital customer platform
- Why data centers (may) never fail
- Automation? (Cyber-) Secure!
- Globally unique: MESSKO® MTRAB® dehydrating breather communicates via cell phone app
- Remote Solutions: Professional help from a distance
- "Digitalization of the power grids will only work with comprehensive security measures"
- Why are you digitizing your transformers? Three questions for Rúnar Svavar Svavarsson.
- Six challenges, six solutions – Intelligent sensors for safe transformers
-
Energy transition
- The VRDT is the ideal solution to solve voltage problems in our distribution grids
- Making transformers more sustainable
- 940 tons of power regulation
- Sunny prospects: Municipal solar storage devices
- Four reasons why regulated distribution grids are the future
- "The energy transition is taking place in the distribution grids"
- Five theses on the future of power grids
- Storage at all network levels
- Test systems for the energy revolution
- Climate change, energy revolution and the future of power grids?
- A new design for utility poles
-
Wind and solar power
- The North Sea as Europe's green power plant
- Sahara electricity - safe for the island
- Are wind farms the new power plants?
- Direct current at all grid levels
- The MSCDN plant – the new "power plant generator" for stable grids
- Clean power grid with high-frequency filters
- Weatherproof cable testing for offshore wind parks
- VRDTs for Australia's distribution grids
-
Lifetime optimization
-
Power supply in industry
-
Globalization
- Portfolio
-
Career
-
Company
The Duval triangle explained in 3 minutes
The Duval triangle is one of the most famous methods to interpret DGA results. It can be used to categorize transformer faults, based on the relative amounts of methane, acetylene and ethylene.
There are lots of tutorials available, but most of them are longer than necessary. We want to do better. So here is our quick and dirty guide to the Duval triangle. You can read it in three minutes, we promise!
Example Case
Let's do an example. From a lab measurement we get the following DGA values:
- H2: 8 ppm
- CH4: 1313 ppm
- C2H2: 2908 ppm
- C2H4: 616 ppm
- C2H6: 420 ppm
- CO: 450 ppm
- CO2: 1069 ppm
We only need the values of C2H2, CH4 and C2H4. The other values are not used in the Duval triangle method.
Example Calculation
Example Calculation
The percentage of C2H2 is 2908/(2908 + 1313 + 616) = 0.601 = 60.1%.
The percentage of CH4 is 1313/(2908 + 1313 + 616) = 0.271 = 27.1%.
The percentage of C2H4 is 616/(2908 + 1313 + 616) = 0.127 = 12.7%.
The corresponding lines are drawn parallel to the labelling of the axes.
The point of intersection lies in the area called D1, meaning low energy discharge, or sparking.
Failure Codes
The complete list of failures codes can be seen here:
- PD: partial discharge
- T1: thermal fault below 300 degrees celcius
- T2: thermal fault between 300 and 700 degrees celcius
- T3: thermal fault above 700 degrees celcius
- D1: low energy discharge (sparking)
- D2: high energy discharge (arcing)
- DT: mixture of thermal and electrical faults
Note how every possible combination of DGA values will result in a failure classification. There is no area designated as normal.
The duval triangle can only be used for fault classification, but not for fault detection. In other words: Before doing any of this, be sure that your transformer is actually faulty.
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