Dissolved Gas Analysis Method
FINAL YEAR PROJECT 1
PROGRESS REPORT 1
AUTHOR’S NAME : Ruban s/o Paramasivam
STUDENT ID : EP083765
REPORTING PERIOD : 18TH JUNE 2012 - 15TH JULY 2012
SUPERVISOR’S : Mr. John Steven
NAME
PROJECT TITLE : Dissolved Gas Analysis in determining Transformer Faults
SUBMISSION DATE : 16TH JULY 2012
1.0 Background of Studies
Oil sampling analysis is a useful, predictive, maintenance tool for determining transformer health. DGA is identified as one of the sufficient method of oil sampling in evaluating transformer health. The breakdown of electrical insulating material inside the transformer generates gases within the transformer. The identity of gases being generated is useful in any preventive method maintenance program. DGA method involves oil sampling method and testing the sample to measure the concentration of the dissolved gases.
The two typical principal cause of gas formation within an operating transformer are electrical disturbance and thermal decomposition. All transformers generate gasses to some extent at normal operating temperature. Insulating mineral oils for transformer are mixtures of many different hydrocarbons and the decomposition process for these hydrocarbons are complex. During this process, active hydrogen atoms and hydrocarbons fragments are formed. These fragments can combine with each other to form gasses such as Hydrogen (H2), Methane (CH4),
Acetylene (C2H2), Ethylene (C2H4), Ethane (C2H6) and many more. The gasses listed are considered combustible. The rate at which each gas are produced depends on the temperature. Therefore, the concentration of the individual dissolved gasses found in transformer insulating oil may be used directly to evaluate the transformer and suggest any faults within the transformer.
After samples have been taken and analysed, the first step in evaluating DGA result is to consider the concentration level of each gasses. Basically, any
PROGRESS REPORT 1
AUTHOR’S NAME : Ruban s/o Paramasivam
STUDENT ID : EP083765
REPORTING PERIOD : 18TH JUNE 2012 - 15TH JULY 2012
SUPERVISOR’S : Mr. John Steven
NAME
PROJECT TITLE : Dissolved Gas Analysis in determining Transformer Faults
SUBMISSION DATE : 16TH JULY 2012
1.0 Background of Studies
Oil sampling analysis is a useful, predictive, maintenance tool for determining transformer health. DGA is identified as one of the sufficient method of oil sampling in evaluating transformer health. The breakdown of electrical insulating material inside the transformer generates gases within the transformer. The identity of gases being generated is useful in any preventive method maintenance program. DGA method involves oil sampling method and testing the sample to measure the concentration of the dissolved gases.
The two typical principal cause of gas formation within an operating transformer are electrical disturbance and thermal decomposition. All transformers generate gasses to some extent at normal operating temperature. Insulating mineral oils for transformer are mixtures of many different hydrocarbons and the decomposition process for these hydrocarbons are complex. During this process, active hydrogen atoms and hydrocarbons fragments are formed. These fragments can combine with each other to form gasses such as Hydrogen (H2), Methane (CH4),
Acetylene (C2H2), Ethylene (C2H4), Ethane (C2H6) and many more. The gasses listed are considered combustible. The rate at which each gas are produced depends on the temperature. Therefore, the concentration of the individual dissolved gasses found in transformer insulating oil may be used directly to evaluate the transformer and suggest any faults within the transformer.
After samples have been taken and analysed, the first step in evaluating DGA result is to consider the concentration level of each gasses. Basically, any