Gases in Transformer's

Formation of Gases in Transformer's.

The Sample analysis of a Transformer oil is very helpful and predictive to analyze the present condition or health of Transformer .Different gases are formed during normal operation in all transformers and to find the quality of certain key gases ratio then it is easy for operator to predict the issues which is rise in the transformer. Dissolved gas analysis (DGA) is perform of the insulating oil and this analysis help to predict the health of a transformer. Due to some faults inside the transformer generate the gases .These gases generates misbehaver of electrical insulating material and the components that’s relate them. It is very important to verify the identity of these gases to prevent the maintenance problem of transformer.

The advantages of fault gas analyses

·          Advance warning of developing faults

·          Determining the improper use of units

·          Convenient scheduling of repairs

            Monitoring of units under overload 

Why we analyze the Dissolved Gases

A Doctor analyze the blood of patients to predict the disease and this analysis help the doctor to give him right medicine. In the same way the owner of Transformer analyze the dissolved gases in the dielectric fluid to find the problems in the transformer. Corona discharge, arcing in the transformer, localized overheating and general overheating are the major problems in the transformer. Generated gases are dissolved in transformer insulating oil to find the problem it is necessary to find the rate of generated gas and the total amount of key gas present in the transformer. If we find the composition of generated gas then we easily find the source of generated key gas and what kind of insulation is involved.

·         Combustible gas generation theory of transformer.

·         Gas Analysis interpretation.

·         Suggested operating procedures.

·         Dornenberg ratios, and Rogers ratios are diagnostic technique for key gases.

 Limitations:

A number of techniques are in market to find and measure the gases in the transformer. But it is important to note that the detection and measurement of these gases not a science but an art. To find the presence and significance  of gas its totally depend upon on the qualities of the measuring instrument like that the brand, geometry, degree of saturation of various gases in the oil and a number of more qualities.