furan testing of transformers oil
DESCRIPTION
Furan Testing of Transformers Oil in TNEB Chennai (R&D Lab) Report.TRANSCRIPT
FURAN ANALYSES IN TRANSFORMER
PRESENTED BY:Nitish Kumar, Nutan Chandra, Muna
Kumar, Subhajit Bhandari .
Guided By: Er. A Kannan
Dr. M.G.R. UniversityEEE Department
SCOPE Analysis the 2-furtural and related furan
compounds during cellulosic insulation in mineral insulating oil samples.
analyzed by high performance liquid chromatography
(HPCL)
furan derivatives are extracted from the oil by use
of a extraction method such as liquid-liquid
extraction (method A) or solid-phase separation on silica cartridge (method B).
ABSTRACT:
To determine of the life of Transformer and the condition of Insulating Component furan test conduct.To Study the effect of oil reconditioning and oil replacement on the furan values.To Study the relationship between carbon die - oxide and furan compounds in power Transformers.
Introduction:The insulating system of a transformer consist of both
paper and oil.A transformer reaches the end of its life when its
insulation system totally lost its dielectric properties.Moisture is introduce into the system, and particle
accumulate in the oil.As the paper insulation ages, tensile strength decreases,
making the unit susceptible to winding failure during mechanical stresses such as vibration, through faults and short circuit.
Degradation of cellulosic materials produces CO and CO2 gases. These gases dissolve in oil, by extracting these gases and analyzing them, the paper insulation degradation can be assessed.
Construction of TransformerDefinition of Transformer: Electrical Power Transformer is a static device which transforms power from on circuit to
another without changing its frequency but may be in different voltage level.
Industrial transformer parts: Frame, enclosure, tank De-energized tap changer Dual-voltage switch Windings Core Control relays Cooling fans Pressure-relief Valve Air terminal chambers Nameplate or label
Production of Transformer oilTransformer oil is hydrocarbon product, mainly oil contains napthanic, parrafinic and aromatics.crude oil which is buried from earth crust.Clay treatment process on TOBS will give us the finished transformer oil.After the hot filtration operation transformer oil is ready for filling the transformers.
Types of Transformer OilGenerally there are two types of Transformer Oil used in transformer
1. Paraffin based Transformer Oil
2. Naphtha based Transformer Oil
Naphtha oil is more easily oxidized than Paraffin oil. Paraffin based oil obstruct the transformer cooling system. Although it has mentioned disadvantage but still in our country it is generally used because of its easy availability.
Various Type Of Oil Based On Colour
Type of test conducted on Transformer oil
Dissolved Gas Analyzer testBreak Down Voltage TestTan Delta & Resistivity TestTotal Acidity TestWater Content TestInter Facial Tension TestFuran Compounds Test.
WHAT IS FURAN? Furan is a hetero cyclic aromatic system consisting of 4 carbon and one oxygen in a five membered ring
Molecular formula is C4H4O
Structure of Furan Components
Insulation PaperEvaluation through DP
Degree of Polymerization (DP): A measure of length of cellulose chains
Value for fresh paper: 1000-1200
Value at End of life: 150-200
Paper InsulationMechanism of Degradation
Degradation is accelerated by temperature, water and oxygen
Degradation by-products are:Water and Carbon oxides
FuransAlcohols, acids and aromatic & aliphatic
hydrocarbons
INSTRUMENTATION
FLOW DIAGRAM OF HPLC INSTRUMENTATION
CASE STUDY THROUGH SAMPLING OILS
Case no :1 FOR LOW LEVEL PPB
5HMFL 2-FA 2-FO 2-AF 5-M2FAL TOTAL0
5
10
15
20
25
30
35
40
45
Transformer 1
Transformer 2
Transformer 3
Transformer 4
5HMFL 2-FA 2-FO 2-AF 5-M2FAL TOTAL0
200
400
600
800
1000
1200
1400
Transformer 1 Transformer 2Transformer3 Transformer 4Transformer 5 Transformer 6Transformer 7 Transformer 8Transformer 9 Transformer 10Transformer 11 Transformer 12Column1 Column2Transformer 15 Transformer 16Transformer 17 Transformer 18Transformer 19 Transformer 20Transformer 21 Transformer 22Transformer 23 Transformer 24Transformer 25 Transformer 26
CASE NO:2 MEDIUM LEVEL PPB
CASE NO:3 HIGH LEVEL PPB
5HMFL 2-FA 2-FO 2-AF 5-M2FAL TOTAL0
2000
4000
6000
8000
10000
12000
14000
Transformer 1Transformer 2Transformer 3Transformer 4Transfoermer 5Transformer 6Transformer7Transformer 8Transformer 9
Conclusion:
REWIND / REPLACE SOLID INSULATIONThis value are above shown data is available IEEE In INDIA value are under study conducted by CPRI
State of Transformer Oil Standard Value of PPBNormal 0 – 100Questionable 101 – 250Deteriorated 251 – 1000Low Reliability 1001.– 2500Rewind / Replace Solid Insulation >2500
The oil treatment is needed for keeping the transformer on good technical condition & helps to make better the solid and liquid insulation parameters.
18 & 19 March 2011 ICCCET 2011 - National College of Engineering 20