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project ppt

1. PROJECT PHASE II (EEC4990) Effect of Nanomaterial on electrical and thermal properties of insulating oil PROJECT SUPERVISIOR Prof. Asfar Ali Khan Prepared By Shubham Singh (18EEB212) Kapil Kumar Pali (18EEB167) Shahwar Haider (18EEB219)

2. INTRODUCTION Transformers are essential components of power system. Operating life depends on insulation system. Transformer failure due to insulation breakdown . Main Aim : To upgrade dielectrics property. How to do ? By adding nanopaticles in the insulating oil. So main motive of our project is to analyze how nanoparticles can enhance the dielectrics property of insulating oil .

3. What is Insulating Oil? Also known as transformer oil USES: Act as a coolant. It is used to preserve transformer’s core and windings. Suppress Corona Discharge. Stop arcing. Prevent oxidation of cellulose-made paper insulation..

4. Important Properties of Insulating oil High Breakdown Voltage High Flash Point Low Pour Point Low Viscosity

5. Selection of Nanoparticles Nano particles used : Fe 3 O 4 TiO 2 & FeCu The selection of nanoparticles is done purely on the basis of their ability to improve dielectric strength . Nanoparticle Specifications Parameters Fe 3 O 4 TiO 2 Size 50-110 nm 80-110 nm 100-130 nm Density 4.7 gm /cc 3.8 gm /cc 3.1 gm /cc Permittivity 80 80-100 100-130 Melting Point 1537 deg C 1800 deg C 1000 degC FeCu

6. Selection of Oil Oil used: Mineral Oil, Synthetic Ester & Natural Ester Specifications Parameters Mineral Oil Synthetic Ester Natural Ester Flash Point ( deg C) 160 260 260 Fire Point ( degC ) 170 316 350 Density ( gm /cc) 0.89 0.97 0.92 Water Content (mg/kg) <20 <50 <50 Pour Point ( degC ) -30 -56 -31 Breakdown Voltage (KV) >55 >75 >75

7. Preparation method One Step Method Two Step Method Two Step Method Most commonly used method Low cost and better compatibility In 500 ml solution , 450 ml pure oil and 50 ml of oleic acid Nanoparticle is dispersed in the oil using magnetic stirrer followed by ultrasonication . Configuration Used : S-S & M-M Ultrasonicator bath Sonification Magnetic Stirrer

8. Experimental Technique AC breakdown Voltage Experiment is carried out on a fully Automatic Oil breakdown voltage Tester which contains a chamber that holds oil sample and electrodes. Electrodes are made up of brass material having a 2.5 mm gap length with diameter of 10mm. Experiment is conducted on two different electrode configurations ie sphere-sphere and Mushroom-Mushroom. Nanofluid breakdown results in the formation of an arc between electrodes. AOBDV tester gives breakdown voltage with 1% accuracy. AC breakdown voltage tester

9. Statistical Analysis Determination of probability distribution of breakdown strength using Weibull distribution. Result comprises of 18 combinations (3 oils, 3 NPs, 2 configuration) Weibull density function consists of two parameters shape parameter(k) and scale parameter(c) which decide the voltage stress limit of insulator. Larger value of k represent small discreteness of population Graph between Weibull probability distribution (% ) and breakdown voltage (KV) for different NPs, oils and electrode configuration are plotted.

10. Results Higher breakdown voltage using M-M electrode configuration. Breakdown voltage increases on adding nano particles. Breakdown voltage decreases on further adding nanoparticles. Thermal conductivity increase on adding nano particles. TiO2 based synthetic ester oil posses highest breakdown voltage.

11. REFERENCES Suhaib Ahmad khan , Mohd . Tariq , Asfar Ali Khan, Basem Alamri , “Effect of Iron/Titanium based Nanomaterials on the Dielectric Properties of mineral oil, Natural and Synthetic Esters as Transformers Insulating fluid”,Nov . 30 2021. Furkan Ahmad , Asfar Ali Khan “Dielectric Performance of Magnetic Nanoparticles-based Ester oil” , IET Nanodielectrics , Feb. 2021 K. Karsai , D. Kerenyi , and L. kiss,Large Power Transformers, Amsterdam,The Netherlands :Elsevier,1987,pp.351-359. K.V. Wong and O.D. Leon , “Applications of nanofluids :Current and future,” Adv. Mech. Eng., vol.2,Jan.2010,art no. 519659. G. Donzelli , R. Cerbino , and A. Vailati , “ Bistable heat transfer in a nanofluid ,” Phys. Rev. Lett ., vol. 102, no. 10 , Mar 2019, Art no. 104503. X. Q. Wang and A.S. Mujumdar , “Heat transfer characteristics of nanofluids : A review,” Int. J. Therm Sci., vol. 46, no.1,pp. 1-19, 2007. M. Arruebo , R. Fernandez-Pacheco ,M. R. Ibarra, and J. Santamaria , “Magnetic nanoparticles for drug delivery,” Nano Today, vol. 2 , no.8, pp. 22-32,2007.

12. 5/15/2022