DEPARTMENTS
Dr. Preetha P.
Dr. Preetha P.

Professor

Office Address:

Professor, Department of Electrical Engineering, National Institute of Technology, Calicut, Kerala , India-673601

Email ID:

preetha@nitc.ac.in

Home Address:

  • B.Tech . N.S.S College of Engineering. Palakkad, Electrical & Electronics Engg., Calicut University., 1995.

  • PG Diploma in Thermal Power Plant Engineering,Regional Power Training Institute,Neyveli (NPTI Faridabad) 1997

  • M.E .High Voltage Engineerng, IISc Bangalore,2003

  • Ph.D Nanodielectrics,IISc Bangalore, 2013

  • Educational Qualifications

    • B.Tech . N.S.S College of Engineering. Palakkad, Electrical & Electronics Engg., Calicut University., 1995.

    • PG Diploma in Thermal Power Plant Engineering,Regional Power Training Institute,Neyveli (NPTI Faridabad) 1997

    • M.E .High Voltage Engineerng, IISc Bangalore,2003

    • Ph.D Nanodielectrics,IISc Bangalore, 2013

    Journals

    International Journal:(18)

    1. L. Tharamal, P. Preetha, T. K. Sindhu and N. Haque, "Classification of Transformer Oil Based on Ageing Severity Using Probabilistic Analysis of Partial Discharge Measurements," in IEEE Transactions on Power Delivery, vol. 39, no. 4, pp. 2424-2434, Aug. 2024, doi: 10.1109/TPWRD.2024.3414420.
    2. J. P. Varghese, N. Haque, R. Sunitha and P. Preetha, "Ageing Characteristics of Epoxy Nanocomposites doped with Silane functionalized Alumina Nanoparticles for High-Voltage Insulation Applications", IEEE Transactions on Dielectrics and Electrical Insulation, doi: 10.1109/TDEI.2023.3298871.
    3. Jacob, J., Preetha, P., Sindhu, T.K. and Rao, U.M., "Electrothermal and Mechanical Aspects of Thermally aged cellulose insulation impregnated with nanofluids" Measurement, Elsevier, Volume 209, March 2023, article id. 112506,https://doi.org/10.1016/j.measurement.2023.112506.
    4. Lakshmi Tharamal, Preetha P., Sindhu T K, "Assessing the Degradation of Transformer Oil from Partial Discharge Measurement Data using Histogram Similarity Measures" , Accepted for publication in IEEE Transactions on Instrumentation & Measurement, Vol. 71, pp. 1-10, 2022, Art no. 1006810, doi: 10.1109/TIM.2022.3205653
    5. Jacob P. Varghese, Akash M. Chandran, Prasanna Kumar S. Mural, R. Sunitha, P. Preetha, "Investigating the Characteristics of Amino Silane Functionalized Alumina Nanoparticles doped Epoxy Nanocomposite for High-Voltage Insulation",   IEEE Transactions on Nanotechnology, DOI: 10.1109/TNANO.2022.3172546, Vol. 21, pp 227-235.,May 2022
    6. Subhajit Maur, Soumya Chatterjee, Nasirul Haque, Preetha P., Sovan Dalai, Biswendu Chatterjee, "Sensing the thermal aging of epoxy alumina nanocomposites using electric modulus" based on isothermal relaxation current measurements", IEEE SENSORS Journal, Vol.21, No. 10, May 2021.
    7. Subhajit Maur, Nasirul Haque, Preetha Pottekat, Biswajit Chakraborty, Sovan Dalai, Biswendu Chatterjee,", Investigations on the effect of ageing on charge detrapping processes of epoxy alumina nanocomposite", IET Nanodielectrics, Vol. 3, Issue 4,PP116-123, October 2020.
    8. Avinash Nelson Asokan, P. Preetha and K. Sunitha, "Statistical Analysis of Electric Field Distribution in Insulating Nanodielectrics,"  IEEE Transactions on Dielectrics and Electrical Insulation. , Volume: 27 , Issue: 2 , April 2020, pp. 549 -558.
    9. Joyce Jacob, Preetha P. and Sindhu T K, "Review on natural ester and nanofluids as an alternative to transformer mineral oil", IET nanodielectrics, DOI: 10.1049/iet-nde.2019.0038.Online ISSN 2514-3255, Available online 17 April 2020.
    10. Joyce Jacob,P. Preetha and Sindhu T K, "Stability Analysis and Characterization of Natural Ester Nanofluids for Transformers,"   IEEE Transactions on Dielectrics and Electrical Insulation.Volume: 27,Issue 5, Oct. 2020,pp1715 - 1723
    11. Avinash Nelson Asokan, A. P. Anagha, P. Preetha and K. Sunitha, "Effect of Interphase on Dielectric Relaxation Mechanisms in Epoxy-Alumina Nanocomposite",  IEEE Transactions on Dielectrics and Electrical Insulation. Vol. 26, No. 4, August 2019, pp. 1211-1219.
    12. Mital Kumar Ladani and Preetha P., "Reduction of Electric Field Stresson the Surface Contour and at the Triple Junction in UHVAC GIS by Spacer Design optimization", International Journal of Emerging Electric Power Systems, 20(2), Jun. 2019, doi:10.1515/ijeeps-2018-0160.
    13. P. Preetha and Joy Thomas M., “Life Estimation of Epoxy Nanocomposites”, IEEE Transactions on Dielectrics and Electrical Insulation, Vol 21, No. 3, pp. 1154-1160, June 2014.
    14. P. Preetha, M. Joy Thomas and Rajeev Ranjan, “Electrothermal ageing of epoxy nanocomposites” IEEE Transactions on Dielectrics and Electrical Insulation. Vol. 19, No.6, pp. 2081-2089, December 2012.
    15. P. Preetha and M. Joy Thomas, “AC Breakdown Characteristics of Epoxy Nanocomposites”, IEEE Transactions on Dielectrics and Electrical Insulation. Vol. 18, Issue 5, pp. 1526-1534, October 2011.
    16. P. Preetha and M. Joy Thomas, "Influence of Nanofillers on the Surface Electrical Discharge Resistance of Epoxy Insulation Used in HV Power Apparatus," International Journal of Emerging Electric Power Systems, Vol. 12, Iss. 2, Article 1, pp.1-18, June 2011.
    17. P. Preetha and M. Joy Thomas, “Partial Discharge Resistant Characteristics of Epoxy Nanocomposites”, IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 18, Issue 1, February 2011, pp. 264-274.
    18. M K Sajina & P Preetha, “Analysis of Grid Connected System With Two Interconnected Microgrids”, International Journal of Electrical and Electronic Engineering & Telecommunications, Vol. 3, Issue 4, pp. 1-13,October 2014.

    Conferences

    International Conference: (28)

    1. Lavanya  Pradeep, Nasirul  Haque, Preetha P, "Estimation of Broadband Transfer Function of HFCT Using Time Domain Measurements," 2022 4th International Conference on Energy, Power and Environment (ICEPE), 2022, pp. 1-5, doi: 10.1109/ICEPE55035.2022.9797950.
    2. Joyce Jacob, B Vinod Kumar, Preetha P, Sindhu T K, "Thermal Modelling of Mineral Oil and Natural Ester Nanofluids", IEEE Conference on Electrical Insulation and Dielectric Phenomena 2021, December 12-15, 2021, Canada
    3. Lakshmi T., Preetha P., Sindhu T. K., " Statistical Analysis of the partial discharge data for the classification of transformer oil.",EEE Conference on Electrical Insulation and Dielectric Phenomena 2021, December 12-15, 2021, Canada

    4. Lakshmi Tharamal, Preetha P , Sindhu T K, "Predicting the Accuracy of Transformer Oil Classification by Goodness-of-fit Statistics",  IEEE CATCON December 2021.

    5. Divya P., Preetha P., "Influence of Nanoparticles on Surface Discharge in Epoxy Based Dielectrics", IEEE CATCON December 2021.

    6. Divya P., P. Preetha, "Influence of nanoparticles on electrical treeing in epoxy based dielectrics" , IEEE Tensymp, August 2021.
    7. Sreelakshmi S M, Lakshmi Tharamal, Preetha P., "Maximum likelihood classification for transformer fault diagnosis using dissolved gas analysis", IEEE Electrical Insulation Conference, June 2021.
    8.  Sarov Mohan S , Preetha P, "Prediction of AC Breakdown Voltage of Mineral Oil Nanofluid", IEEE Region 10 Conference TENCON, Osaka Japan, 16-19 November 2020. Virtual Edition
    9. Sarov Mohan S , Preetha P, "Optimization of Filler Loading of Multi-Particle Mineral Oil Nanofluid for Transformer Insulation", IEEE International Conference on Dielectrics 6th to 31st July 2020, Virtual Edition, Valencia (Spain).
    10. Vaishnavi Cheemala, Avinash Nelson Asokan, Preetha P, "Transformer Incipient Fault Diagnosis using Machine Learning Classifiers", IEEE CATCON at IIT Madras November 21-23, 2019.
    11. Kuber Kumar, Preetha P, Sovan Dalai, Biswendu Chatterjee, "Condition Assessment of Epoxy Nanocomposites Using Polarization and Depolarization Current", IEEE CATCON at IIT Madras, November 21-23, 2019.
    12. Joyce Jacob, Preetha P, Sindhu T K, “Compatibility Study of Paper and Epoxy with Natural Ester- A Substitute for Transformer Mineral Oil,” IEEE TENCON 2019, Kochi. October 2019.
    13. Jacob P Varghese, Avinash Nelson Asokan, Shubham Khatua, Preetha P , Sunitha R, “Electric Field Stress Optimization of Permittivity Graded Spacer in UHVAC Gas Insulated System,” IEEE TENCON 2019, Kochi. October 2019.
    14. Avinash Nelson Asokan, Jacob P Varghese, Joyce Jacob, Preetha P and Sunitha K,” Dielectric characteristics of epoxy alumina nanocomposites with Cole-Cole plot,” IEEE Region 10 Symposium TENSYMP 2019, Kolkata. June 2019.
    15. Shubham Khatua, Preetha P, “Effect of Surface charge accumulation on electric field computation in CO2 filled GIS,” IEEE Region 10 Symposium TENSYMP 2019, Kolkata. June 2019.
    16. Joyce Jacob, Dhanya S, Lakshmi Tharammal, Avinash Nelson A, Preetha P, “Partial discharge characteristics of nanofilled mineral oil,” IEEE Region 10 Symposium TENSYMP 2019, Kolkata. June 2019.
    17. Lavanya Pradeep, Avinash Nelson and Preetha.P, “Effect of interphase permittivity on the electric field distribution of epoxy nanocomposites”, International Conference On Inventive Research In Material Science And Technology (ICIRMCT) 2018, Coimbatore, March 23-25,2018.
    18. Afseena A, Joyce Jacob, and Preetha P, "Temperature Dielectric Spectrum Analysis of Soybean Ester Nanofluid, Mineral Oil and Soybean Ester Impregnated-PapersIEEE International Conference on Control, Power Communication and Computing Technologies (ICCPCCT – 2018), Kannur, March 23-25,2018.
    19. Joyce Jacob, Dhanish Mon N., Preetha P. “Experimental Validation of Thermal Model of Unfilled and Nanofilled Transformer Oils”, 9th IEEE PES Asia -Pacific Power and Energy Engineering Conference 2017, Bangalore, 8-10 November 2017.
    20. Anagha Paleri, Preetha P, Sunitha K “Frequency Response Analysis (FRA) in power transformers: An approach to locate inter-disk SC fault”,9th IEEE PES Asia -Pacific Power and Energy Engineering Conference 2017, Bangalore, 8-10 November, 2017.
    21. Kamaljith and Preetha P., " Fault Diagnosis of Power Transformer Using Frequency Response Analysis", First International Conference on Advanced Materials for Power Engineering, Kottayam, Kerala, 11-13 December 2015.
    22. Sanalkrishnan and Preetha P., "Electric Field Analysis of 220kV Outdoor Polymeric Insulator with Surface Contaminations", First International Conference on Advanced Materials for Power Engineering, Kottayam, Kerala, 11-13 December 2015.
    23. Avinash Nelson, Preetha P. and Sunitha K., "Dielectric Characteristics of Epoxy Alumina Nanocomposite based on Impedance Spectroscopy, First International Conference on Advanced Materials for Power Engineering, Kottayam, Kerala, 11-13 December 2015.
    24. P. Preetha and M. Joy Thomas, "Accelerated multistress aging of polymer nanocomposites and its condition monitoring”, IEEE International Conference on Condition Monitoring and Diagnosis, Bali, Indonesia, September 23-27, 2012.
    25. P. Preetha and M. Joy Thomas, “AC breakdown characteristics of epoxy alumina nanocomposites”, IEEE Annual Report Conference on Electrical Insulation and Dielectric Phenomena, West Lafayette, October 17-20, 2010, pp. 1-4
    26. P. Preetha and M. Joy Thomas, “Partial discharge resistant characteristics of alumina filled polymer nanocomposites”, 16th International Symposium on High Voltage Engineering (ISH-2009), International Convention Center, Cape Town, 24th – 28th August 2009,  pp.145-150.
    27. P. Preetha, Sridhar Alapati, S. Singha, B. Venkatesulu and M. Joy Thomas, “Electrical Discharge Resistant Characteristics of Epoxy Nanocomposites” IEEE Annual Report Conference on Electrical Insulation and Dielectric Phenomena, Quebec City, Canada, October 26-29, 2008, pp 718-721.
    28. P. Preetha, M. Joy Thomas, S. Senthil Kumar, M. N. Narayanachar, “Characteristics of partial discharge pulses in compressed SF6- N2 mixtures”, XIIIth International Symposium on High Voltage Engineering, Netherlands, August 25-29, 2003, pp.

      National Conference (10)

    1. Patturu Pradeep, Joyce Jacob, Preetha P and Sindhu T.K, “Preparation of stable nanofluid for transformer insulation”, Second National Power Engineering Research Scholars Conference (NPERSC), IIT Madras, February 24-25,2018.
    2. Dhanish Mon N, Avinash Nelson and Preetha P., “Thermal Modeling of Nanofilled Transformer Oil”, National Conference on High Voltage Engineering & Technology (NCHVET2017), CPRI Bangalore, 27-28 January 2017.
    3. Anagha A P, Avinash Nelson, Preetha P., “Analysis of Interface in Epoxy-Alumina Nanocomposites”, National Conference on High Voltage Engineering & Technology (NCHVET2017), CPRI Bangalore, 27-28 January 2017.
    4. Anagha Paleri, Preetha P. and Sunitha K, “Location of Inter-Disc Short Circuit Fault in Power Transformer Using Frequency Response Analysis (FRA)”, National Conference on High Voltage Engineering & Technology (NCHVET2017), CPRI Bangalore, 27-28 January 2017.
    5. Jithin T M, Preetha P. and Sunitha K , “Electric Field Analysis of Y-Type Insulator String used in ±800kV HVDC Line”, National Conference on High Voltage Engineering & Technology (NCHVET2017), CPRI Bangalore, 27-28 January 2017.
    6. Kamaljith.K.E and Preetha P., “Disc Fault Analysis of Power Transformer Using Frequency Response Analysis (FRA)”, National Conference on High Voltage Engineering & Technology (NCHVET2017), CPRI Bangalore, 27-28 January 2017.
    7. Basil M. T. and Preetha P., “Modeling of a 1.2 kW Proton Exchange Membrane Fuel Cell”, Innovative Emerging Strategies in Power Energy and Control (INSPEC 13), March 2013.
    8. Sajina M. K., Preetha P., “Simulation and Analysis of a Photovoltaic Microgrid”, National Conference on Energy and Environment Management (EEM), January 2012.
    9. P. Preetha and S. Ashok, “Performance Comparison of Electromechanical and Electronic Energy Meter”, National Conference on Electrical Systems and Control Technologies (ESCT), May 5-7, 2007.
    10. R. Sreerama Kumar, P. Preetha, “Steady State Analysis of Wind Turbine Driven Induction Generator”, IEEE Conf. on Renewable Energy Sources for Generation of Electricity, Pune, September 2001, pp. 84-89.  

    1. Interphase characterization-Solid Nanodielectrics- Mr. Avinsh Nelson Asokan ( Completed- Degree Awarded October 2021)

    2. Development of an alternative for mineral oil used in transformers- Ms. Joyce Jacob ( Completed)

    3. INVESTIGATING THE EFFECTS OF SURFACE FUNCTIONALIZATION ON THE PERFORMANCE AND AGING OF EPOXY ALUMINA NANOCOMPOSITES - Mr. Jacob  P Varghese (Completed)

    4. Intelligent Monitoring of Power Transformers using Partial Discharge Measurements on Transformer Oil -Ms Lakshmi Tharamal (Completed)

    5. Condition monitoring of power equipment -Ms Lavanya (Co Guide)-)ongoing

    6. Condition Assessment of bushings- Mrs Anna (Part time) ongoing

    1. KSCSTE sponsored project on "Development of an alternate fluid to transformer mineral oil", Rs 5.7 Lakhs

    2. TEQIP II sponsored project on "Preparation of polymer nanocomposites for interphase characterization", Rs 1 lakh

    3. TEQIP II sponsored project on "Dielectric Characterization of Solid Dielectric Materials using Impedance Analyser", Rs 3.36 lakhs

    4. Faculty Research Project on "Investigation on the performance of Electronic Energy Meter under non linear loads"         Rs 35000/-.

    5.  Faculty Research Project on "Development of optimal pico-hydel generator for rural areas", Rs 45,000/-.

    1. PhD Thesis Examiner- Anna University, JNTU.

    2. Comprehensive Viva Examiner-KTU

    3. Question Paper Setter-Vivekananda college of Engg for Women,Tiruchengode

    3. MS Thesis Examiner-IISc Bangalore

    4. Reviewer- Journals- IJEEPS,IET

                   Conferences-SPICES 2017,2019, TENCON 2019, NPSC

    Administrative Activities.

    1. HoD ,EED-from January 6, 2022 to January 7, 2024 

    2. Warden Ladies Hostel- from August 2019 -August 2021

    3. Finance Chair-IEEE CATCON 20219 December 3-5

    4. Registration Committee Chair-IEEE SPICES 2015

    Academic Activities

    1.Programme Coordinator. M Tech HVE- ( 2014 ,2015, 2016, 2019 ,2021 Admission)

    2. Faculty Incharge of Examination Cell-(2012-2019)

    3. Department Library In Charge- 2019 -2021

    4. Faculty Advisor Coordinator- B Tech 2012 Admission , 2016 admission and 2020 admission

    5. Faculty In Charge- HV lab

    6. Session Chair-IEEE SPICES 2015 NIT Calicut, IEEE CATCON 2021(3-5 December)

    7.Class Committee Chairman-First Year B Tech,First, second and Third Session, 2020-21

    1. Presented Paper at IEEE International Conference on Condition Monitoring and Diagnosis, Bali, Indonesia, 23-27 September 2012.

    2. Attended  QIP Short Term Training on “Challenges, Opportunities, and Emerging Trend in the Field of High Voltage and Electrical Insulation” from 1-6th February 2021 IITBHU

    3. Attended the Short Term Training on "Diagnostics of High Voltage insulation" Conducted by IIT Kanpur online from1-6 March 2021

    1.Lecture delivered on “Life estimation of polymer nanocomposites using graphical method and Least square regression technique"  in the online Faculty Development Programme on “Recent Computational Strategies for Condition Monitoring of High Voltage Equipment (ReCoSCoM-HiVoE-2021)” jointly organized by Electrical Engineering Department and Electronics & ICT Academy, NIT Patna from 18th September to 24th September 2021.  Date :   22-September-2021

    2. Lecture Deivered on " Introduction to Life Estimation of Polymer Nanocomposites", in FDP on Recent Advances in Condition Monitoring of Power Equipment organised by EED of NIT Calicut from 25th to30th January 2021.

    3. Lecture Delivered on Partial Discharge Maesurements" , in FDP on Recent Advances in Computational Electromagnetics and signal processing tools for high voltage applications, 15-03-2021-19-03-2021.

    4. LECTURE Delivered on Recent Trends and Future Perspectives in Electrical Insulation in ATAL Sponsored FDP on State of the Art Applications and Resaerch Areas in High Voltage Engineering. July 5-9, 2021

    5. Lecture delivered in SERB sponsored karyashala on Recent Advances in High Voltage Engineering and Insulation , on the topic, Partial discharge for condition monitoring of power equipment, July 18-24 , 2022

    1.FDP ON "Advanced Condition Monitoring Methods for Power Equipment", from 09-07-2018 to 14-07-2018, Sponsored by TEQIP PHASE II

    2. .FDP ON "Recent Trends and Applications of High Voltage Engineering." from 22-06-2014 to 28-06- 2014, Sponsored by TEQIP Phase II

    3. FDP on "Power Quality and Custom Power under Deregulated Power System"from 20-12-2004 to 02-01-2005 Sponsored by MHRD.

    4. Two day workshop pn "Electromagnetic Analysis, EMI, EMC Analysis, PCB, Multiphysics,26-10-2016- 28-10-2016"by ENTUPLE TECHNOLOGIES

    5. FDP on "Recent Advances in Condition Monitoring of Power Equipment, RACMPE 2021",  25th to 30th January 2021

    6.ATAL Sponsored FDP on RAHVE( State of the Art Applications and Research Areas in High VoltageEngineering,July 5-9,2021.

    7. Organised IEEE CATCON conference from 3-5 December 2021, as Finance Chair

    7. SERB  Sponsored  High-End workshops Under Karyashala scheme -Recent Trends in High Voltage Engineering and Insulation Diagnostics (RTHVID 2022) 18th to 24th July 2022.

    PG 2020 Admission

    1. Aqueena Joseph M200505EE-PREDICTION OF THERMAL CHARACTERISTICS OF NANOFLUIDS

    2. Manish Kumar-M200181EE-Health Index Analysis of XLPE Cable Insulation using Machine Learning Technique

    3. Alok Kumar-M200180EE-COMPATIBILITY STUDY OF TRANSFORMER CONSTRUCTION MATERIALS WITH NATURAL ESTER BASED NANOFLUID

    PG 2021 Admission

    1. Appukumar

    2. Samarth

    3. Ankita

    4. Ankit

    1. ZZ1003D Basic Electrical Science ( B Tech - Winter Semester 2018-19)

    2. EE6504D Physics of Dielectrics ( M Tech High Voltage Emgg., Winter 2018-19)

    3. EE 2005D Electrical Measurements( III Sem B Tech, Monsoon Semester 2019)

    4. EE6591D High Voltage Lab( I PG High Voltage, Monsoon 2019)

    5. Electrical Engineering Drawing

    6. Electric Power Utilisation

    7. Illumination Engineering

    8. Special Machines and Linear Machines

    9. Electrical Measurements and Machines

    10.Electrical Machines II

    Winter Semester 2021-22

    EE 6504D Physics of Dielectrics

    Monsoon Semester 2022-23

    EE2005D Electrical Measurements- A Batch 

    Winter Semester 2023-24

    EE6504D Physics of Dielectrics

    EE2005D Electrical Machines I

    Liquid Nanodielectrics

    SF6-Nmixtures for GIS
    HV DC Systems
    Switchgear and Protection

    High Volatge engneering

    Nanodielectric Applications

    Condition monitoring of power equipment

    Nanofluids 

    Partial Discharge Characteristics in compressed SF6 , N2 &SF6-N2 gaseous media

    POSOCO Award for the best Ph D Thesis( ranked in top ten) in  2014

    Prof. D J Badkas gold medal for the best PhD Thesis in Electrical Engineering Department -Indian Institute of Science Bangalore (2013-14)

    IEEE Bangalore section publication award 2014 for the paper "Life Estimation of Electrothermally Stressed Epoxy Nanocomposites"

    Annual Member, ISTE

    IEEE Senior member

    DEIS Member