Govindasamy Tamizhmani

Assoc Research Professor

  • 1185 Citations
  • 15 h-Index
1986 …2022
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Research Output 1986 2018

2018

Accelerated testing of module level power electronics for long-term reliability

Flicker, J., Tamizhmani, G., Moorthy, M. K., Thiagarajan, R. & Ayyanar, R., May 25 2018, 2017 IEEE 44th Photovoltaic Specialist Conference, PVSC 2017. Institute of Electrical and Electronics Engineers Inc., p. 1-6 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Power electronics
Thermal cycling
Testing
Durability
Experiments

A comprehensive study of 18-19 years field aged modules for degradation rate determination along with defect detection and analysis using IR, EL, UV

Ali, S., Ali, A., Saher, S., Agha, H. S., Bin Abdul Majeed, H., Mahmood, F. I. & TamizhMani, G. S., Mar 9 2018, Proceedings of 2018 15th International Bhurban Conference on Applied Sciences and Technology, IBCAST 2018. Institute of Electrical and Electronics Engineers Inc., Vol. 2018-January, p. 28-35 8 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Imaging techniques
Degradation
Discoloration
Fluorescence
Radiation

A novel technique for performing PID susceptibility screening during the solar cell fabrication process

Oh, J., Dahal, S., Dauksher, B., Bowden, S., Tamizhmani, G. & Hacke, P., May 25 2018, 2017 IEEE 44th Photovoltaic Specialist Conference, PVSC 2017. Institute of Electrical and Electronics Engineers Inc., p. 1-4 4 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Solar cells
Screening
Fabrication
Degradation
Antireflection coatings
3 Citations

A status review of photovoltaic power conversion equipment reliability, safety, and quality assurance protocols

Hacke, P., Lokanath, S., Williams, P., Vasan, A., Sochor, P., TamizhMani, G. S., Shinohara, H. & Kurtz, S., Feb 1 2018, In : Renewable and Sustainable Energy Reviews. 82, p. 1097-1112 16 p.

Research output: Contribution to journalReview article

Quality assurance
Testing
Durability
Costs
Bias voltage

Automation of risk priority number calculation of photovoltaic modules

Moorthy, M. K. & Tamizhmani, G., May 25 2018, 2017 IEEE 44th Photovoltaic Specialist Conference, PVSC 2017. Institute of Electrical and Electronics Engineers Inc., p. 1-6 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Automation
Spreadsheets
Defects
Risk analysis
Degradation

Comparative study of 28 and 18 years field aged siemens-arco M55 modules in temperate and hot-dry climates

Chicca, M., Wohlgemuth, J. & Tamizhmani, G., May 25 2018, 2017 IEEE 44th Photovoltaic Specialist Conference, PVSC 2017. Institute of Electrical and Electronics Engineers Inc., p. 1-6 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Degradation
Spectroscopy
Quantum efficiency
Inspection
Glass

Defect and safety inspection of 6 PV technologies from 56,000 modules representing 257,000 modules in 4 climatic regions of the United States

Tatapudi, S., Libby, C., Raupp, C., Srinivasan, D., Kuitche, J., Bicer, B. & Tamizhmani, G., May 25 2018, 2017 IEEE 44th Photovoltaic Specialist Conference, PVSC 2017. Institute of Electrical and Electronics Engineers Inc., p. 1-5 5 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Inspection
Defects
Monocrystalline silicon
Polysilicon
1 Citations

Degradation rate evaluation of multiple PV technologies from 59,000 modules representing 252,000 modules in four climatic regions of the United States

Raupp, C., Libby, C., Tatapudi, S., Srinivasan, D., Kuitche, J., Bicer, B. & Tamizhmani, G., May 25 2018, 2017 IEEE 44th Photovoltaic Specialist Conference, PVSC 2017. Institute of Electrical and Electronics Engineers Inc., p. 1-6 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Power plants
Cadmium telluride
Degradation
Monocrystalline silicon
Gallium

Effect of spatial temperature uniformity on outdoor photovoltaic module performance characterization

Umachandran, N. & Tamizhmani, G., May 25 2018, 2017 IEEE 44th Photovoltaic Specialist Conference, PVSC 2017. Institute of Electrical and Electronics Engineers Inc., p. 1-7 7 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Temperature
Temperature distribution
Simulators
Air
Hot Temperature

Quantification of Environmental Effects on PV Module Degradation: A Physics-Based Data-Driven Modeling Method

Subramaniyan, A. B., Pan, R., Kuitche, J. & TamizhMani, G., Sep 1 2018, In : IEEE Journal of Photovoltaics. 8, 5, p. 1289-1296 8 p., 8410667

Research output: Contribution to journalArticle

Environmental impact
Data structures
Physics
modules
degradation

Reduction of PV Module Temperature Using Thermally Conductive Backsheets

Oh, J., Rammohan, B., Pavgi, A., Tatapudi, S., Tamizhmani, G., Kelly, G. & Bolen, M., Jun 19 2018, (Accepted/In press) In : IEEE Journal of Photovoltaics.

Research output: Contribution to journalArticle

polyvinyl fluoride
modules
operating temperature
polyesters
Temperature

Regional soiling stations for PV: Soling loss analysis

Tamizhmani, G., King, B., Venkatesan, A., Deline, C., Pavgi, A., Tatapudi, S., Kuitche, J., Chokor, A. & Asmar, M. E., May 25 2018, 2017 IEEE 44th Photovoltaic Specialist Conference, PVSC 2017. Institute of Electrical and Electronics Engineers Inc., p. 1-6 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Rain
Dust
Time series
Atmospheric humidity
2017
5 Citations

Further studies on the effect of SiNx refractive index and emitter sheet resistance on potential-induced degradation

Oh, J., Dauksher, B., Bowden, S., Tamizhmani, G., Hacke, P. & D'Amico, J., Mar 1 2017, In : IEEE Journal of Photovoltaics. 7, 2, p. 437-443 7 p., 7814277

Research output: Contribution to journalArticle

Sheet resistance
Refractive index
emitters
refractivity
degradation

Mitigation of PID in commercial PV modules using current interruption method

Bora, B., Oh, J., Tatapudi, S., Sastry, O. S., Kumar, R., Prasad, B. & TamizhMani, G., Jan 1 2017, Reliability of Photovoltaic Cells, Modules, Components, and Systems X. SPIE, Vol. 10370, 03700D

Research output: Chapter in Book/Report/Conference proceedingConference contribution

interruption
Degradation
modules
degradation
Glass

Temperature coefficient of power (Pmax) of field aged PV modules: Impact on performance ratio and degradation rate determinations

Mahmood, F., Majeed, H., Agha, H., Ali, S., Tatapudi, S., Curtis, T. & TamizhMani, G., Jan 1 2017, Reliability of Photovoltaic Cells, Modules, Components, and Systems X. SPIE, Vol. 10370, 1037008

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Degradation
modules
degradation
Module
Coefficient
2016
2 Citations

Accelerated Testing of Module-Level Power Electronics for Long-Term Reliability

Flicker, J., Tamizhmani, G., Moorthy, M. K., Thiagarajan, R. & Raja Ayyanar, A., Nov 10 2016, (Accepted/In press) In : IEEE Journal of Photovoltaics.

Research output: Contribution to journalArticle

Power electronics
modules
Testing
Thermal cycling
electronics
2 Citations

A novel technique for performing PID susceptibility screening during the solar cell fabrication process

Oh, J., Dahal, S., Dauksher, B., Bowden, S., Tamizhmani, G. & Hacke, P., Nov 18 2016, 2016 IEEE 43rd Photovoltaic Specialists Conference, PVSC 2016. Institute of Electrical and Electronics Engineers Inc., Vol. 2016-November, p. 907-910 4 p. 7749741

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Solar cells
Screening
Fabrication
Degradation
Antireflection coatings
3 Citations

Automation of risk priority number calculation of photovoltaic modules

Moorthy, M. K. & Tamizhmani, G., Nov 18 2016, 2016 IEEE 43rd Photovoltaic Specialists Conference, PVSC 2016. Institute of Electrical and Electronics Engineers Inc., Vol. 2016-November, p. 1730-1735 6 p. 7749920

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Automation
Spreadsheets
Defects
Risk analysis
Degradation
3 Citations

Climatological relevance to the soiling loss of photovoltaic modules

Naeem, M. & Tamizhmani, G., Apr 7 2016, 2015 Saudi Arabia Smart Grid, SASG 2015. Institute of Electrical and Electronics Engineers Inc., 7449280

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Rain
Dust
Cleaning
Atmospheric humidity
Experiments
1 Citations

Comparative study of 28 and 18 years field aged Siemens-Arco M55 modules in temperate and hot-dry climates

Chicca, M., Wohlgemuth, J. & Tamizhmani, G., Nov 18 2016, 2016 IEEE 43rd Photovoltaic Specialists Conference, PVSC 2016. Institute of Electrical and Electronics Engineers Inc., Vol. 2016-November, p. 1686-1691 6 p. 7749911

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Degradation
Spectroscopy
Quantum efficiency
Inspection
Glass
2 Citations

Defect and safety inspection of 6 PV technologies from 56,000 modules representing 257,000 modules in 4 climatic regions of the United States

Tatapudi, S., Libby, C., Raupp, C., Srinivasan, D., Kuitche, J., Bicer, B. & Tamizhmani, G., Nov 18 2016, 2016 IEEE 43rd Photovoltaic Specialists Conference, PVSC 2016. Institute of Electrical and Electronics Engineers Inc., Vol. 2016-November, p. 1747-1751 5 p. 7749923

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Inspection
Defects
Monocrystalline silicon
Polysilicon
5 Citations

Degradation rate evaluation of multiple PV technologies from 59,000 modules representing 252,000 modules in four climatic regions of the United States

Raupp, C., Libby, C., Tatapudi, S., Srinivasan, D., Kuitche, J., Bicer, B. & Tamizhmani, G., Nov 18 2016, 2016 IEEE 43rd Photovoltaic Specialists Conference, PVSC 2016. Institute of Electrical and Electronics Engineers Inc., Vol. 2016-November, p. 255-260 6 p. 7749590

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Power plants
Cadmium telluride
Degradation
Crystalline materials
Monocrystalline silicon

Effect of spatial temperature uniformity on outdoor photovoltaic module performance characterization

Umachandran, N. & Tamizhmani, G., Nov 18 2016, 2016 IEEE 43rd Photovoltaic Specialists Conference, PVSC 2016. Institute of Electrical and Electronics Engineers Inc., Vol. 2016-November, p. 2731-2737 7 p. 7750148

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Temperature
Temperature distribution
Simulators
Air
Hot Temperature

Multi angle laser light scattering evaluation of field exposed thermoplastic photovoltaic encapsulant materials

Kempe, M. D., Miller, D. C., Wohlgemuth, J. H., Kurtz, S. R., Moseley, J. M., Nobles, D., Stika, K. M., Brun, Y., Samuels, S. L., Shah, Q. A., Tamizhmani, G., Sakurai, K., Inoue, M., Doi, T., Masuda, A. & Vanderpan, C. E., Jan 1 2016, In : Energy Science and Engineering. 4, 1, p. 40-51 12 p.

Research output: Contribution to journalArticle

Light scattering
Thermoplastics
Creep
Lasers
Polyurethanes
2 Citations

Regional soiling stations for PV: Soling loss analysis

Tamizhmani, G., King, B., Venkatesan, A., Deline, C., Pavgi, A., Tatapudi, S., Kuitche, J., Chokor, A. & Asmar, M. E., Nov 18 2016, 2016 IEEE 43rd Photovoltaic Specialists Conference, PVSC 2016. Institute of Electrical and Electronics Engineers Inc., Vol. 2016-November, p. 1741-1746 6 p. 7749922

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Rain
Dust
Time series
Atmospheric humidity
10 Citations

Study of soiling loss on photovoltaic modules with artificially deposited dust of different gravimetric densities and compositions collected from different locations in India

John, J. J., Warade, S., Tamizhmani, G. & Kottantharayil, A., Jan 1 2016, In : IEEE Journal of Photovoltaics. 6, 1, p. 236-243 8 p., 7327130

Research output: Contribution to journalArticle

India
Dust
modules
dust
Chemical analysis
2 Citations
modules
degradation
industrial plants
Degradation
Glass
2015
3 Citations

Angle of incidence effect on five soiled modules from five different PV technologies

Rajasekar, V., Boppana, S. & Tamizhmani, G., Dec 14 2015, 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015. Institute of Electrical and Electronics Engineers Inc., 7355970

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Glass
Soils
Air
Rain
2 Citations

Application of flexible glass to prevent PID in PV modules

Oh, J., Tamizhmani, G., Bowden, S. & Garner, S., Dec 14 2015, 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015. Institute of Electrical and Electronics Engineers Inc., 7355701

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Degradation
Glass
Industrial plants
Salix
Leakage currents
2 Citations

Cleaning frequency optimization for soiled photovoltaic modules

Naeem, M. & Tamizhmani, G., Dec 14 2015, 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015. Institute of Electrical and Electronics Engineers Inc., 7355972

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Cleaning
Monitoring
10 Citations

Determination of dominant failure modes using FMECA on the field deployed c-Si modules under hot-dry desert climate

Shrestha, S. M., Mallineni, J. K., Yedidi, K. R., Knisely, B., Tatapudi, S., Kuitche, J. & Tamizhmani, G., Jan 1 2015, In : IEEE Journal of Photovoltaics. 5, 1, p. 174-182 9 p., 6963264

Research output: Contribution to journalArticle

deserts
failure modes
Failure modes
climate
power plants
3 Citations

Failure modes and effect analysis of module level power electronics

Sastry, A., Kulasekaran, S., Flicker, J., Ayyanar, R., Tamizhmani, G., Roy, J., Srinivasan, D. & Tilford, I., Dec 14 2015, 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015. Institute of Electrical and Electronics Engineers Inc., 7355990

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Power electronics
Failure modes
Electronics industry
Physics
Industry
2 Citations

Field testing of thermoplastic encapsulants in high-temperature installations

Kempe, M. D., Miller, D. C., Wohlgemuth, J. H., Kurtz, S. R., Moseley, J. M., Shah, Q. A., Tamizhmani, G., Sakurai, K., Inoue, M., Doi, T., Masuda, A., Samuels, S. L. & Vanderpan, C. E., Nov 1 2015, In : Energy Science and Engineering. 3, 6, p. 565-580 16 p.

Research output: Contribution to journalArticle

Thermoplastics
Creep
Testing
Peroxides
Crosslinking
12 Citations

Interlaboratory study to determine repeatability of the damp-heat test method for potential-induced degradation and polarization in crystalline silicon photovoltaic modules

Hacke, P., Terwilliger, K., Glick, S., Tamizhmani, G., Tatapudi, S., Stark, C., Koch, S., Weber, T., Berghold, J., Hoffmann, S., Koehl, M., Dietrich, S., Ebert, M. & Mathiak, G., Jan 1 2015, In : IEEE Journal of Photovoltaics. 5, 1, p. 94-101 8 p., 6960016

Research output: Contribution to journalArticle

high temperature tests
Silicon
modules
Polarization
degradation
2 Citations

Nondestructive techniques to determine degradation modes: Experimentation with 18 years old photovoltaic modules

Chicca, M. & Tamizhmani, G., Dec 14 2015, 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015. Institute of Electrical and Electronics Engineers Inc., 7355709

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Degradation
Dark currents
Voltage measurement
Electroluminescence
Infrared imaging

Performance and reliability evaluation of concentrated photovoltaic (CPV) power plants

Raupp, C., Tatapudi, S., Bicer, B. & Tamizhmani, G., Dec 14 2015, 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015. Institute of Electrical and Electronics Engineers Inc., 7356185

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Power plants
Controllers
Industry
Hot Temperature
21 Citations

Potential-Induced Degradation (PID): Incomplete Recovery of Shunt Resistance and Quantum Efficiency Losses

Oh, J., Bowden, S. & TamizhMani, G., Aug 10 2015, In : IEEE Journal of Photovoltaics. 5, 6, p. 1540-1548 9 p., 7182748

Research output: Contribution to journalArticle

shunts
Quantum efficiency
quantum efficiency
recovery
degradation
6 Citations

Quantification and Modeling of Spectral and Angular Losses of Naturally Soiled PV Modules

John, J. J., Rajasekar, V., Boppana, S., Chattopadhyay, S., Kottantharayil, A. & Tamizhmani, G., Aug 20 2015, In : IEEE Journal of Photovoltaics. 5, 6, p. 1727-1734 8 p., 7214211

Research output: Contribution to journalArticle

modules
Quantum efficiency
Dust
quantum efficiency
Silicon
3 Citations

Quantum efficiency loss after PID stress: Wavelength dependence on cell surface and cell edge

Oh, J., Bowden, S., Tamizhmani, G. & Hacke, P., Dec 14 2015, 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015. Institute of Electrical and Electronics Engineers Inc., 7355629

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Antireflection coatings
Quantum efficiency
Degradation
Wavelength
Chemical properties
3 Citations

Regional soiling stations for PV: Design, calibration and installation

King, B., Tamizhmani, G., Tatapudi, S., Rajasekar, V. & Boppana, S., Dec 14 2015, 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015. Institute of Electrical and Electronics Engineers Inc., 7355974

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Cocoa
Calibration
Monocrystalline silicon
Carbon Monoxide
Beaches
4 Citations

Selection of best methods to calculate degradation rates of PV modules

Shrestha, S. & Tamizhmani, G., Dec 14 2015, 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015. Institute of Electrical and Electronics Engineers Inc., 7355703

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Degradation
Incident solar radiation
1 Citations

Soiling and self-cleaning of PV modules under the weather conditions of two locations in Arizona and South-East India

Herrmann, W., Schweiger, M., Tamizhmani, G., Shisler, B. & Kamalaksha, C., Dec 14 2015, 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015. Institute of Electrical and Electronics Engineers Inc., 7356131

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Cleaning
Glass
Coatings
Power plants
2 Citations

Statistical methods to determine dominant degradation modes of fielded PV modules

Umachandran, N., Kuitche, J. & Tamizhmani, G., Dec 14 2015, 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015. Institute of Electrical and Electronics Engineers Inc., 7355699

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Statistical methods
Degradation
Defects
Statistical tests
Delamination
6 Citations

Validated method for repeatable power measurement of CIGS modules exhibiting light-induced metastabilities

Deceglie, M. G., Silverman, T. J., Emery, K., Dirnberger, D., Schmid, A., Barkaszi, S., Riedel, N., Pratt, L., Doshi, S., Tamizhmani, G., Marion, B. & Kurtz, S. R., Mar 1 2015, In : IEEE Journal of Photovoltaics. 5, 2, p. 607-612 6 p., 6994210

Research output: Contribution to journalArticle

Gallium
Indium
metastable state
gallium
indium
1 Citations

Working towards the development of a standardized artificial soiling method

Boppana, S., Rajasekar, V. & Tamizhmani, G., Dec 14 2015, 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015. Institute of Electrical and Electronics Engineers Inc., 7355987

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Monocrystalline silicon
Polysilicon
Quantum efficiency
Soils
Glass
2014
5 Citations

Angle of incidence effects on soiled PV modules

John, J., Rajasekar, V., Boppana, S., Tatapudi, S. & Tamizhmani, G., 2014, Reliability of Photovoltaic Cells, Modules, Components, and Systems VII. SPIE, Vol. 9179, 91790D

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Incidence
incidence
modules
Angle
Glass
Degradation
Leakage currents
Reflective coatings
Laminating
Electric potential
9 Citations

Application of reverse bias recovery technique to address PID issue: Incompleteness of shunt resistance and quantum efficiency recovery

Oh, J., Bowden, S. & Tamizhmani, G., Oct 15 2014, 2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014. Institute of Electrical and Electronics Engineers Inc., p. 925-929 5 p. 6925065

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Quantum efficiency
Recovery
Degradation
Bias voltage
Durability
10 Citations

A statistical analysis on the cell parameters responsible for power degradation of fielded pv modules in a hot-dry climate

Janakeeraman, S. V., Singh, J., Kuitche, J., Mallineni, J. K. & Tamizhmani, G., Oct 15 2014, 2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014. Institute of Electrical and Electronics Engineers Inc., p. 3234-3238 5 p. 6925624

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Statistical methods
Degradation
Discoloration
Soldering alloys
Power plants
7 Citations

Degradation and failure modes of 26-year-old 200 kW power plant in a hot-dry desert climate

Olakonu, K., Belmont, J., Tatapudi, S., Kuitche, J. & Tamizhmani, G., Oct 15 2014, 2014 IEEE 40th Photovoltaic Specialist Conference, PVSC 2014. Institute of Electrical and Electronics Engineers Inc., p. 3207-3210 4 p. 6925618

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Failure modes
Power plants
Degradation
Wear of materials
Monocrystalline silicon