Publications

Featured Articles

Per-unit Modeling via Similarity Transformation

D. Venkatramanan, Sairaj Dhople

(2022)

Averaged Dynamic Model of Three-level NPC Grid-following Inverter for Examining Neutral-point Instability

D. Venkatramanan, Brian Johnson, Sairaj Dhople

(2021)

A Nonlinear Model Based Analysis and Accurate Design of Ultracapacitor Stack for Energy Storage Systems

P. Roja, D. Venkatramanan (co-first author), Vinod John

(2021)

Dynamic Modeling and Analysis of Buck Converter based Solar PV Charge Controller for Improved MPPT Performance

D. Venkatramanan, Vinod John

(2019)

Posters

On Ultracapacitor modeling for designing energy-storage banks

(2022)

On Islanding study of grid-tie GFL inverters

(2017)

On General-purpose Inverter Stack design and performance

(2016)

Journal Articles

  1. D. Venkatramanan and Sairaj Dhople, "Per-unit Modeling via Similarity Transformation," IEEE Transactions on Energy Conversion, 2022 (accepted).

  2. Nathan Baeckeland, D. Venkatramanan, Michael Kleemann, and Sairaj Dhople, "Stationary-frame Grid-forming Inverter Control Architectures for Unbalanced Fault-current Limiting," IEEE Transactions on Energy Conversion, 2022 (accepted).

  3. P. Roja, D. Venkatramanan (co-first author), and Vinod John, "A Nonlinear Model-based Analysis and Accurate Design of Ultracapacitor Stack for Energy Storage Systems," in IEEE Transactions on Energy Conversion, vol. 37, no. 1, pp. 403 - 412, Mar. 2021.

  4. P. Roja, D. Venkatramanan, and Vinod John, "Design Considerations of Ultracapacitor Stack for Optimal Sizing of Energy Storage Systems in Contingency Applications," IEEE Transactions on Industry Applications, vol. 56, no. 6, pp. 6803-6814, Nov.-Dec. 2020.

  5. D. Venkatramanan and Vinod John, "A Reconfigurable Solar Photovoltaic Grid-Tied Inverter Architecture for Enhanced Energy Access in Backup Power Applications," IEEE Transactions on Industrial Electronics, vol. 67, no. 12, pp. 10531-10541, Dec. 2020.

  6. D. Venkatramanan and Vinod John, "Dynamic Phasor Modeling and Stability Analysis of SRF-PLL-Based Grid-Tie Inverter Under Islanded Conditions," IEEE Transactions on Industry Applications, vol. 56, no. 2, pp. 1953-1965, Mar.-Apr. 2020.

  7. D. Venkatramanan and Vinod John, "Dynamic Modeling and Analysis of Buck Converter Based Solar PV Charge Controller for Improved MPPT Performance," IEEE Transactions on Industry Applications, vol. 55, no. 6, pp. 6234-6246, Nov.-Dec. 2019.

  8. D. Venkatramanan, Anil K Adapa, Pallavi B, and Vinod John, "Power Conversion Technologies for High-Performance AC Micro-grid," INAE Letters, vol. 4, no. 1, pp. 27-35, 2019.

  9. D. Venkatramanan and Vinod John, "Design and comparative study of discrete and module-based IGBT power converters," Sadhana, vol. 42, no. 8, pp. 14091-1409, Aug 2017.

  10. Anil K Adapa, D. Venkatramanan, and Vinod John, "Auxiliary subsystems of a General-Purpose IGBT Stack for high-performance laboratory power converters," Sadhana, vol. 42, No. 8, pp. 1355-1362, Aug 2017.

  11. D. Venkatramanan and Vinod John, "Integrated higher-order pulse-width modulation filter-transformer structure for single-phase static compensator," IET Power Electronics, vol. 6, no. 1, pp. 67-77, Jan 2013.

Conference Papers


  1. Nathan Baeckeland, D. Venkatramanan, Michael Kleemann, and Sairaj Dhople, "Fault Behavior of Inverter-based Resources: A Comparative Study for Grid-forming and Grid-following Control Paradigms," Proc. IEEE Annual Conference of the IEEE Industrial Electronics Society (IECON), Brussels, Belgium, Oct 2022 (Accepted).

  2. Little Pradhan, Renuka Varma, D. Venkatramanan, Prince Kumar, Ned Mohan, Abhijit Kshirsagar, "Novel Carrier-reassignment PWM Techniques for Sub-Module Power Balancing in CHB Converters," Proc. IEEE Annual Conference of the IEEE Industrial Electronics Society (IECON), Brussels, Belgium, Oct 2022 (Accepted).

  3. Nathan Baeckeland, D. Venkatramanan, Sairaj Dhople, and Michael Kleemann, "On the Distance Protection of Power Grids dominated by Grid-forming Inverters," Proc. IEEE PES Innovative Smart Grid Technologies, Novi Sad, Serbia, Oct 2022 (Accepted).

  4. D. Venkatramanan, Manish K Singh, Olaoluwapo Ajala, Alejandro Domínguez-García, and Sairaj Dhople, "Integrated System Models for Networks with Generators & Inverters," Proc. 11th Bulk Power Systems Dynamics and Control Symposium (IREP-2022), Banff, Canada, July 2022.

  5. D. Venkatramanan, Brian Johnson, and Sairaj Dhople, "Averaged Dynamic Model of Three-level NPC Grid-following Inverter for Examining Neutral-point Instability," Proc. IEEE Workshop on Control and Modeling for Power Electronics (COMPEL), Cartagena, Colombia, pp. 1-7, Nov 2021.

  6. D. Venkatramanan, N. Vamanan, Brian Johnson, and Sairaj Dhople, "Quantitative Analysis of Third-harmonic Neutral-point Current, its Impacts, and Mitigation in Three-level NPC Inverters," Proc. IEEE Energy Conversion Congress and Exposition (ECCE), pp. 3563–3570, Vancouver, Canada, Oct 2021.

  7. P. Kumar, D. Venkatramanan, A. Kshirsagar, and N. Mohan, "A Hybrid GaN + Si based Cascaded H-bridge Multi-level Inverter and PWM scheme for Improved Efficiency," Proc. IEEE Energy Conversion Congress and Exposition (ECCE), Vancouver, Canada, pp. 296-301, Oct 2021.

  8. V. N. Vipin, D. Venkatramanan, and N. Mohan, "Grid Integration of Heterogeneous Energy Sources/Loads using a Multi-port MMC with Independent Power Flow," Proc. Annual Conference of the IEEE Industrial Electronics Society (IECON), Toronto, Canada, pp. 1-6, July 2021.

  9. D. Venkatramanan and Vinod John, "A Modified Common-Mode Filter with Enhanced Attenuation Performance in Single-Phase Grid-Tied Solar PV Inverters," Proc. IEEE International Conference on Power Electronics, Smart Grid and Renewable Energy (PESGRE), Kochi, India, pp. 1-6, 2020.

  10. P. Roja, D. Venkatramanan and Vinod John, "Optimal design of energy storage system using ultracapacitors for contingency power applications," Proc. IEEE International Conference on Power Electronics, Smart Grid and Renewable Energy (PESGRE), Kochi, India, pp. 1-6, 2020.

  11. D. Venkatramanan and Vinod John, "Dynamic Modeling and Analysis of Buck Converter based Solar PV Charge Controller for Improved MPPT Performance," Proc. IEEE Power Electronics, Drives. and Energy Systems Conference (PEDES), Chennai, India, pp. 1-6, Dec. 2018.

  12. P. Roja, Venkatramanan D, Sridevi K, and Vinod John, "Design and Performance Evaluation of General Purpose Device Characterization Setup," Proc. IEEE Power Electronics, Drives. and Energy Systems Conference (PEDES), Chennai, India, pp. 1-6, Dec. 2018.

  13. Aditya Zade, Venkatramanan D, and Vinod John, "Power Converter Based Impedance Emulation of Passive Loads for Anti-Islanding Tests," Proc. IEEE Power Electronics, Drives. and Energy Systems Conference (PEDES), Chennai, India, pp. 1-6, Dec. 2018.

  14. D. Venkatramanan and Vinod John, "Supervisory Control Architecture for Standalone Solar Photo-Voltaic Power Generation System," Proc. IEEE Energy Conversion Congress and Exposition (ECCE), Portland, OR, USA, pp. 6688-6695, Sept. 2018.

  15. D. Venkatramanan and Vinod John, "Dynamic Phasor Modeling of SRF-PLL Based Grid-Tie Inverter Under Islanded Conditions," Proc. IEEE Energy Conversion Congress and Exposition (ECCE), Portland, OR, USA, pp. 5670-5676, Sept. 2018.

  16. D. Venkatramanan and Vinod John, "Modeling and analysis of passive networks using dynamic phasors for study of Islanded Inverters," Proc. IEEE International Transportation Electrification Conference (ITEC), Pune, India, pp. 1-6, Dec. 2017.

  17. Rahul Mallik, D. Venkatramanan, and Vinod John, "Resistance emulation based fault ride-through in standalone voltage source inverters," Proc. IEEE International Transportation Electrification Conference (ITEC), Pune, India, pp. 1-6, Dec. 2017.

  18. D. Venkatramanan, Anil Kumar Adapa, Kapil Upamanyu and Vinod John, "Low current switching behavior of IGBT and associated spurious tripping in inverters employing Vce de-saturation protection," Proc. IEEE Power Electronics, Drives. and Energy Systems Conference (PEDES), Trivandrum, India, pp. 1-6, Dec. 2016.

  19. Kapil Upamanyu, D. Venkatramanan, Anil Kumar Adapa, and Vinod John, "Experimental study on the influence of dead-time on IGBT turn-on characteristics in an inverter leg at high and low currents," Proc. IEEE International Conference on Power Electronics (IICPE), Patiala, India, pp. 1-6, Dec. 2016.

  20. D. Venkatramanan, Anil Kumar Adapa, and Vinod John, "Design and comparative study of discrete and module-based IGBT power converters," Proc. National Power Electronics Conference (NPEC), IIT Bombay, India, pp. 1-6, Dec. 2015.

  21. Anil Kumar Adapa, D. Venkatramanan, and Vinod John, "Auxiliary subsystems of a General-Purpose IGBT Stack for high-performance laboratory power converters," Proc. National Power Electronics Conference (NPEC), IIT Bombay, India, pp. 1-6, Dec. 2015.

  22. D. Venkatramanan and Vinod John, "A Resonant integrator based PLL and AC current controller for single phase grid connected PWM-VSI," Proc. National Power Systems Conference (NPSC), Hyderabad, India, Dec 2010.

Talks & Seminars

Patents

  1. D. Venkatramanan and Vinod John, IISc, Central Power Research Institute (CPRI) and C-DAC, "A Recongurable Power Conversion System and Method for Enhanced Utilization of Renewable Energy", Indian Patent Appl. No. R20184034410, Full Patent Filed on: Nov. 2018.