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Faculty

Harish Sarma Krishnamoorthy
Dr. Harish Sarma Krishnamoorthy, Senior Member IEEE
Associate Professor - ECE Department, Associate Director - PEMSEC Consortium, Associate Editor - IEEE Transactions on Power Electronics;
Office Location N330 Engineering Building 1
Phone 713-743-7382
Fax 713-743-4444
Email hskrishn [at] uh.edu
Publications
Education
Ph.D. (2015), Electrical and Computer Engineering, Texas A&M University, College Station, TX
B.Tech. (2008), Electrical and Electronics Engineering, National Institute of Technology (NIT), Tiruchirappalli, TN, India
Professional Experience
Schlumberger REMS, Sugarland, TX, 2015-2017
General Electric (GE) Energy, Hyderabad, AP, India, 2008-2010
Ford Motor Company Research Headquarters, Dearborn, MI, 2012
Google Inc., Mountain View, CA, 2014
Classes
ECE-6305: Power Converters and Control
ECE-6318: Power Converters - Modeling and Applications
ECE-6343: Renewable Energy and Distributed Generation
ECE-5380: Power Electronics and Electric Drives (Undergraduate)
ECE-5388: Renewable Energy Technology (Undergraduate)
Awards & Honors
NSF CAREER Award (#2239966) in 2023 to work on 'Edge Intelligence' for Power Converters
IEEE PELS Young Professional Exceptional Service Award 2023 - Inaugural Recipient
OTC Emerging Leader - recognized by the Offshore Technology Conference (OTC) 2022
Invited Attendee - U.S. National Academy of Engineering's (NAE's) Frontiers of Engineering Symposium, September 2022
Research Excellence Award - 2022, UH Cullen College of Engineering
Teaching Excellence Award - 2021, UH Cullen College of Engineering
Best Presentation awards for outstanding papers in 'Power Electronics for Utility Interface' sessions at IEEE APEC conferences held in 2013 as well as 2015.
Senior Member of the IEEE
Steering Committee Member of IEEE Power Electronics Society’s Mentorship group (2017 to present).
General Chair of the IEEE PELS Mentorship round tables' event during ECCE-2017 and ECCE-2019 conferences
Chair of IEEE PELS Young Professional (YP) Committee (2020-2021) and Chair of IEEE PELS Day 2021 Steering Committee
Active reviewer of reputed IEEE/Elsevier journals, including Transactions on Power Electronics (TPEL), Transactions on Industrial Applications (IAS), etc. as well as for reputed IEEE conferences such as APEC and ECCE.
Innovation Champion award certificate from GE for multiple invention disclosures.
GE’s DFSS and DMAIC 6-Sigma Green Belt Certification.
Core Member of Organizing Committee for multiple IEEE Conferences
Editorial Boards
Associate Editor, IEEE Transactions on Power Electronics
Research Interests

High density power converters, solid state transformers (SSTs) and control for utility grid integration of renewable energy (wind, solar, etc.), data centers, electric vehicles and adjustable speed drives

Advanced power electronics and health analytics (using machine learning and statistical methods) for applications involving extreme environments or critical mission profiles such as defense, aerospace, downhole and subsea

Power conversion for RF related applications (such as RADAR, 4G/5G Communication, and NMR Metrology)

Funded Research
NSF CAREER: Enhancing the State of Health and Performance of Electronics via in-situ Monitoring and Prediction (SHaPE-MaP) - Toward Edge Intelligence in Power Conversion
Mini-PulPS: Miniaturized Pulsed Power Systems for Mission Critical Applications (U.S. DOE/ARPA-E OPEN 2021)
ComET: Power conversion for 4G/5G envelope tracking (U.S. DoD/Navy)
HIPER: High density power conversion using GaN devices and machine learning based prediction of remaining useful life (U.S. DoD/Navy)
Battery Power Technology: Improving reliability, resiliency and gain of power conversion for grid energy storage (Sandia National Labs)
Solid State Transformers (SSTs): Multi-port energy router for offshore renewable integration with oil & gas production (TCEQ/SSI)
Selected Publications

**A complete list of publications can be found in this link: https://scholar.google.com/citations?user=bVvczqUAAAAJ&hl=en

  1. H. Sayed, G. S. Kulothungan and H. S. Krishnamoorthy, "Characterization of GaN HEMTs' Aging Precursors and Activation Energy Under a Wide Range of Thermal Cycling Tests," in IEEE Open Journal of the Industrial Electronics Society, vol. 4, pp. 123-134, 2023
  2. H. Sayed and H. S. Krishnamoorthy, "Resonant Network-Based MVDC Circuit Breaker Topologies With Fast Current Breaking Capability," in IEEE Access, vol. 11, pp. 33715-33724, 2023
  3. A. K. R. Siddavatam, S. R. P. Reddy, K. Rajashekara, H. Huang, H. Krishnamoorthy, et al., “A H-type architecture for electric/hybrid-electric aircraft propulsion systems.”, IET Electr. Syst. Transp. e12065. 1– 12 (2023)
  4. Y. Yao, G. S. Kulothungan, and H. S. Krishnamoorthy, “Improved circuit design and adaptive burst mode control in PSFB converters for higher efficiency over a wide power range” in IEEE Access, vol. 10, pp. 9152-9163, 2022
  5. Y. Yao, G. S. Kulothungan, H. S. Krishnamoorthy, et al., “GaN-based two-stage converter with high power density and fast response for pulsed load applications” in the IEEE Transactions on Industrial Electronics, 2022
  6. S. Yerra and H. S. Krishnamoorthy, "Simplified Gate Driver Design Technique for Multi-MHz Switching GaN FETs in Three-Level Buck-Based 4G/5G Envelope Tracking," in IEEE Transactions on Industry Applications, vol. 58, no. 5, pp. 6438-6447, Sept.-Oct. 2022
  7. G. S. Kulothungan, Y. Yao, H. S. Krishnamoorthy, A. Das, and H. Soni, "Microcontroller-Based Trapezoidal Slope Compensation Technique for Peak Current Mode Control at MHz Frequencies," in IEEE Transactions on Industry Applications, vol. 59, no. 4, pp. 4322-4333, July-Aug. 2023
  8. A. Karbozov, M. G. Majumder, H. S. Krishnamoorthy and K. Rajashekara, "Triple Active Bridge Based Multiport Energy Router for Subsea – Renewable Interconnection," in IEEE Transactions on Industry Applications, vol. 59, no. 4, pp. 4528-4538, July-Aug. 2023
  9. V. Balan, W. Zhu, H. Krishnamoorthy, et al., “Challenges and opportunities in Producing High-Quality Edible Mushrooms from Lignocellulosic Biomass in a Small-Scale” in the Journal of Applied Microbiology and Biotechnology (Springer), 2022
  10. A. K. R. Siddavatam, S. R. P. Reddy, K. Rajashekara, H. Huang, H. Krishnamoorthy, et al., “Fault-Tolerant Architectures with Enhanced Bus Protection for Electric/Hybrid Aircraft Systems” accepted in the IEEE Transactions on Transportation Electrification, 2022
  11. C. N. M. Ajmal, I. V. Raghavendra, S. Naik, A. Ray and H. S. Krishnamoorthy, "A Modified Hybrid DC Circuit Breaker With Reduced Arc for Low Voltage DC Grids," in IEEE Access, vol. 9, pp. 132267-132277, 2021
  12. A. R. Sadat and H. S. Krishnamoorthy, "Fault-Tolerant ISOSP Solid-State Transformer for MVDC Distribution," in IEEE Journal of Emerging and Selected Topics in Power Electronics, vol. 9, no. 6, pp. 6985-6996, Dec. 2021
  13. H. S. Krishnamoorthy, P. N. Enjeti and J. J. Sandoval, "Solid-State Transformer for Grid Interface of High-Power Multipulse Rectifiers," in IEEE Transactions on Industry Applications, vol. 54, no. 5, pp. 5504-5511, Sept.-Oct. 2018
  14. K. Rajashekara, H. S. Krishnamoorthy, and B. S. Naik, “Electrification of subsea systems: requirements and challenges in power distribution and conversion,” CPSS Transactions on Power Electronics and Applications, vol. 2, no. 4, pp. 259–266, 2017
  15. H. Krishnamoorthy, M. Daniel, J. Ramos-Ruiz, P. Enjeti, L. Liu, and E. Aeloiza, “Isolated AC–DC converter using medium frequency transformer for off-shore wind turbine DC collection grid,” IEEE Transactions on Industrial Electronics, vol. 64, no. 11, pp. 8939–8947, 2017
  16. W. Zhang, D. Xu, P. N. Enjeti, H. Li, J. T. Hawke, and H. S. Krishnamoorthy, "Survey on Fault-Tolerant Techniques for Power Electronic Converters," in IEEE Transactions on Power Electronics, vol. 29, no. 12, pp. 6319-6331, Dec. 2014
  17. J. J. Sandoval, H. S. Krishnamoorthy, P. N. Enjeti, and S. Choi, “Reduced active switch front-end multi-pulse rectifier with medium-frequency transformer isolation,” IEEE Transactions on Power Electronics, vol. 32, no. 10, pp. 7458–7468, 2016
  18. M. T. Daniel, H. S. Krishnamoorthy, and P. N. Enjeti, “A new wind turbine interface to MVdc collection grid with high-frequency isolation and input current shaping,” IEEE Journal of Emerging and Selected Topics in Power Electronics, vol. 3, no. 4, pp. 967–976, 2015
  19. J. T. Hawke, H. S. Krishnamoorthy, and P. N. Enjeti, “A family of new multiport power-sharing converter topologies for large grid-connected fuel cells,” IEEE Journal of Emerging and Selected Topics in Power Electronics, vol. 2, no. 4, pp. 962–971, 2014
  20. Gu, H. S. Krishnamoorthy, P. N. Enjeti, Z. Zheng, and Y. Li, “A medium-voltage matrix converter topology for wind power conversion with medium frequency transformers,” Journal of Power Electronics, vol. 14, no. 6, pp. 1166–1177, 2014
  21. P. Garg, S. Essakiappan, H. S. Krishnamoorthy, and P. N. Enjeti, “A fault-tolerant three-phase adjustable speed drive topology with active common-mode voltage suppression,” IEEE Transactions on Power Electronics, pp. 2828–2839, 2014
  22. S. Essakiappan, H. S. Krishnamoorthy, P. Enjeti, R. S. Balog, and S. Ahmed, “Multilevel medium-frequency link inverter for utility-scale photovoltaic integration,” IEEE Transactions on power electronics, vol. 30, no. 7, 2014
  23. H. S. Krishnamoorthy, D. Rana, P. Garg, P. N. Enjeti, and I. J. Pitel, “Wind turbine generator–battery energy storage utility interface converter topology with medium-frequency transformer link,” IEEE Transactions on power electronics, vol. 29, no. 8, pp. 4146–4155, 2013.
  24. A. Karbozov, H. S. Krishnamoorthy, and K. S. Rajashekara, “Modular Multiport Converter based Offshore Grid Architecture for Integrating Renewables and HVDC Grid", 2023 IEEE 14th International Symposium on Power Electronics for Distributed Generation Systems (PEDG), Shanghai, China, 2023, pp. 1-6
  25. S. Narayana Iyer, T. Megaritis, L. Ganippa, and H. S. Krishnamoorthy, "Methanol + Hydrogen - A Prospective Alternate Fuel for Cleaner Offshore Power Generation." Paper presented at the Offshore Technology Conference, Houston, Texas, USA, May 2023
  26. B. Bohara and H. S. Krishnamoorthy, "Computer Vision based Framework for Power Converter Identification and Analysis," 2022 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), Jaipur, India, 2022, pp. 1-6
  27. S. Chen and H. S. Krishnamoorthy, "Analysis of Parasitic Inductance in Multi-MHz Frequency Switching Power Converters," 2022 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), Jaipur, India, 2022, pp. 1-5
  28. M. Diabate, T. Vriend, H. S. Krishnamoorthy and J. Shi, "Hydrogen and Battery – Based Energy Storage System (ESS) for Future DC Microgrids," 2022 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), Jaipur, India, 2022, pp. 1-6
  29. H. Sayed, B. Bohara, and H. S. Krishnamoorthy, "Embedded Impedance Measurement for DC Microgrid Towards PHM and Control," 2022 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), Jaipur, India, 2022, pp. 1-6
  30. P. Pasapuleti, A. K. Reddy Siddavatam, and H. S. Krishnamoorthy, "Net-Zero-Energy based Sustainable Agriculture: A Case Study of Container Mushroom Farming," 2022 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), Jaipur, India, 2022, pp. 1-6
  31. F. Kalantari, J. Shi, and H. S. Krishnamoorthy, "Simulating the Power Electronics-Dominated Grid using Schwarz-Schur Complement based Hybrid Domain Decomposition Algorithm," 2022 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), Jaipur, India, 2022, pp. 1-6
  32. S. Abongmbo, D. Benhaddou, H. Krishnamoorthy, L. Fan, and J. Shi, "Optimal Sizing of Islanded Microgrid using the Backtracking Search Optimization Algorithm with Standard Brownian Walk," 2022 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), Jaipur, India, 2022, pp. 1-5
  33. A. Karbozov, M. G. Majumder, H. S. Krishnamoorthy, and K. S. Rajashekara, " A Novel Control Strategy for Extending the ZVS Range of Triple Active Bridge Converter", IEEE Energy Conversion Congress and Exposition (ECCE), Detroit, MI, USA, 2022, pp. 1-6
  34. S. R. P. Reddy, K. Rajashekara, and H. S. Krishnamoorthy, "Resistive Superconducting Fault Current Limiter - Integrated Bidirectional Hybrid DC Circuit Breaker for HVDC Systems," 2022 International Power Electronics Conference (IPEC-Himeji 2022- ECCE Asia), 2022, pp. 2004-2008
  35. F. Kalantari, J. Shi and H. S. Krishnamoorthy, "Two-stage Hybrid Domain Decomposition Algorithm for Power System Transient Stability Simulation," 2022 IEEE Kansas Power and Energy Conference (KPEC), 2022, pp. 1-6
  36. G. S. Kulothungan, H. Sayed, and H. S. Krishnamoorthy, "Novel Method for Accelerated Thermal Cycling of Gallium Nitride Power Devices to Perform Reliability Assessment", in the IEEE Applied Power Electronics Conference (APEC), Mar. 2022, Houston, TX, USA
  37. H. Sayed, G. S. Kulothungan, H. S. Krishnamoorthy, "Dynamic Remaining Useful Lifetime (RUL) Estimation of Power Converters based on GaN Power FETs", in the IEEE Applied Power Electronics Conference (APEC), Mar. 2022, Houston, TX, USA
  38. A. Karbozov, M. G. Majumder, H. S. Krishnamoorthy, and K. S. Rajashekara, "Medium Frequency SST Based Multiport Energy Routers for Subsea – Renewable Interconnection", in the IEEE Applied Power Electronics Conference (APEC), Mar. 2022, Houston, TX, USA
  39. B. Bohara, A. Karbozov and H. S. Krishnamoorthy, "Triple Phase Shift Control of Dual Active Bridge Converter using Machine Learning Methods," 2022 IEEE Texas Power and Energy Conference (TPEC), 2022, pp. 1-6
  40. M. F. Baba, A. V. Giridhar, B. L. Narasimharaju and H. S. Krishnamoorthy, "Non-isolated Switched Inductor - Capacitor based High Gain DC-DC Converter," 2021 IEEE National Power Electronics Conference (NPEC), 2021, pp. 1-6
  41. Y. Yao and H. S. Krishnamoorthy, "High Density Power Converter Design for Pulsed NMR Applications," 2021 IEEE Energy Conversion Congress and Exposition (ECCE), Oct. 2021
  42. G. S. Kulothungan, Y. Yao, H. S. Krishnamoorthy, H. Soni and A. Das, "A Novel Trapezoidal Slope Compensation Technique with Peak Current Mode Control for Power Converters Switching at MHz Frequencies," 2021 IEEE Energy Conversion Congress and Exposition (ECCE), Oct. 2021
  43. F. Islam and H. S. Krishnamoorthy, "Doubly-fed Solid State Auto-Transformer (SSAT) concept for Multi-pulse Rectifiers," 2021 IEEE Energy Conversion Congress and Exposition (ECCE), Oct. 2021
  44. H. Sayed and H. S. Krishnamoorthy, "Fault-Tolerant Z-Source-based Isolated DC-DC Building Blocks for Mission-Critical DC Distribution Applications," IECON 2021 – 47th Annual Conference of the IEEE Industrial Electronics Society, Oct. 2021
  45. S. Yerra and H. S. Krishnamoorthy, “Simplified Gate Driving Strategy for GaN-Based Multi-level Buck Converters Operating at Multi-MHz Switching Frequencies” – at the IEEE Applied Power Electronics Conference (APEC), Jun. 2021
  46. S. Yerra and H. S. Krishnamoorthy, “Cascaded Switching Capacitor Based Multi-Phase Three-Level Buck Converter for Communication Envelope Tracking” – at the IEEE Applied Power Electronics Conference (APEC), Jun. 2021
  47. H. S. Krishnamoorthy and T. N. Aayer, “Scalable Power Converter Architectures with Quantized Output and Envelope Prediction for Wireless Communication” –at the IEEE Applied Power Electronics Conference (APEC), Jun. 2021
  48. H. S. Krishnamoorthy, K. S. Rajashekara, A. Das, J. Hawke, et al., “GaN-based Compact Power Supplies with Fast Response for Pulsed Radar Applications” – U. S. DoD GOMACTech Conference, Mar. 2021
  49. Y. Yao, G. S. Kulothungan and H. S. Krishnamoorthy, “Comparative Study on Practical Implications of Digital Peak Current and Hysteresis Current Controllers for MHz Frequency DC/DC Converters”, IEEE PEDES Conference, India, Dec. 2020
  50. S. Yerra, G. S. Kulothungan and H. S. Krishnamoorthy, “Design and Analysis of Fourth Order ZVS Output Filter for Three-Level Buck Envelope Tracking Power Supply”, IEEE PEDES Conference, India, Dec. 2020
  51. A. R. Sadat, Y. Yao and H. S. Krishnamoorthy, “Power FET Degradation based on Thermal Equilibrium during Mission-Profile Characterization”, IEEE PEDES, India, Dec. 2020
  52. A. R. Sadat and H. S. Krishnamoorthy, "Measure Theory-based Approach for Remaining Useful Lifetime Prediction in Power Converters," IEEE Energy Conversion Congress and Exposition (ECCE), Detroit, MI, USA, Oct. 2020
  53. Y. Yao and H. S. Krishnamoorthy, "LLC Resonant Converter using Pre-Charged Capacitor for High Input Voltage – High PAPR Envelope Tracking," IEEE Energy Conversion Congress and Exposition (ECCE), Detroit, MI, USA, Oct. 2020
  54. S. Yerra and H. S. Krishnamoorthy, “Multi–Phase 3–Level Buck Converter with Current Self -Balancing for High Bandwidth Envelope Tracking Power Supply” 2020 IEEE Applied Power Electronics Conference and Exposition (APEC), New Orleans, LA, Mar. 2020
  55. S. Yerra, Y. Yao and H. S. Krishnamoorthy, "Single Stage Three-Level Interleaved Buck Converter with Current Self-Balancing for Improved Point-of-Load Performance", 2020 IEEE PESGRE, Cochin, India, Jan. 2020
  56. G. Selvaraj, A. Sadat, H. S. Krishnamoorthy and K. Rajashekara, " An improved fault-tolerant power converter for electric vehicle propulsion", 2020 IEEE PESGRE, India, Jan. 2020
  57. Y. Yao, S. Yerra and H. S. Krishnamoorthy, "Linear Assisted DC/DC Converter for Pulsed Mode Power Applications", IEEE PESGRE, Cochin, India, Jan. 2020
  58. S. M. Babu, V. K. S. Veeramallu, B. L. Narasimharaju, A. K. Rathore and H. S. Krishnamoorthy, "Novel Non-Isolated Differential Buck-Boost Inverter with Single-Stage Conversion and Reduced Device Voltage Stress", IEEE PESGRE, Cochin, India, Jan. 2020
  59. S. M. Babu, V. K. S. Veeramallu, B. L. Narasimharaju, A. K. Rathore and H. S. Krishnamoorthy, " Novel Single-Stage Transformer-less Cascaded Differential Boost Single-Phase PV Inverter for Grid-Tied Applications", IEEE PESGRE, Cochin, India, Jan. 2020
  60. H. S. Krishnamoorthy and T. N. Aayer, “Machine Learning based Modeling of Power Electronic Converters,” in 2019 IEEE Energy Conversion Congress and Exposition (ECCE).
  61. A. Hussain, K. Raj, K. Rajashekara, H. Krishnamoorthy, and S. Atcitty, “Current Controlled Operation of Cascaded H-Bridge Converter for Fast SoC Balancing in Grid Energy Storage,” in 2019 IEEE Energy Conversion Congress and Exposition (ECCE), pp. 5373–5379.
  62. Hussain, K. Raj, K. Rajashekara, H. Krishnamoorthy, and S. Atcitty, “A Voltage Droop-Based State of Charge Control among Split Batteries in Modular Multilevel Converter for Grid Energy Storage Interface,” in 2019 IEEE Industry Applications Society Annual Meeting.
  63. S. Yerra, H. Krishnamoorthy, and J. Hawke, “Three-Level DC-DC Converter using eGaN FETs for Wide Bandwidth Envelope Tracking Applications with Extended Output Voltage Range,” in 2019 21st European Conference on Power Electronics and Applications (EPE’19 ECCE Europe), 2019.  
  64. A. Ray, K. Rajashekara, and H. Krishnamoorthy, “Novel HVDC Power Transmission Architectures for Subsea Grid,” in Offshore Technology Conference, 2019.
  65. H. S. Krishnamoorthy and K. Rajashekara, “Resonant Hybrid MVDC Circuit Breakers with In-Line Inductor,” in 2019 21st European Conference on Power Electronics and Applications (EPE’19 ECCE Europe), 2019, p. P. 1-P. 9.
  66. S. H. Metwally, X. Zhang, S. Ali and H. S. Krishnamoorthy, "Solar PV and BESS based Home Energy System," 2019 IEEE Texas Power and Energy Conference (TPEC), College Station, TX, USA, 2019
  67. A. R. Sadat, H. S. Krishnamoorthy, and S. Yerra, “Isolated Multilevel HVDC Converter for Off -shore DC Distribution,” in 2018 IEEE Energy Conversion Congress and Exposition (ECCE).
  68. H. S. Krishnamoorthy and S. Yerra, “Solid state auto-transformer concept for multi-pulse rectifiers,” in 2018 IEEE Applied Power Electronics Conference and Exposition (APEC), 2018.
  69. K. Rajashekara and H. Krishnamoorthy, “Power electronics for subsea systems: Challenges and opportunities,” in 2017 IEEE 12th International Conference on Power Electronics and Drive Systems (PEDS), 2017, pp. 986–991.
  70. J. J. Sandoval, H. Krishnamoorthy, P. Enjeti, and S. Choi, “High power density adjustable speed drive topology with medium frequency transformer isolation,” in 2015 IEEE Energy Conversion Congress and Exposition (ECCE), 2015, pp. 6986–6992.
  71. J. Ramos-Ruiz, H. Krishnamoorthy, and P. Enjeti, “Adding capacity to an existing electric power distribution network using a solid state transformer system,” in 2015 IEEE Energy Conversion Congress and Exposition (ECCE), 2015, pp. 6059–6066.
  72. H. S. Krishnamoorthy, P. N. Enjeti, and P. Garg, “Simplified medium/high frequency transformer isolation approach for multi-pulse diode rectifier front-end adjustable speed drives,” in 2015 IEEE Applied Power Electronics Conference and Exposition (APEC), 2015.
  73. M. T. Daniel, H. S. Krishnamoorthy, and P. N. Enjeti, “An improved offshore wind turbine to MVDC grid interface using high frequency resonant isolation and input power factor control,” in 2015 IEEE Power and Energy Conference at Illinois (PECI), 2015, pp. 1–8.
  74. H. S. Krishnamoorthy, P. Garg, P. J. Kunwor, and P. N. Enjeti, “3-phase AC-DC converter topologies with higher frequency transformer isolation for utility grid interface,” in 2014 IEEE Applied Power Electronics Conference and Exposition-APEC 2014, 2014, pp. 1240–1247.
  75. J. T. Hawke, H. S. Krishnamoorthy, and P. N. Enjeti, “A multiport power sharing converter topology for renewable-to-grid interface,” in 2014 IEEE Energy Conversion Congress and Exposition (ECCE), 2014, pp. 4992–4999.
  76. Hafez, H. S. Krishnamoorthy, P. Enjeti, S. Ahmed, and I. J. Pitel, “Medium voltage power distribution architecture with medium frequency isolation transformer for data centers,” in 2014 IEEE Applied Power Electronics Conference and Exposition-APEC 2014, 2014, pp. 3485–3489.
  77. Hafez, H. S. Krishnamoorthy, P. Enjeti, U. Borup, and S. Ahmed, “Medium voltage AC collection grid for large scale photovoltaic plants based on medium frequency transformers,” in 2014 IEEE Energy Conversion Congress and Exposition (ECCE), 2014, pp. 5304–5311.
  78. Gu, H. S. Krishnamoorthy, P. N. Enjeti, and Y. Li, “Medium-voltage (MV) matrix converter topology for wind power conversion using medium-frequency transformer (MFT) isolation,” in 2014 IEEE Applied Power Electronics Conference and Exposition-APEC 2014, 2014, pp. 3084–3090.
  79. Gu, H. S. Krishnamoorthy, P. N. Enjeti, and Y. Li, “A novel medium-frequency-transformer isolated matrix converter for wind power conversion applications,” in 2014 IEEE Energy Conversion Congress and Exposition (ECCE), 2014, pp. 1070–1077.
  80. M. T. Daniel, H. S. Krishnamoorthy, and P. N. Enjeti, “A new wind turbine interface to MVDC grid with high-frequency isolation and input current shaping,” in IECON 2014-40th Annual Conference of the IEEE Industrial Electronics Society, 2014, pp. 1924–1930.
  81. H. S. Krishnamoorthy, D. Rana, and P. N. Enjeti, “A new wind turbine generator/battery energy storage utility interface converter topology with medium-frequency transformer,” in 2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC), 2013.
  82. S. Essakiappan, H. S. Krishnamoorthy, J. Ramos-Ruiz, P. Enjeti, M. Arifujjaman, and T. Singh, “Modeling and analysis of a micro-inverter configuration for high power phosphoric acid fuel cell application,” in 2013 IEEE Energy Conversion Congress and Exposition, 2013, pp. 1110–1117.
  83. P. Mazumdar, H. S. Krishnamoorthy, I. Manickam, R. S. Balog, and P. N. Enjeti, “Decision making framework for photovoltaic cell technologies using six sigma,” in 2012 38th IEEE Photovoltaic Specialists Conference, 2012, pp. 002449–002454.
  84. H. S. Krishnamoorthy, P. Mazumdar, I. Manickam, R. S. Balog, and P. N. Enjeti, “Decision making framework for solar photovoltaic power conditioning unit topologies using Six Sigma,” in 2012 38th IEEE Photovoltaic Specialists Conference, 2012, pp. 001352–001356.
  85. H. S. Krishnamoorthy, P. Garg, and P. N. Enjeti, “A new medium-voltage energy storage converter topology with medium-frequency transformer isolation,” in 2012 IEEE Energy Conversion Congress and Exposition (ECCE), 2012, pp. 3471–3478.
  86. H. S. Krishnamoorthy, P. Garg, and P. N. Enjeti, “A matrix converter-based topology for high power electric vehicle battery charging and V2G application,” in IECON 2012-38th Annual Conference on IEEE Industrial Electronics Society, 2012, pp. 2866–2871.
  87. H. S. Krishnamoorthy, P. N. Enjeti, I. J. Pitel, and J. T. Hawke, “New medium-voltage adjustable speed drive (ASD) topologies with medium-frequency transformer isolation,” in Proceedings of The 7th International Power Electronics and Motion Control Conference, 2012, vol. 2, pp. 814–819.
  88. H. S. Krishnamoorthy, S. Essakiappan, P. N. Enjeti, R. S. Balog, and S. Ahmed, “A new multilevel converter for megawatt scale solar photovoltaic utility integration,” in 2012 Twenty-Seventh Annual IEEE Applied Power Electronics Conference and Exposition (APEC), 2012.
  89. J. T. Hawke, H. S. Krishnamoorthy, and P. N. Enjeti, “A new utility-scale power converter for large fuel cell power plants with individual stack power control,” in 2012 Twenty-Seventh Annual IEEE Applied Power Electronics Conference and Exposition (APEC), 2012.
  90. S. Essakiappan, H. S. Krishnamoorthy, P. Enjeti, R. S. Balog, and S. Ahmed, “Independent control of series connected utility scale multilevel photovoltaic inverters,” in 2012 IEEE Energy Conversion Congress and Exposition (ECCE), 2012, pp. 1760–1766
  91. S. Essakiappan, H. S. Krishnamoorthy, P. Enjeti, R. S. Balog, and S. Ahmed, “A new control strategy for megawatt scale multilevel photovoltaic inverters under partial shading,” in 2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG), 2012, pp. 336–343.
  92. H. S. Krishnamoorthy, M. K. Vadali, and P. Supeda, “A novel, empirical equation—Based shunt active filter for harmonic elimination and power factor correction, using a modified PSO algorithm,” in 2011 Annual IEEE India Conference (INDICON), 2011, pp. 1–5.
  93. J. Hawke, P. Enjeti, L. Palma, and H. Sarma, “A modular fuel cell with hybrid energy storage,” in 2011 IEEE energy conversion congress and exposition, 2011, pp. 2971–2976.
  94. K. Sundareswaran, P. Bharathram, M. Siddharth, G. Vaishnavi, N. A. Shrivastava, and H. Sarma, “Voltage Profile enhancement through optimal placement of FACTS devices using Queen-Bee-Assisted GA,” in 2009 International Conference on Power Systems, 2009.

S. Yerra and H. S. Krishnamoorthy, “Multi–Phase 3–Level Buck Converter with Current Self -Balancing for High Bandwidth Envelope Tracking Power Supply” 2020 IEEE Applied Power Electronics Conference and Exposition (APEC), New Orleans, LA, Mar. 2020

S. Yerra, Y. Yao and H. S. Krishnamoorthy, "Single Stage Three-Level Interleaved Buck Converter with Current Self-Balancing for Improved Point-of-Load Performance", 2020 IEEE PESGRE, Cochin, India

Y. Yao, S. Yerra and H. S. Krishnamoorthy, "Linear Assisted DC/DC Converter for Pulsed Mode Power Applications", 2020 IEEE PESGRE, Cochin, India 

Solid State Transformer for Grid Interface of High Power Multi-Pulse Rectifiers, HS Krishnamoorthy, JJ Sandoval, PN Enjeti, Industrial Applications, IEEE Transactions on – Accepted, Early Access, 2018

Isolated AC – DC Converter using Medium Frequency Transformer for Off-Shore Wind Turbine DC Collection Grid, HS Krishnamoorthy, MT Daniel, J Ramos-Ruiz, PN Enjeti, Industrial Electronics, IEEE Transactions on, 2017

Wind Turbine Generator–Battery Energy Storage Utility Interface Converter Topology with Medium-Frequency Transformer Link, HS Krishnamoorthy, D Rana, P Garg, PN Enjeti, IJ Pitel, Power Electronics, IEEE Transactions on 29 (8), 4146-4155, 2014

Power Electronics for Subsea Systems: Challenges and Opportunities, K Rajashekara, HS Krishnamoorthy, Power Electronics for Distributed Systems (PEDS) Conference, 2017

Medium voltage power distribution architecture with medium frequency isolation transformer for data centers, B Hafez, HS Krishnamoorthy, P Enjeti, S Ahmed, IJ Pitel, Applied Power Electronics Conference and Exposition (APEC), 2014

A new wind turbine generator/battery energy storage utility interface converter topology with medium-frequency transformer, HS Krishnamoorthy, D Rana, PN Enjeti, Applied Power Electronics Conference and Exposition (APEC), 2013

A new multilevel converter for Megawatt scale solar photovoltaic utility integration, HS Krishnamoorthy, S Essakiappan, PN Enjeti, RS Balog, S Ahmed, Applied Power Electronics Conference and Exposition (APEC), 2012

Independent control of series connected utility scale multilevel photovoltaic inverters, S Essakiappan,  HS Krishnamoorthy, P Enjeti, RS Balog, S Ahmed, Energy Conversion Congress and Exposition (ECCE), 2012

New medium-voltage Adjustable Speed Drive (ASD) topologies with medium-frequency transformer isolation, HS Krishnamoorthy, PN Enjeti, IJ Pitel, JT Hawke, Power Electronics and Motion Control Conference (IPEMC), 2012

A matrix converter-based topology for high power electric vehicle battery charging and V2G application, HS Krishnamoorthy, P Garg, PN Enjeti, IECON 2012-38th Annual Conference on IEEE Industrial Electronics Society, 2012

A new utility-scale power converter for large fuel cell power plants with individual stack power control, HS Krishnamoorthy, JT Hawke, PN Enjeti, Applied Power Electronics Conference and Exposition (APEC), 2012

A new medium-voltage energy storage converter topology with medium-frequency transformer isolation, HS Krishnamoorthy, P Garg, PN Enjeti, Energy Conversion Congress and Exposition (ECCE), 2012

Articles/Book Chapters

Enjeti, Prasad; Garg, Pawan; Krishnamoorthy, Harish Sarma: 'Fault-tolerant adjustable speed drive systems' (Energy Engineering, 2015), 'Reliability of Power Electronic Converter Systems', Chap. 12, pp. 303-354, DOI: 10.1049/PBPO080E_ch12
https://digital-library.theiet.org/content/books/10.1049/pbpo080e_ch12

Patent/Patent Applications
S. C. Komati, and H. S. Krishnamoorthy (2012). Systems and Methods for Temperature Compensation in Utility Meter. Granted U.S. Patent No. 9,304,014 (B2). Washington, DC: U.S. Patent and Trademark Office.
H. S. Krishnamoorthy, and J. T. Hawke (2022). Onboard circuits and methods to predict the health of critical elements (U.S. Patent Application 17/961,854 filed in Oct. 2022)
H. S. Krishnamoorthy, and J. Hawke (2022). Systems and Methods to Predict Remaining Useful Lifetime of Electronics (U.S. Patent Application 17/961,803 filed in Oct. 2022)
H. S. Krishnamoorthy, and Y. Yao (2022). Compact Pulsed Power Supplies (U.S. Patent Application 17/945,811 filed in Sep. 2022)
D. G. Rouaud, H. S. Krishnamoorthy, and M. K. Vadali (2011). Integrated electric meter with var capability. U.S. Patent Application No. 2012-0,169,300 (A1). Washington, DC: U.S. Patent and Trademark Office.
Invited Talks
[1] “Reliability Characterization and In-Situ Health Estimation of WBG Semiconductor-Based Power Converters” – invited talk at the Power Electronics and Energy Conversion workshop organized by the Sandia National Laboratories (SNL), New Mexico, USA in Aug. 2023
[2] “Solid State Transformers (SSTs) for Distributed Energy Applications” – invited webinar for Thapar Institute of Engineering & Technology (TIET), Punjab, India, as a part of IEEE PELS DAY celebrations in Jun. 2023
[3] “Powering critical applications on earth, moon, and beyond” – seminar for the faculty and students at the Indian Institute of Space Science and Technology (IIST), Thiruvananthapuram, Kerala, India, Dec. 2022
[4] “DC – DC Converters in Electric Vehicle Applications” – webinar for the faculty and students at the National Institute of Technology (NIT), Jamshedpur, India, Nov. 2022
[5] “Power converters: system characterization, modeling and performance prediction” – webinar for the student chapter of the IEEE Systems, Man, and Cybernetics Society at Malaviya National Institute of Technology (NIT), Jaipur, Rajasthan, India, Aug. 2022
[6] “Advances in Solid State Transformers and Machine Learning in Renewable Energy Applications” –Keynote talk at the IEEE ICFCR-2022 international conference, Kerala, India, Jul. 2022
[7] “Power converters: system characterization, modeling and performance prediction” – webinar for the student chapter of the IEEE Systems, Man, and Cybernetics Society at Malaviya National Institute of Technology (NIT), Jaipur, Rajasthan, India, May 2022
[8] “Advances in Solid State Transformers and Machine Learning in Renewable Energy Applications” –Keynote talk at the IEEE ICFCR-2022 international conference, Kerala, India, Jul. 2022
[9] “Future Electric Grid with High Renewable Penetration” – webinar for the IEEE PES/IAS joint Student Branch Chapter, Indian Institute of Technology (IIT), Mandi, India, May 2022
[10] “Overview of renewable power generation systems and their control” – webinar for Faculty Development Program (FDP), Vimal Jyothi Engineering College, Kerala India, Apr. 2022
[11] “Electric Vehicles: Background, Architecture and Power Conversion Systems” – Inauguration and Keynote talk at the ICETEVST-22 international conference, SRM-Tiruchirappalli, India, Apr. 2022
[12] “Future Electric Grid with Power Electronics based Utility Interface” – invited talk at the National Workshop on Grid Power Electronics Technologies @IIITDM Kancheepuram, Chennai, India, Feb. 2022
[13] “Future Electric Grid with High Renewable Penetration” – webinar for IEEE IAS student branch chapter (SBC), National Institute of Technology- Calicut, Kerala, India, Dec. 2021
[14] “Potential opportunities for higher education in the US & Exploring about IEEE, PELS” – invited webinar for IEEE SBC Panimalar Institute of Technology in Oct. 2021
[15] “Future Electric Grid with High Renewable Penetration” – invited webinar for the Department of EEE, SRM TRP Engineering College and IEEE student branch chapter (SBC), SRM TRP Engineering College in Oct. 2021
[16] “Future Electric Grid with High Renewable Penetration” – invited webinar for IEEE MACE SBC, Kerala in Aug. 2021
[17] “Electric Grid and Renewable Energy” – invited technical talk for Performatica in Aug. 2021
[18] “Power Electronics for Renewable Energy Systems” – invited webinar for IEEE RSET SBC in collaboration with IEEE IA/IE/PELS Jt. Chapter, Kerala as a part of IEEE PELS DAY celebrations in Jun. 2021
[19] “Electric Vehicles: Architectures and Technologies” – invited webinar for IEEE SBC Panimalar Institute of Technology as a part of IEEE PELS DAY celebrations in Jun. 2021
[20] “Introduction to Electric Vehicles” – faculty development program (FDP) lecture at the National Institute of Technology (NIT) Tiruchirappalli, India in Jun. 2021
[21] “DC – DC Converters in Electric Vehicle Applications” – faculty development program (FDP) lecture at the NIT Tiruchirappalli, India in Jun. 2021
[22] “Energy Storage Systems for Future Electric Grids with High Renewable Penetration” – Keynote address at India AICTE sponsored i-SMaRT conference, Kerala, in Apr. 2021
[23] “Electrification of Rail and Sea Transportation” – invited webinar via UH Energy for Evolve Houston in Feb. 2021
[24] “Isolated DC-DC Converters for Electric Vehicles” – faculty development program (FDP) lecture at the National Institute of Technology (NIT) Calicut, India in Jan. 2021
[25] “Advances in Solid State Transformers and Machine Learning for Renewable Energy Applications” – Keynote address at Springer MARC Conference in Dec. 2020
[26] “IEEE Young Professionals – Opportunities and Operations” – at IEEE India Council’s AISYWLC Conference, in Dec. 2020
[27] “Solid State Transformers and Their Applications in Offshore Energy Systems” – at IEEE Hyderabad Section, India in May 2020
[28] “Solid State Transformers and Their Applications in High Power Renewable Energy Systems” – at IEEE Kerala Section, India in May 2020
[29] “India: Opportunities for Capability Building in New Power Electronic Technologies” – at IEEE Hyderabad Section, India in May 2020
[30] “Solid State Transformers and Their Applications in Marine Energy Systems” – at IEEE Marine Energy Systems Day, IEEE Galveston Bay Section PES Chapter in Apr. 2020
[31] “IEEE Power Electronics Society (PELS) – Opportunities for Students and Young Professionals” – at IEEE PESGRE Conference, India in Jan. 2020
[32] “Renewable Energy and Distributed Power Generation” – 2 week course to the students and faculty of NIT Warangal, India in Dec. 2019
[33] “Smart and Reliable Power Conversion for Modern Applications” – at IEEE sponsored National Power Electronics Conference (NPEC) at NIT Tiruchirappalli, India in Dec. 2019
[34] “Opportunities for Young Professionals in IEEE Power Electronics Society” – at NIT Warangal, India in Dec. 2019
[35] “Current and Future Trends in the Area of Power Conversion” – at CDAC, Ministry of Electronics and Information Technology, Govt. of India in Dec. 2019
[36] “Opportunities for Research and Education in the United States” – at NIT Warangal, India in Dec. 2019
[37] “Modern Trends and Agile Practices in Power Conversion” – Keynote Speech at Schlumberger Technology Workshop in Nov. 2019
[38] “Solid State Transformers: Technology for a Smarter Power Conversion” – at Toshiba Corporation in May 2019
[39] “Solid State Transformer (SST): Technology for a Smarter Grid” – at CenterPoint Energy in Feb. 2019
Presentations
Presentation on Electric Vehicles: https://prezi.com/view/Z9OOMAaWR7Heh2d06LUl/