Ratna Rahul Tupakula

• Maintained energy and enthusiasm in fast-paced environment.
• Worked with customers to understand needs and provide excellent service.
• Used critical thinking to break down problems, evaluate solutions and make decisions.
• FBD based converter control logic development implementation.
• Automation scripts preparation for software testing.
• Battery Management Systems using canopen for traction control.

• Took attendance, graded assignments and maintained student records to assist teachers with administrative tasks and maintain smooth daily operations.
• Collaborated with colleagues on curriculum revision, evaluation of course syllabi and lesson plans for Electrical Engineering curriculum.
• Helped struggling students by providing support outside of classrooms and consistently checking in on progress.
• Developed a generalized MLI for PV based grid connected Applications.
• Study and development of fast charging topologies for Electric Vehicles.
• Teaching and guiding projects of U.G. and P.G.

Journal:

• Ratna Rahul Tupakula, “A Generalized Single Phase Cascaded Multilevel Inverter with Reduced Switch Count”, Electrical Engineering (2020).

• Used variety of learning modalities and support materials to facilitate learning process and accentuate presentations.
• Took attendance, graded assignments and maintained student records to assist teachers with administrative tasks and maintain smooth daily operations.
• Collaborated with colleagues on curriculum revision, evaluation of course syllabi and lesson plans for Control Systems curriculum.
• Helped struggling students by providing support outside of classrooms and consistently checking in on progress.
• Developed case studies related to high penetration of renewables and single stage controller for renewable integrated Microgrids.
  Publication:
  Book Chapter:
  T. Ratna Rahul, “Model Predictive Control Based Inverter to Enhance the Performance under Grid Frequency Variations, Chapter 12, Recent Advances in Power Electronics and Drives, vol.707, Lecture Notes in Electrical Engineering, Springer, Singapore.

• Documented procedures and results with high degree of accuracy and precision.
• Guided students in researching, structuring and presenting debate case.
• Stayed abreast of developments within smart controllers for microgrids to improve curriculum, develop new research and share with colleagues and students
• Conducted engaging in-class discussions to facilitate learning and encourage participation.
• Design and development of tuning free adaptive controller for grid and off grid connected inverters.
• Design and development of single stage controllers for grid connected inverters.
• Design and development of single stage grid synchronization methodology.
• Design and development of solutions to problems related to high renewable penetrations.
  Publications:
  Journals:
  • Perumalla Chandra Sekhar and T. Ratna Rahul: “Model Predictive Controller for Single Phase Distributed Generator with Seamless Transition between Grid and Off-Grid Modes”, IET Generation, Transmission & Distribution, 2019, vol. 13, no. 10, pp. 1829-1837, 21 5 2019.
  • T. Ratna Rahul and P. C. Sekhar, “Investigation of Current Reference Schemes for Control of Single Phase Inverter using Model Predictive Control and Asynchronous Sigma Delta Modulation”, Institution of Engineers India, vol. 100, no. 5, pp. 461-470, October 2019.
  Conferences:
  • T. Ratna Rahul and D. M. Vinod Kumar: “Distributed Control Strategy for the Coordinated Control Operation of the Distributed Generators”. 2018 8th IEEE India International Conference on Power Electronics (IICPE), JAIPUR, India, 2018, pp. 1-6.doi: 10.1109/IICPE.2018.8709600.
  • T. Ratna Rahul and Perumalla Chandra Sekhar: “Investigation of Current Reference Schemes for Control of Single Phase Inverter using Model Predictive Control”. National Conference on Hybrid AC/DC Power Systems for effective utilization of Renewable Energy (IEI-NCEE 2017), 24 – 25 November 2017, NIT Tiruchirappalli, India.
  • P. C. Sekhar, S. Pandit and Ratna Rahul T., "Analysis of asynchronous sigma-delta modulation scheme for real and reactive power control in grid connected single phase inverters," 2016 IEEE Power and Energy Society General Meeting (PESGM), Boston, MA,2016, pp. 1-5.doi: 10.1109/PESGM.2016.7741630.
  • P. C. Sekhar and T. R. Rahul, "Analysis of model predictive control for the active and reactive power in three phase grid connected inverters," 2016 International Conference on Next Generation Intelligent Systems (ICNGIS), Kottayam, India, 2016, pp. 1-5.

• Controlled project costs by approving expenditures.
• Adhered to timelines to meet quality assurance targets.
• Determined project specifications by thoroughly studying performance standards, requirements and technical studies.
• Identified needed parts to keep equipment in top operating condition.
• Sizing and Selection of Components like IGBT Module, DC –Link Capacitors, Bus bars, Sensors, HV & LV Connectors, X-Capacitors, Y- Capacitors, Passive discharge, and active discharge circuits.
• Mathematical modeling and simulation of traction motor inverter drive. Power Loss calculation for heat sink design and performance optimization.

• Participated in creation and maintenance of project tracking tools, verifying clear communication of inherent expectations and responsibilities.
• Assisted in assembling project documentation for project manager, confirming inclusion of data and preliminary information.
• Participated in on-the-job training, working closely with supervisors and coworkers and asking appropriate questions.
• Shadowed senior team members to learn all related jobs and tasks.