Sahil Gaurav

I'm

About

I am a Ph.D. student in Power Engineering specialisation at Indian Institute of Technology Guwahati. I joined this program in July 2021 under the supervision of Dr. Chandan Kumar, and awarded with prestigious prime minister's research fellowship in the December 2021 (Cycle 8).

Research Area:

I am working on "Smart Transformer based Electric Vehicle Charging Station Infrastructure in Flexible Distribution System", whose primary objectives are:

  • To develop a meshed hybrid microgrid having electric vehicle charging stations interfaced through smart transformer.
  • To propose a new multifunctional EV charger for off-board charging which is modular, bi-directional, energy efficient, and having dynamic adaptation capability.
  • To propose a new controlled strategy for optimal battery charging solutions for electric vehicle.

I pursued M.Tech degree in Electrical Engineering from Indian Institute of Technology Bhilai, in the year 2021. I received B.Tech degree in Electrical Engineering from Bhagalpur College of Engineering, Bhagalpur, in the year 2019.

brief overview

The state-of-the-art ev-charging stations are supplied from the three-phase LV distribution grid, using up to 400-V line to line voltage as an input. This voltage is typically generated by a dedicated MV-to-LV service transformer. The bulky service transformer increases the size and cost of the system while adding complexity to the installation.

To eliminate the need of the MV-to-LV transformer, a power electronics-based smart transformer (ST) can be used to interface the MV grid directly. The term ST has been loosely used to refer to the concept of replacing line-frequency transformers with power electronics converters that provide voltage conversion and galvanic isolation using high-frequency transformers. Compared with the traditional line-frequency transformer, the ST has a number of unique features such as better controllability, current limiting capabilities, and higher efficiency. Many STs proposed in literature convert the MV ac input into an LV ac output by three conversion stages. The first stage is an active front end that rectifies the line-frequency MV ac input into dc voltage. Then, an isolated dc/dc stage converts the dc voltage to create a dc bus at a desired voltage level while providing galvanic isolation. The final stage inverts the dc voltage into a line-frequency LV ac output. The three-stage design of ST explicitly creates two dc buses that can interface PVs, battery energy storage systems, EVs, and other dc sources and loads. In the context of EV charging stations, the ST converts the MV ac voltage into an LV dc voltage while providing galvanic isolation by using a high-frequency transformer inside the SST. As the operating frequency of the high-frequency transformer is much higher than the service transformer (tens of kilohertz versus line frequency), the size of the high-frequency transformer is much smaller than that of the service transformer. Replacing the traditional low-frequency transformer and rectifier with an ST provides higher conversion efficiency and significant space savings compared with the state-of-the-art approach. The higher efficiency leads to power savings for the infrastructure owner that can be passed on to the EV owner. The reduced system footprint provides better utilization of the charging station site. This becomes increasingly important as the charging capabilities of the EV batteries improve, and the penetration of EVs increases.

Resume

Summary

Sahil Gaurav

I am working in the power engineering domain since Aug. 2019. I had experience of teaching assistant in more than five UG and PG courses of power engineering domain. I am always been very perspicuous in maintaining my aim of establishing myself as a strong researcher.

  • Roll No. 216102022, Prime Minister’s Research Fellow, Dept. of EEE, Indian Institute Of Technology, Guwahati
  • +91-8507610151
  • sahilgaurav@iitg.ac.in, sahilgauravbce@gmail.com

Education

Master of Technology (Electrical Engineering)

2019 - 2021

Indian Institute of Technology Bhilai

M.Tech Project: Virtual Inertia based Enhanced Droop Control and Active Islanding Detection for Parallel Inverters in Microgrid.

Guide: Dr. Prashant Agnihotri

CGPA: 9.5

Bachelor of of Technology (Electrical Engineering)

2015 - 2019

Bhagalpur College of Engineering, Bhagalpur

CGPA: 9.25 (State University Gold Medalist)

Positions of Responsibility

Teaching Assistant (TA)

2020 - Present

NPTEL, IIT Guwahati, & IIT Bhilai

  • Conducted live tutorial session for the NPTEL course (noc22-EE81): DC Microgrid and Control Systems
  • Responsible for lab management while coordinating with fellow TAs and research scholars in the faculty development program (FDP) and student training program (STP), organised by CSVTU and Department of EECS, IIT Bhilai. Courses: Power Electronics and Power System Analysis
  • Mentoring and assessing students in different semesters at IITBH for the courses EE523: Power System Analysis; EE509: Power Electronics; EE205: Power Engineering - 1.
  • Mentoring and assessing students in different semesters at IITG for the courses EE696: Power Electronic Systems for Electric Vehicles; EE672: Electrical Power Quality and Reliability.

IEEE Activities

  • IEEE Graduate Student Member in PELS, IAS, IES, PES (2020 ~ present).
  • Chair of IEEE IAS SBC at the Indian Inst of Tech-Guwahati (SBC61571C). (Aug. 2023 ~ Present)
  • Secretary of IEEE PELS SBC at the Indian Inst of Tech-Guwahati (SBC61571D). (Aug. 2023 ~ Present)
  • Webmaster of IEEE IES SBC at the Indian Inst of Tech-Guwahati.(Aug. 2023 ~ Present)

Scholastic Achievements

  • Invited by Prof. Dr.-Ing. Marco Liserre to Kiel University, Christian-alberchts-Universitat (CAU) zu Kiel, at the Chair of Power Electronics for a period of three months (January 1st, 2024 to March 31st, 2024) under the Alxendar von Humboldt Foundation Research Group Linkage Programme.
  • Reviewer for the conferences, ONCON 2023, NPEC 2023.
  • Reviewer for the prestigious “IEEE Access” Journal.
  • Achieved 97.34 percentile in GATE Electrical Engineering (EE) with GATE Score 596, and AIR - 2331.
  • Received Gold Medal from Governor of Bihar for becoming B.Tech state university topper.
  • Received Gold Medal from Governor of Bihar for B.Tech major project on the occassion of World Youth Skills Day.
  • Represented the district Nalanda as a Junior Scientist in the 19th State Children’s Science Congress at the state level.

Publications

Accepted

  • Sahil Gaurav, Chandan Kumar, “Virtual Oscillator Control of Smart Transformer based Meshed Low Voltage Distribution Grid.” in 2023 IEEE Energy Conversion Congress and Exposition (ECCE), October 29-November 2, 2023, Nashville, Tennessee, USA.
  • Sahil Gaurav, Chandan Kumar and Ashish Meena, “LCL-LCL Topology based Resonant Inductive Wireless Power Transfer System.” in 11th National Power Electronics Conference (NPEC), IIT Guwahati, India, 14-16 Dec. 2023.
  • Sahil Gaurav, Chandan Kumar and Ashish Meena, “Coil Coupling Design for Resonant Inductive Wireless Power Transfer System.” in 11th National Power Electronics Conference (NPEC), IIT Guwahati, India, 14-16 Dec. 2023.
  • Sanjay Kumar Sahu, Shwet Prasoon, Sahil Gaurav and Chandan Kumar, “Operation and Control of Modular Multilevel DC-DC Converter for EV Charging Application.” in 11th National Power Electronics Conference (NPEC), Guwahati, IIT Guwahati, India, 14-16 Dec. 2023.

Published

  • Sahil Gaurav and Chandan Kumar, “Coordinated Control of EV Charging Stations in Smart Transformer based Microgrid.” 2022 22nd National Power Systems Conference (NPSC), pp. 590-595. IEEE, 2022.
  • Sahil Gaurav and Prashant Agnihotri, "Active Islanding Detection with Parallel Inverters in Microgrid," 2021 9th IEEE International Conference on Power Systems (ICPS), 2021, pp. 1-6, doi: 10.1109/ICPS52420.2021.9670356.
  • Sahil Gaurav and Prashant Agnihotri, "Enhanced Droop Control Technique for Parallel Distributed Generations in AC Microgrid." In Proceedings of Symposium on Power Electronic and Renewable Energy Systems Control, pp. 429-438. Springer, Singapore, 2021.
  • Shwet Prasoon, Sahil Gaurav, Devendra Kumar and Chandan Kumar, “Modular Multilevel DC-DC Converter Based EV Battery Charger.” 2022 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), pp. 1-6. IEEE, 2022.

Contact

Location:

Smart Energy Conversion Laboratory

New Extension Block, EEE Department, IIT Guwahati, Guwahati-781039, INDIA.

Call:

+91 850710151

Loading
Your message has been sent. Thank you!