Graduate Research Assistant (GRA)
Tennessee Technological University, TN, USA
Tennessee Tech delivers enduring education, impactful research, and collaborative service.
About Me
I'm Sohag Kumar Saha, currently working as a Graduate Teaching Assistant at the Dept. of Electrical and Computer Engineering (ECE) at Tennessee Technological University, TN, USA towards my Ph.D. in Engineering degree. My research interests include: Smart Grid Systems, Integration of Renewable Energy, Energy Storage Systems, PV Hosting Capacity, Peak Shaving, Economic Load Dispatch, Optimization using Meta-heuristic Algorithms and application of Machine Learning in Smart Grids.
Earlier, I have completed my B.Sc. in Electrical & Electronic Engineering (EEE), from Pabna University of Science & Technology (PUST), Pabna, Bangladesh in Jan, 2014. I am glad to share that, I secured the 1st Class 1st position in the class among 52 students based on merit with CGPA 3.87 (on a scale of 4.00).
After completing graduation from the Department of Electrical & Electronic Engineering of Pabna University of Science & Technology (PUST), Bangladesh; I started my career in my own start up named Cloud Tech BD, which is currently one of the leading IT firm in Pabna district of Bangladesh. As a CO-Founder of Cloud Tech BD, I received a lot experiences in problems solving, leadership skills and management of an organization. Then, I switched to Bangladesh Rural Electrification Board (BREB), Dhaka as an Assistant Engineer, which is the largest electricity distribution utility in Bangladesh. After that, I have worked at Ashuganj Power Station Company Ltd. as a Sub-Divisional Engineer (Electrical) for more than 5 years, which is the 2nd largest power generating station of Bangladesh. Those professional experiences have enriched my technical knowledge, developed leadership skills and improved problem solving abilities. After gaining professional experiences of about 6 years in some top organizations in Bangladesh, I would like to develop thriving career in research oriented academia which has always been my long cherished dream, therefore working on my interested domain of research for accomplishing my higher degree through research.
Professional Experiences
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2021 Present
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2022 Present
Graduate Teaching Assistant (GTA)/Instructor
Tennessee Technological University, TN, USA
TA/Instructor for Intro to Digital Design Lab (ECE 2140/3160)
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2020 2021
Sub-Divisional Engineer (SDE), Electrical, Sub-Station Maintenance Division
Ashuganj Power Station Company Ltd. (APSCL), B.Baria, Bangladesh
The vision of APSCL is - "To become the leader in power generation in Bangladesh in line with the government's target to provide electricity to all" and the mission of APSCL is- "Empowering Bangladesh by expanding the company's power generation capacity to meet the growing demand of the country through efficient and effective management of facilities and acquisition of capabilities for providing quality electricity"
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2016 2020
Assistant Engineer (AE), Electrical, Sub-Station Maintenance Division
Ashuganj Power Station Company Ltd. (APSCL), B.Baria, Bangladesh
APSCL is the second largest power generation organization in Bangladesh in Government Sector
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2016 2016
Assistant Engineer (Electrical), Sub-Station Construction and Monitoring Division
Bangladesh Rural Electrification Board (BREB), Bangladesh
BREB is the largest power distribution utilities in Bangladesh
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2016 2016
Assistant General Manager (AGM), Operation and Maintenance
Sunamganj PBS, Bangladesh Rural Electrification Board (BREB), BD
BREB is the largest power distribution utilities in Bangladesh
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2015 2016
Assistant Engineer (Switching Sub-Staton Construction for Rural Electrification Program)
Bangladesh Rural Electrification Board (BREB), BD
BREB is the largest power distribution utilities in Bangladesh
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2013 2015
Co-Founder and CEO
Cloud Technology BD, Pabna, Bangladesh
Committed to Deliver Unique Services through IT, Web Application, Web Design, Web Development and Software Development
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2013 2015
Freelance Web Developer
Upwork (Former Odesk and Elance), Freelancer and Fiverr (Level-2)
Professional Web Design and Development Services at Affordable Budget
Educational Background
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Ph.D. in Engineering 2021-2024
Ph.D. in Electrical & Computer Engineering
Graduate School
Tennessee Technological University, TN, USA -
B.Sc. Engineering2009-2013
B.Sc. in Electrical & Electronic Engineering
Pabna University of Science & Technology, Pabna, Bangladesh
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H.S.C. Examination2006-2008
Group of Science
Government Debendra College, Manikganj, Bangladesh
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S.S.C. Examination2001-2006
Group of Science
Batila High School, Manikganj, Bangladesh
Honors, Awards and Scholarships
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2022Bangladesh Sweden Trust Fund Scholarship
Received the prestigious Bangladesh Sweden Trust Fund Scholarship which is covered the travel grant from Bangladesh to USA for persuing PhD in Tennessee Tech.,USA
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2021Graduate Assistantship Award for PhD Study
Received fully funded PhD scholarship as Graduate Assistantship from Tennessee Tech University, TN, USA.
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2014University Gold Medal- Academic Achievement Award
University Gold Medal Award from Pabna University of Science and Technology due to Outstanding academic result in B.Sc. in Engineering Examination. My merit position was 1st Class 1st in the class among 52 students with CGPA 3.87 (Scale of 4.00).
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2014BASIS Outsourcing Award- Best Freelancer of the Year-2014
Won the BASIS ( Bangladesh Association of Software and Information Services) Award in 2014 for my outstanding performance on Outsourcing Web development works in the previous year i.e. 2013. It's one of the first achievement of my career and glad to receive such kind of recognition from the top authority of the country.
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2013Secured 1st position based on merit in all academic terms during Bachelor level
I am very happy to share that, I secureds the first position in the dept. of Electrical and Electronic Engineering at Pabna University of Science and Technology consecutively in all academic terms (from first semester to 8th semester). To the best of my knowledge, I was the only student of our session of Pabna University of Science & Technology (PUST), who secured the top position in all academic terms. Thanks to almighty, my parents, teachers, friends and well wishers, because without the support of them, it would not be possible to keep the successful journey. I am now looking forward to acheiving more in my future to build a successful career in Electrical Engineering.
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2009-2013University Merit Scholarship from EEE Dept. of PUST
Recipient of Merit based scholarship from EEE department of PUST. It was my pleasure to be proud member of the dept. of Electrical & Electronic Engineering (EEE) of Pabna University of Science & Technology (PUST), BD.
Research Domains
Current Research Interests
- Renewable Energy Integration
- Micro-grid & Smart-Grid
- Economic Load Dispatch
- Metaheuristic Optimization Problems
- Peak Shaving Strategies/Analysis
- PV Hosting Capacity analysis
- Hardware in Loop (HIL) using Typhoon
- Power System Operation & Planning
- Energy Storage Devices
- Power Electronics Converters/Inverters
- Power Quality & System Protection
- AI and ML in Power Systems
Software Skills
- MATLAB Programming & Simulink
- Typhoon HIL Simulation
- OpenDSS Simulation
- C & C++ Programming
- Python Programming
- LATEX & MS Word
- MS Excel, Visio & Powerpoint
- ADS (Advanced Digital Design)
- PLECS & LTSpice
- Digital Tool
- Waveforms (Analog Discovery 2)
- Anysys Electromagnetics
Selected Publications
The selected publication list is added in the following section.
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Multivariate Optimal Hybrid Deep Learning Model for Forecasting of Day-Ahead Solar Irradiance with Meteorological Constraints
Conference Paper 2024 IEEE North American Power Symposium (NAPS), October 13-15, Year: 2024
Abstract
With the growing integration of solar power generation into smart grids, accurate solar irradiance forecasting is of paramount importance for efficient grid operation and renewable energy management. In this paper, a data decomposition approach with two different methods of deep learning and grid search optimization was combined to develop a better hybrid model to forecast solar irradiance. The proposed model combines spatial and temporal information to improve forecasting accuracy by considering the impact of meteorological constraints such as global horizontal irradiance, temperature, relative humidity, wind speed, cloud type, direct normal irradiance, diffuse horizontal irradiance, and solar zenith angle. In addition to the model architecture, this work incorporates hyper-parameter optimization to fine-tune the parameters of the model for optimal performance. The design of the model ensures that the system adapts to the specific characteristics of the solar irradiance data and meteorological conditions under consideration. The proposed hybrid model was evaluated using real-world data to outperform traditional forecasting methods in terms of accuracy. The results of the proposed hybrid model indicate better prediction ability as measured by four parameters (lower RMSE and MAE, fewer epochs, and a higher \({R^2}\) co-efficient).
Implementing Man-in-the-Middle Attack to Investigate Network Vulnerabilities in Smart Grid Test-bed
Conference Paper 2023 IEEE World AI IoT Congress (AIIoT), Year: 2023
Abstract
The smart-grid introduces several new data-gathering, communication, and information-sharing capabilities into the electrical system, as well as additional privacy threats, vulnerabilities, and cyber attacks. In this study, Modbus is regarded as one of the most prevalent interfaces for control systems in power plants. Modern control interfaces are vulnerable to cyber-attacks, posing a risk to the entire energy infrastructure. In order to strengthen resistance to cyber attacks, this study introduces a test bed for cyber-physical systems that operate in real-time. To investigate the network vulnerabilities of smart power grids, Modbus protocol has been examined combining a real-time power system simulator with a communication system simulator and the effects of the system presented and analyzed. The goal is to detect the vulnerability in Modbus protocol and perform the Man-in-the-middle attack with its impact on the system. This proposed testbed can be evaluated as a research model for vulnerability assessment as well as a tool for evaluating cyber attacks and enquire into any detection mechanism for safeguarding and defending smart grid systems from a variety of cyberattacks. We present here the preliminary findings on using the testbed to identify a particular MiTM attack and the effects on system performance. Finally, we suggest a cyber security strategy as a solution to address such network vulnerabilities and deploy appropriate countermeasures.
Anomaly Detection Techniques in Smart Grid Systems: A Review
Conference Paper 2023 IEEE World AI IoT Congress (AIIoT), Year: 2023
Abstract
Smart grid data can be evaluated for anomaly detection in numerous fields, including cyber-security, fault detection, electricity theft, etc. The strange anomalous behaviors may have been caused by various reasons, including peculiar load usage patterns of the consumers, grid infrastructure issues, blackouts, outside cyberattacks, or energy fraud. Recently, anomaly detection of the smart grid has attracted a large amount of interest from researchers, and it is widely applied in a number of high-impact fields. Implementing effective anomaly detection for a variety of aberrant behaviors is one of the smart grid's biggest challenges. In the context of smart grids, we provide a scoping overview of research from recent advances in anomaly detection in this work. We categorize our study from numerous aspects for deep understanding and inspection of the research challenges so far. Finally, after analyzing the gap in the reviewed paper, the direction for future research on anomaly detection in smart-grid systems has been provided briefly.
A New Era of Mobility: Exploring Digital Twin Applications in Autonomous Vehicular Systems
Conference Paper 2023 IEEE World AI IoT Congress (AIIoT), Year: 2023
Abstract
Digital twins (DTs) are digital copies of real-world items or processes that can learn from their surroundings to more accurately reflect, validate, and mimic the physical twin’s behavior in the here and now and into the future. DTs are becoming increasingly prevalent in a variety of fields, including manufacturing, automobiles, medicine, smart cities, and other related areas. In this paper, we presented a systematic review of DTs in the autonomous vehicular industry. We addressed DTs and their essential characteristics, emphasizing accurate data collection, real-time analytics, and efficient simulation capabilities while highlighting their role in enhancing performance and reliability. Next, we explored the technical challenges and central technologies of DTs. We illustrated the comparison analysis of different methodologies that have been used for autonomous vehicles in smart cities. Finally, we addressed the application challenges and limitations of DTs in the autonomous vehicular industry.
Acute lymphoblastic leukemia detection approach from peripheral blood smear using color threshold and morphological techniques
Journal Paper International Journal of Electrical & Computer Engineering (ISSN: 2088-8708), Volume 12, Issue 4, Year: 2022
Abstract
Acute lymphoblastic leukemia (ALL) has recently been one of the most significant concerns in cancers, especially child and old age. Therefore, crying needs to diagnose leukemia as early as possible, increasing the treatment options and patient survivability. Some basic handicraft leukemia detection processes have been introduced in this arena though these are not so accurate and efficient. The proposed approach has been introduced an automated ALL recognition system from the peripheral blood smear. Initially, the color threshold has been applied to segment lymphocytes blood cells from the blood smear. Some post-processing techniques like morphological operation and watershed have been executed to segment the particular lymphocytes cell. Finally, we used a support vector machine (SVM) classifier to classify the cancerous image frames using a statistical feature vector obtained from the segmented image. The proposed framework has achieved the highest accuracy of 99.21%, the sensitivity of 98.45%, specificity of 99%, the precision of 99%, and F1 score of 99.1%, which has beat existing and common states of art methods. We are confident that the proposed approach will positively impact the ALL detection arena.
Efficient Rectenna Design for Harvesting Microwave Power from SSPS System
Conference Paper 2nd International Conference on Electrical & Electronic Engineering (ICEEE), Year: 2017
Abstract
The purpose of this work is to design an efficient and simple ground based rectenna system for receiving microwave power. The performance of designed system is tested in Advanced Design System (ADS) simulation environment. This system can receive microwave power from Space Solar Power Satellite (SSPS) system and convert microwave energy into Direct Current (DC). The ground based rectenna consists of microstrip patch antenna array with rectifier circuit using Schottky diode. The rectifier circuit consists of low pass filter, diode, matching circuit and Dickson charge pump voltage multiplier circuit. This multiplier circuit increases output voltage considering small input power. In this paper, 8 elements microstrip patch antenna array operated at 2.45 GHz frequency with high efficient rectifier circuit is designed. The simulation results show better gain and directivity of proposed rectenna system which increase the performance of existing SSPS systems.
Novel approach of antenna array with beam steering technology for microwave power transmission from SSPS system
Conference Paper 2nd International Conference on Electrical, Computer & Telecommunication Engineering (ICECTE), Year: 2016
Abstract
A novel approach of antenna array with beam steering technology is addressed in this paper which can transmit microwave power from Space Solar Power Satellite (SSPS) system. Array antennas are critically important component in the development of future wireless systems with applications in communications, radar and satellite technologies. The Microwave Power Transmission (MPT) technology is a key technique for SSPS system, which is being highlighted as a technology capable of solving global environment problem as well as the energy problem. This paper presents a robust technique for MPT which is able to steer the main beam at any desired direction in the presence of array imperfections. The proposed beamforming technique is proficient to cancel the directional interferences. The simulation results show that the proposed SSPS scheme has better performance than the existing systems.
Design & Simulation of 8-Shape Slotted Microstrip Patch Antenna
Journal Paper World Applied Sciences Journal (WASJ), Volume 31, Issue 6, March 2014, Pages 1065-1071, ISSN:1818-4952, Year: 2014
Abstract
This paper presents an 8-shape slotted microstrip patch antenna. The antenna is fed by microstrip transmission line. The proposed antenna is simulated with the help of commercially available GEMS software based on the parallel FDTD algorithm. The antenna is designed by FR4 substrate and ground plane with an area 50mm×40mm×1.60 mm. The designed antenna generates three resonant modes at 2.12 GHz, 6.98 GHz and 13.84 GHz respectively. The bandwidths of the antenna (-10 dB) of the three frequencies are 25.75%, 6.13% and 20.63% respectively. The return loss (S ) characteristics for the 11 three bands are -41.95 dB, -22.68 dB and -23.15 dB respectively. The 3D radiation patterns of the proposed antenna are provided in the paper.
Present Situation of Renewable Energy in Bangladesh: Renewable Energy Resources Existing in Bangladesh
Journal Paper Global Journal of Researches in Engineering (GJRE-F: Electrical and Electronic Engineering), Volume 13, Issue 5, Online ISSN: 2249-4596 & Print ISSN: 0975-5861, Year: 2013
Abstract
Bangladesh is a developing country, it has probability to progress towards increasing the demand of energy .Now a day, Bangladesh is facing energy crisis. In Bangladesh, around 70% of people having lack accesses to electricity and most of them are living in the village. Among them about 40% of them are living in below poverty line. On the other hand climate change puts addition threats to development. To combat these situations, renewable energy technology stands out to be one of the prospective sources to meet its unprecedented energy demand and can contribute to achieve sustainable development as a country has a plentiful supply of renewable sources of energy. This paper investigates the prospect, trend, utilization and its technology as well as reviews the policy and institutions and opportunities of renewable energy technology towards sustainable development and climate change mitigation is context of Bangladesh.
Teaching Experiences
Teaching is the work that I love to do. It is a passion for me rather than a profession. Choosing to work as a teacher is more than just a job. You must possess an infinite amount of tolerance and compassion. For the same reasons that make it a great profession—courage and dedication—it is also a noble calling. In spite of the difficulty and weariness involved, a good teacher must have the guts to do what's necessary for the benefit of their students.
Currrent Teaching
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2022 Present
Graduate Teaching Assistant/ Instructor
I am serving as an Instructor of the course entitled "Intro to Digital Systems (ECE 2140/ ECE 3160)" at the dept of Electrical and Computer Engineering at Tennessee Technological University, TN, USA since last fall 22 semester. In the ongoing Spring 2023 semester, I am also teaching the same lab course to my students.
Course Description:
Hardware considerations and performance of combinational and sequential digital devices including gates, flip-flops, multiplexers, and decoders.
Course Objectives:
Upon completion of this course the student will be able to:
1. Effectively use digital laboratory equipment,
2. Recognize and avoid many common digital circuit problems,
3. Measure the electronic and logical characteristics of logic devices,
3. Construct, design, and test combinational and sequential logic circuits using appropriate techniques, and
5. Write technical reports
Topics to be covered:
1. Introduction to digital test equipment and laboratory reports
2. HC logic family timing: propagation delay and rise/fall times
3. HC logic family I/O: voltage and current characteristics
4. HC logic family decoupling, noise margin, and unused input pins
5. Feedback oscillation problem and LED drivers
6. Construction and testing of combinational logic circuits
7. Verification of Boolean algebra and logic minimization techniques
8. Design and testing of sequential logic
9. Practical design of combinational logic circuits
10. Logic implementation using multiplexors and decoders
11. Techniques for a combinational design project
Reference Texts:
M.M. Mano & M.D. Ciletti, Digital Design: With an Introduction to the Verilog HDL, VHDL, and SystemVerilog (6th Edition), Pearson, 2018. ISBN-13: 978-013-454989-7
Link of Course: http://jwbruce.info/teaching/ece2140/
Teaching Background
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2016 2021
Teaching Power Systems to Intern Students at APSCL
During my work at Ashuganj Power Station Company Limited, I regularly taken the internship classes and stuff training at the APSCL Power Plant Training Centre (PPTC) for man power development. I taught Transformers, Generators, Different kinds of machines, Electrical Safety, Different testing procedures like High Voltage insulation registance tests, Short ciruit tests of Transformer, Open Circuit Test of transformer, Ratio test of CT and PT, LA or surge arrester test, Testing of transformer using CPC 100, CP TD1 (Ten Delta testing kit) from Omicron, Contact resistance test of High Voltage circuit breaker, Installation of Circuit breaker in 132 kV and 230 kV substation, Earth resistance test, regular maintenance, breakdown maintenance and emergency maintenance of sub-station components etc.
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2013 2015
Teaching Web Design and Development
Actually, I love to teach to my students. While I started my start-up business, I regularly shared my knowledge and real problem solving experiences with my fellow colleagues and students. I taught how to design and develop website with the following tools and languages: HTML, CSS, JS, PHP, WordPress Theme Development and WordPress theme customization.
CONTACT INFO
I would be happy to respond if you need any information or assistance from my end. Though I have limited availability besides my daily stuffs but, in case of any queries just reach out to me through email or phone call, so that, I could response at my convenience.
- Mobile: +1-931-252-9504
- sohag@ieee.org
- ssaha42@tntech.edu
- engr.sohag.pust@gmail.com
- sk_sohag
AT SMART GRID LAB Lab
You can find me at my lab: Smart Grid Lab, Clement Hall, Room 103, Cookeville, TN-38505.
I am at my office every day from 8:00 am to 5:00 pm except Saturday, Sunday and Govt. Holiday's. It is preffered to fix an appointment to meet me at Smart-grid lab, so that I might be available besides my regular class, lab works and TA tasks/assignments. You may consider a call or email to fix an appointment to meet me.
AT THE CLASS
This option is for my students who want to meet me at the lab class of Introduction to Digital Systems, can meet me at BROWN HALL, Room 407. You may also fix an available appointment by email in case of the need of any academic assistance to understand the course contents.
I am available there at the Brown Hall (Room 407) at Tuesday (6 pm- 8.50 pm) and Friday (8 am to 1.50 pm)
AT MY HOME
I am living at 1801 Lee Avenue, Apt. B24, Cookeville, Tennessee-38501, USA.
I am available at my home at weekend (saturday, sunday and govt. holiday's) and also at the evening, but you may consider a call to fix an appointment.