
Timeline
About me
Assistant Research Engineer at COENSYS Co., Ltd.
Education
Mfantsipim school
2010 - 2013General scienceChungnam national university
2020 - 2022Master of science - msc electrical engineeringUniversity of energy and natural resources
2013 - 2017Bachelor of science - bsc electrical and electronic engineeringDaegu university
2019 - 2020Korean language programme korean language
Experience
Ghana grid company limited
Jul 2016 - Jul 2016Internship trainee• Assisted in the inspection of switchyards/substations.• Conducted Tower Footing Resistance test on transmission towers using the earth resistance tester.• Acquired knowledge on Protection and Control using relays and protective devices.• Performed electrical maintenance activities and laying of electrical cables.
University of energy and natural resources
Sept 2017 - Aug 2018Teaching assistant• Conducted discussion sections, tutorials, and projects.• Evaluated and graded assignments, quizzes, examinations, and recorded grades.• Developed teaching materials such as supplementary notes and answer keys.• Motivated students in a creative direction towards problem-solving.• Assisted in teaching the following courses: Classical and Digital Control Systems, Electrical Circuits, Electrical Machines (Transformers), and Special Electrical Machines.Research projects performed/ students’ work reviewed:• Closed transition star-delta starter of an induction motor using timers.• Microcontroller-Based Fault Detection and Location System for Transmission lines.• A self-regulating level control mechanism for submersible fluid pumps using PLC. Show less
Power distribution services ghana ltd
Sept 2018 - Jul 2019Internship trainee (metering and technical services section)• Engaged in the automatic meter reading (AMR) standardization project.• Intervened in monitoring and rectifying faults on 3-phase Special Load Tariff (SLT) meters.• Performed installation and replacement of meters, and switching of power supply.• Assisted in the programming of meters for setup before installation.
Chungnam national university
Sept 2020 - Aug 2022Graduate research assistantEnergy Storage Conversion Lab. (ESCL), Department of Electrical Engineering• Developed a battery energy storage system (BESS) control model to improve power quality and reduce peak loads, considering BESS state-of-charge (SoC) and time-of-day (ToD) operation of customers’ load.• Co-developed an optimal sizing approach for lithium-ion battery systems, incorporating the battery’s nonlinearity features via Peukert's law and analyzing load conditions employing EVs and PV generators.• Implemented the flower pollination algorithm (FPA) to optimize maximum power output in PV systems, considering complex partial shading conditions, real-world field irradiance data, and complex PV configurations.• Proposed an improved elastic net (IEN) regularization with an adaptive elastic net penalty to estimate the distribution of relaxation times (DRT) to interpret and analyze lithium-ion battery electrochemical impedance spectroscopy (EIS) data of different SoCs and temperatures.• Co-introduced a novel method for achieving an enhanced battery SoC estimate through denoising the discharge-charge voltage noisy signal resulting from unexpected noise sensing in the BMS. Show less
Coensys co., ltd.
Nov 2022 - nowAssistant research software engineerCOENSYS Co., Ltd. is a battery pack manufacturer with advanced BMS technology and battery module & pack design and production know-how.• Develop battery management system (BMS) algorithms: SoC estimation, heating/thermal management control,battery cell balancing, charging/discharging cycle operation control techniques.• Analyze experimental data from battery testing and field performance to identify patterns, trends, and areas forimprovement.• Develop software solutions to optimize battery usage, charging, and discharging processes for efficiency andlongevity.• Collaborate with hardware engineers to integrate various software components with battery managementhardware.• Diagnose and resolve software-related issues in battery systems and provide timely solutions to ensure reliableand continuous operation.Projects performed/ongoing• 150Ah, 12.8V Lithium iron phosphate battery (LFP) battery pack system developed for an electric snowplow.• 45Ah, 345.6V LFP battery pack system developed for an autonoumous driving vehicle; BMS (MBMS/SBMS)-EVCC-EVSE DC fast charging (CCS1).• Power distribution unit (PDU) developed for a 1-ton EV road sweeper, 40kW/80kW Hyundai hydrogen-powered tractor EV, and KIA tractor EV. Show less
Licenses & Certifications
- View certificate
Python data structures
CourseraOct 2021 - View certificate
Introduction to battery-management systems
CourseraOct 2021 - View certificate
Awareness of safety
Korea research institute of bioscience and biotechnology (kribb)Jul 2021 Current transformer saturation and sizing|webinar
Etap - operation technology, inc.Jul 2021- View certificate
Research lab accidents i
Korea research institute of bioscience and biotechnology (kribb)Jul 2021 - View certificate
Programming for everybody (getting started with python)
CourseraAug 2021 - View certificate
Safety management practice i
Korea research institute of bioscience and biotechnology (kribb)Jul 2021 - View certificate
Renewable power generation and energy storage systems
Ieee pes peruMar 2021
Honors & Awards
- Awarded to Roland Kobla TagayiSolar Power Paper Award Korea Institute of Power Electronics Society Jul 2021 Paper title: Flower pollination based MPPT algorithm for partial shaded solar PV system
- Awarded to Roland Kobla Tagayi2019 Global Korea Scholarship Program Scholar National Institute for International Education, Korean Ministry of Education Sep 2019
- Awarded to Roland Kobla TagayiCertificate of Honor for being the Overall Best Graduating Student 2016/17 Academic Year. University of Energy and Natural Resources, Sunyani
- Awarded to Roland Kobla TagayiCitation of Honor as the Valedictorian for 2016/2017 Graduating Class University of Energy and Natural Resources Alumni Association
Languages
- enEnglish
- ewEwe
- koKorean
- frFrench
- twTwi
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