Tsveti Hranov

@tu-sofia.bg

Assistant Professor at Power Electronics Department, Faculty of Electronic Engineering and Technologies
Technical University of Sofia

Tsveti Hranov


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https://researchid.co/chranov

EDUCATION

03/2018 – 08/2018: Exchange PhD in the University of Applied Sciences Offenburg
07/2015 – 12/2018: PhD at the department of Power Electronics, TU-Sofia, Profile „Electronic Energy Converters“, Thesis „Design of Resonant DC/DC converters with guaranteed parameters“
10/2013 – 02/2015: M.Eng. Electronics at the Technical University of Sofia
10/2009 – 07/2013: B.Sc. Engineering physics at the Sofia University

RESEARCH, TEACHING, or OTHER INTERESTS

Electrical and Electronic Engineering, Renewable Energy, Sustainability and the Environment, Control and Systems Engineering, Modeling and Simulation
46

Scopus Publications

Scopus Publications

  • Virtual Instrument-Based Expert System for Environmental Optimization
    Tsveti H. Hranov, Nikolay L. Hinov
    60th International Scientific Conference on Information Communication and Energy Systems and Technologies Icest 2025 Proceedings, 2025
    Environmental optimization is a critical aspect of modern resource management, requiring intelligent decision-making systems that can adapt to dynamic conditions. This paper presents a Virtual Instrument-Based Expert System designed to optimize environmental parameters such as energy consumption, water utilization, and climate control. By integrating virtual instruments within an expert system framework, the proposed approach enables real-time data acquisition, analysis, and adaptive decision-making. The system leverages rule-based logic to adjust environmental factors dynamically, ensuring efficient resource utilization while maintaining optimal conditions. A case study implementation in LabVIEW demonstrates the system's ability to monitor and regulate key environmental variables without the need for external hardware. The results highlight the feasibility and effectiveness of virtual instrument-driven expert systems in environmental management, offering a scalable and cost-effective solution for industrial and smart infrastructure applications.
  • Educational LabVIEW PWM Generator for Switching Power Converter Applications
    Tsveti H. Hranov, Nikolay L. Hinov
    60th International Scientific Conference on Information Communication and Energy Systems and Technologies Icest 2025 Proceedings, 2025
    This paper presents the development of an educational Pulse Width Modulation (PWM) generator using the LabVIEW graphical programming environment, aimed at facilitating the study and experimentation of DC/DC and DC/AC converter applications. The proposed system provides a user-friendly interface for real-time control and visualization of PWM signals, allowing students and researchers to adjust key parameters such as frequency, duty cycle, and signal shape. The solution is designed to interface with standard microcontroller-based driver circuits, enabling practical implementation and testing of various power converter topologies, including buck, boost, buck-boost DC/DC converters, hard-switching and soft-switching inverters. The educational tool enhances the learning process by bridging theoretical concepts with hands-on experimentation, making it particularly suitable for laboratory use in power electronics and electrical engineering courses.
  • Practical evaluation of intelligent DC-DC fast charger with embedded system applications
    Tsveti H. Hranov, Nikolay L. Hinov
    2024 33rd International Scientific Conference Electronics Et 2024 Proceedings, 2024
    The paper presents the evaluation of an intelligent DC-DC USB fast charger, based on the integrated solution bq25895 from Texas Instruments. The idea is to evaluate the boost mode efficiency from a single cell Li-ION battery and compare it to the stated datasheet parameters. The solution differs from the evaluation board offered by the firm, in sense that the PCB is designed to be as compact as possible for space constrained application. In this sense there will be different thermal performance of the chip, hence this could be a reason for difference in the practical and laboratory evaluation of the solution.
  • DC-DC Converter for Energy Storage System with Different Inductor Implementations
    Tsveti Hranov, Dimitar Arnaudov, Hristiyan Kanchev
    2024 23rd International Symposium on Electrical Apparatus and Technologies Siela 2024 Proceedings, 2024
    This paper presents an evaluation of the operating modes of a DC/DC buck converter with various inductor configurations. Since real-world DC and AC losses can be limited by using various designs or configurations of switching inductors, a study is carried out to determine the losses and the influence on other parameters such the volume and mass constraints, cost and ease of implementation in order to obtain optimal design and parameters of the converter.
  • Intelligent System for Conducting Experiments with DC/DC Converters
    Anton A. Dekov, Nikolay L. Hinov, Tsveti H. Hranov
    2024 33rd International Scientific Conference Electronics Et 2024 Proceedings, 2024
    The paper presents an automated system with application in power electronics for $D C / D C$ converter efficiency measurements. The structure and the main functions of the virtual instrument are presented along with sample test measurements. Main features include the plotting in real time of the obtained results, ability to react in critical situations via the GUI using safety features buttons, faster and flexible measurements set-up and multi-platform capability, due to the fact that open-source software is used.
  • Software Environment for Automated Experiments with DC/DC Converters
    Anton A. Dekov, Nikolay L. Hinov, Tsveti H. Hranov
    2024 12th International Scientific Conference on Computer Science Comsci 2024 Proceedings, 2024
    The paper details the architecture of an automated measurement system application developed in Python. It leverages packages such as PyVISA, Pandas, and PyQt6 for its graphical user interface. The application is utilized in power electronics to measure the efficiency of DC/DC converters. The structure and key functions of the virtual instrument's code are presented and analyzed. Notable features include real-time plotting of results, safety feature buttons in the GUI for critical situations, a faster and more flexible measurement setup, and multi-platform compatibility, thanks to the use of open-source software.
  • The Tesla Coil as an Educational Tool: Unveiling High-Voltage Phenomena in Power Electronics Education
    Alex P. Mitov, Nikolay L. Hinov, Tsveti H. Hranov
    2024 12th International Scientific Conference on Computer Science Comsci 2024 Proceedings, 2024
    This paper explores the Tesla Tower, also known as the Tesla coil, an electrical resonant transformer circuit developed by Nikola Tesla in the late 19th century. Designed to produce high-voltage, low-current electricity, the Tesla coil is capable of generating impressive electrical discharges that resemble lightning. The system operates on principles of electromagnetic induction, using a primary and secondary coil to amplify voltage without physical connections. Applications of the Tesla coil span from educational demonstrations and scientific experiments to unique uses in music, entertainment, and plasma technologies. This work highlights the Tesla coil's enduring relevance in scientific and artistic fields, as well as its contributions to understanding high-voltage electrical phenomena.
  • Various Peculiarities of Automated Test and Measurements in Power Electronics
    Tsveti Hranov, Anton Dekov, Vladimir Dimitrov, Nikolay Hinov
    International Conference on Electrical Computer Communications and Mechatronics Engineering Iceccme 2024, 2024
    The paper presents aspects for adoption of the automated test and measurement workflow and algorithms related to the study of power electronic converters. Particularly this is related with some peculiarities of various test bench configurations and how this test-bench configurations affect the speed, performance and accuracy of the carried measurements and produced data. First a test without a device is performed to evaluate the measurement instruments and after that the effect of it has been investigated. Then evaluation of the system is done with a converter in the loop, to investigate its' effect on the transient processes. The test is based on a virtual instrument (VI), written in Python programming language with various instrument control and data acquisition and processing libraries. The main idea of this VI is to preform efficiency tests of power converters. It is of critical aspect that the researcher is aware of this peculiarities in order to make accurate conclusions on power converter parameters such as efficiency, load and line regulation, reliability and safety of the devices tested.
  • Open Source Robotics Platform for Educational Purposes
    Tsveti Hristov Hranov, Nikolay Lyuboslavov Hinov
    2023 11th International Scientific Conference on Computer Science Comsci 2023 Proceedings, 2023
    The paper presents a development of a platform for open-source robotics with the aim to introduce the topic to wider audience in a simpler and application-oriented manner. The platform consists of hardware designs, based on popular community projects, application software designed with modularity in mind. The design isn’t tied specifically to any type of robot, rather it is encouraged to be ported on different robot types and to introduce the concept long used in the personal computers – the user is presented with the hardware to assemble the configuration and install software necessary for the chosen application. What separates this approach from the already developed solutions is the emphasis on simplicity and robustness, using a number of techniques, such as minimum dependencies, maximum usage of the chosen software libraries and simplified hardware design. Nonetheless expandability to a full blown system with computer vision, artificial intelligence and internet-of-things is still possible, due to the simplicity and modularity.
  • LabView Based Function Generator for Power Electronics Training Needs
    Nikolay L. Hinov, Tsveti H. Hranov
    2023 58th International Scientific Conference on Information Communication and Energy Systems and Technologies Icest 2023 Proceedings, 2023
    The manuscript presents the synthesis and program implementation of a functional generator for conducting simulation studies in the field of power electronics. The individual generator blocks are presented, along with their block diagrams and their specific implementation in the LabView visual programming environment. The functionality of the device is demonstrated using separate examples of the synthesis of common signals to control power electronic devices, such as pulse width modulation (PWM) simulations. The presented approach is very useful for power electronics training needs, as it enables a variety of experiments to be performed with both models and real devices, thanks to the specialized hardware developed by National Instruments.
  • Tolerance Analysis of a Resonant DC/AC Converter with Reverse Diodes Operating at Control Frequency Below and Above Resonance
    Nikolay L. Hinov, Tsveti H. Hranov
    2023 32nd International Scientific Conference Electronics Et 2023 Proceedings, 2023
  • Validation of Buck DC/DC converter inductor influence via experimental evaluation module
    Kiril I. Maslyaniy, Tsveti H. Hranov, Nikolay L. Hinov
    2023 32nd International Scientific Conference Electronics Et 2023 Proceedings, 2023
  • Practical Buck DC/DC Converter Theoretical and Experimental Evaluation
    Tsveti H. Hranov, Nikolay L. Hinov, Adriana L. Lilova
    2023 58th International Scientific Conference on Information Communication and Energy Systems and Technologies Icest 2023 Proceedings, 2023
  • Educational Model-Based Evaluation of Buck DC/DC Converter Controllers
    Tsveti H. Hranov, Nikolay L. Hinov
    2022 57th International Scientific Conference on Information Communication and Energy Systems and Technologies Icest 2022, 2022
  • Tolerance Analysis of SEPIC DC-DC Converter
    Nikolay Hinov, Tsveti Hranov, Bogdan Gilev
    2022 8th International Conference on Energy Efficiency and Agricultural Engineering EE and Ae 2022 Proceedings, 2022
  • Comparative Analysis of Boost DC-DC Converters with Application in Power Electronics Education
    Tsveti Hranov, Nikolay Hinov, Adriana Lilova
    2022 31st International Scientific Conference Electronics Et 2022 Proceedings, 2022
  • Modelling of an Electronic Technological System for Induction Melting of Metals
    Nikolay Hinov, Tsveti Hranov, Bogdan Gilev
    2022 22nd International Symposium on Electrical Apparatus and Technologies Siela 2022 Proceedings, 2022
  • Model-based Optimization of SEPIC DC-DC Converter
    Nikolay HINOV, Tsveti HRANOV, Bogdan GILEV
    2022 22nd International Symposium on Electrical Apparatus and Technologies Siela 2022 Proceedings, 2022
  • Investigation of a Contactless Power Transmission System Based on a Resonant Inverter
    Tsveti Hranov, Nikolay Hinov, Kiril Maslyaniy
    2022 31st International Scientific Conference Electronics Et 2022 Proceedings, 2022
  • Remote Tracking System for ECG Signal with Textile Electrodes
    Elena Nikolova, Vladimir Dimitrov, Tsveti Hranov, Elitsa Gieva
    Proceedings of the International Spring Seminar on Electronics Technology, 2022
  • Automated LabVIEW measurement LLC system control GUI
    Nikolay Hinov, Tsveti Hranov
    2021 17th Conference on Electrical Machines Drives and Power Systems Elma 2021 Proceedings, 2021
  • Practical Approach for Improving the Dynamics of the Resonant DC-DC Converter
    Nikolay L. Hinov, Tsveti H. Hranov
    Proceedings of the 2021 25th International Conference Electronics Electronics 2021, 2021
  • Tolerance Analysis of Common Transistor DC-DC Converters
    Nikolay L. Hinov, Tsveti H. Hranov
    Proceedings of the 2021 25th International Conference Electronics Electronics 2021, 2021
  • Comparison of Boost Converter Topologies for Charging Single Cell Li-ION
    Tsveti Hranov, Nikolay Hinov, Adriana Lilova
    International Conference on High Technology for Sustainable Development Hitech 2021 Proceedings, 2021
  • Automated Test Measurements in Teaching of Power Supply Devices
    Nikolay Hinov, Tsveti Hranov
    2020 7th International Conference on Energy Efficiency and Agricultural Engineering EE and Ae 2020 Proceedings, 2020
  • Tolerance Analysis of Resonant Converters with Parallel Loaded Capacitor
    Nikolay Hinov, Tsveti Hranov, Vladimir Dimitrov
    2020 29th International Scientific Conference Electronics Et 2020 Proceedings, 2020
  • Digitization of control systems for power electronic converters
    Nikolay L. Hinov, Vladimir V. Dimitrov, Tsveti H. Hranov
    2020 29th International Scientific Conference Electronics Et 2020 Proceedings, 2020
  • Model-based optimisation of a buck-boost DC-DC converter
    Nikolay Hinov, Tsveti Hranov
    2020 21st International Symposium on Electrical Apparatus and Technologies Siela 2020 Proceedings, 2020
  • Comparsion of different methods for controlling DC-DC converters in constant current mode
    Nikolay HINOV, Tsveti HRANOV, Bogdan GILEV
    2020 21st International Symposium on Electrical Apparatus and Technologies Siela 2020 Proceedings, 2020
  • Model-based optimization of a buck DC-DC converter
    Nikolay Hinov, Tsveti Hranov
    Aip Conference Proceedings, 2019
  • Model-based Optimization of a Boost DC-DC Converter
    Nikolay Hinov, Bogdan Gilev, Tsveti Hranov
    2019 International Conference on High Technology for Sustainable Development Hitech 2019, 2019
  • LabVIEW Based Control System for PWM DC-DC Converters
    Nikolay Lyuboslavov Hinov, Tsveti Hristov Hranov
    2019 28th International Scientific Conference Electronics Et 2019 Proceedings, 2019
  • Model-based optimization of an llc-resonant dc-dc converter
    Nikolay Hinov, Bogdan Gilev, Tsveti Hranov
    Electronics Switzerland, 2019
  • Evaluation and Verification of Series Resonant Converter with Transformer Operating Regimes
    Nikolay Hinov, Tsveti Hranov
    International Conference on High Technology for Sustainable Development Hitech 2018 Proceedings, 2018
  • Evaluation and verification of LLC operating regimes
    Nikolay Hinov, Tsveti Hranov
    2018 20th International Symposium on Electrical Apparatus and Technologies Siela 2018 Proceedings, 2018
  • Smart training environment for power electronics
    Nikolay Hinov, Tsveti Hranov
    Aip Conference Proceedings, 2017
  • Modeling of magnetic components for power electronic converters
    Tsveti Hranov, Nikolay Hinov
    Aip Conference Proceedings, 2017
  • Using mathematical software to design power electronic converters
    Nikolay Hinov, Tsveti Hranov
    Aip Conference Proceedings, 2017
  • Modeling of electronic energy converter for induction heating using LabVIEW
    Tsveti Hristov Hranov, Nikolay Lyuboslavov Hinov
    2017 26th International Scientific Conference Electronics Et 2017 Proceedings, 2017
  • Development of series resonant converter models with output transformer
    Nikolay Hinov, Tsveti Hranov
    2017 26th International Scientific Conference Electronics Et 2017 Proceedings, 2017
  • Modelling parallel-loaded resonant converter
    Nikolay Hinov, Tzvety Hranov
    Proceedings of the International Spring Seminar on Electronics Technology, 2017
  • Modeling DC-DC converter for charging supercapacitors
    Tzvety Hranov, Gergana Vacheva, Nikolay Hinov, Dimitar Arnaudov
    Proceedings of the International Spring Seminar on Electronics Technology, 2017
  • Modeling of synchronous DC-DC converter with guaranteed parameters
    Dimitar Arnaudov, Nikolay Hinov, Hristiyan Kanchev, Tzvety Hranov
    Proceedings of the International Spring Seminar on Electronics Technology, 2017
  • Development of LabVIEW Models for resonant power converters
    Pcim Europe 2017 International Exhibition and Conference for Power Electronics Intelligent Motion Renewable Energy and Energy Management, 2017
  • Control design procedure for prototyping resonant converters with reverse diodes
    Nikolay Hinov, Tsveti Hranov
    2016 25th International Scientific Conference Electronics Et 2016, 2016
  • Current fed inverter application as a controllable DC load
    Hristiyan Chavdarov Kanchev, Nikolay Lyuboslavov Hinov, Dimitar Damyanov Arnaudov, Tsvety Hristov Hranov
    2016 25th International Scientific Conference Electronics Et 2016, 2016