All Stories

  1. Productivity Modeling and Analysis of Mono- and Bifacial PV Panels Under Different Weather Conditions and Reflection Surfaces for Application in the Agriculture Sector

    Article • AgriEngineering, September 2025, MDPI AG

    Prof. Zahari ZARKOV

  2. Modeling of Photovoltaic Systems for Self-Consumption

    Article • September 2023, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  3. Application of Hybrid Inverters in Photovoltaic Systems

    Article • June 2023, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  4. Feasibility Study of a Hybrid Excited Claw-Pole Alternator

    Article • June 2023, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  5. DC-DC Converter for Adaptation of Thin-Film PV Panel I-V Characteristics for Microinverter

    Article • November 2022, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  6. PV System for Electricity Production for Self-Consumption

    Article • September 2022, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  7. Study of PV Technology Influence on the Battery Sizing in PV-based Irrigation System

    Article • June 2022, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  8. Modeling and research of photovoltaic system with microinverter

    Article • September 2021, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  9. Analysis of the Influence of NdFeB Permanent Magnet’s Type and Volume on the Characteristics of a PM Claw-pole Alternator

    Article • July 2021, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  10. Influence of Magnet Dimensions on Torque Components and Cost of Synchronous Machine with Interior Magnets

    Article • July 2021, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  11. Water Pumping Hybrid Energy Production System for Irrigation Purposes

    Article • Energies, May 2021, MDPI AG

    Prof. Zahari ZARKOV

  12. Indoor testing of solar panels

    Article • September 2020, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  13. Design Opportunities and Building Integration of PV systems

    Article • January 2020, Springer Science + Business Media

    Prof. Zahari ZARKOV

  14. Application of ANN for solar radiation forecasting - case study of Oryahovo

    Article • September 2019, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  15. Emulator of PV Panels for Laboratory Studies

    Article • September 2019, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  16. Grid connected PV systems with single-phase inverter

    Article • September 2019, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  17. The Comparison of different approaches for solar radiation forecasting using Artificial Neural Network

    Article • September 2019, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  18. An Approach for Modeling the Electronic Converter-Motor System for Electric Vehicles

    Article • June 2019, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  19. Determination of the Synchronous Inductances of a Claw Pole Alternator

    Article • June 2019, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  20. Influence of Skin Effect on Stator Windings Resistance of AC Machines for Electric Drives

    Article • June 2019, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  21. Modeling of Electrical Characteristics of Various PV Panels

    Article • June 2019, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  22. Study of Physical Model of WECS with Synchronous Generator and Back-to-back Converter

    Article • June 2019, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  23. Application of dSPACE Platform in the Study of Electric Generators with RES

    Article • June 2018, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  24. Hybrid System Sizing using per unit Approach - Application to Bulgaria, France and Romania

    Article • June 2018, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  25. Methods for Energy Production Estimation from Photovoltaic Plants: Review and Application

    Article • June 2018, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  26. Study of Two MPPT Methods for High Inertia Wind Turbine with Direct Driven PMSG

    Article • June 2018, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  27. Theoretical and Experimental Study of Interleaved Non-Inverting Buck-Boost Converter for RES

    Article • June 2018, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  28. Modelling PV panels: Case study of Oryahovo, Bulgaria

    Article • June 2017, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  29. Power control of PMSG for wind turbine using maximum torque per ampere strategy

    Article • June 2017, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  30. Small wind generator system with non-inverting buck-boost converter and battery storage

    Article • June 2017, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  31. Modeling of PV generators from different technologies — case study

    Article • September 2016, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  32. A study of parallel structures of DC-DC converters for application in wind energy conversion systems

    Article • September 2016, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  33. Photovoltaic Systems’ Performances with Different Module Types

    Article • Materials Science Forum, May 2016, Trans Tech Publications

    Prof. Zahari ZARKOV, Vladimir Lazarov

  34. PV Modules Productivity for Building Integration

    Article • Materials Science Forum, May 2016, Trans Tech Publications

    Prof. Zahari ZARKOV, Vladimir Lazarov

  35. Wind turbine with doubly fed induction generator operating at limited power point

    Article • September 2012, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  36. New control strategy for variable speed wind turbine with DC-DC converters

    Article • September 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  37. Study of control strategies for variable speed wind turbine under limited power conditions

    Article • September 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV

  38. Analysis of DC converters for wind generators

    Article • Facta universitatis - series Electronics and Energetics, January 2009, National Library of Serbia

    Prof. Zahari ZARKOV

  39. Optimization of Hybrid Systems with Renewable Energy Sources : Trends for Research

    Article • July 2006, Institute of Electrical & Electronics Engineers (IEEE)

    Prof. Zahari ZARKOV