American Journal of Electrical Power and Energy Systems

Archive

Volume 4, Issue 6, December 2015

  • Analysis and Investigation of Direct AC-AC Quasi – Resonant Converter

    Mihail Hristov Antchev

    Issue: Volume 4, Issue 6-1, December 2015
    Pages: 1-7
    Received: 28 July 2015
    Accepted: 29 July 2015
    Published: 29 September 2015
    DOI: 10.11648/j.epes.s.2015040601.11
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    This article belongs to the Special Issue Improvement of Energy Efficiency in the Conversion of Electrical Energy by Means of Electronic Converters
    Abstract: The present article reports an analysis and investigation of direct AC-AC quasi-resonant converter. A bidirectional power device, whose switching frequency is lower than the frequency of the current passing through the load, is used for its realisation. A mathematical analysis of the processes has been made and comparative results from computer sim... Show More
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  • Comparative Analysis of Hysteresis and Fuzzy-Logic Hysteresis Current Control of a Single-Phase Grid-Connected Inverter

    Mihail Antchev, Angelina Tomova-Mitovska

    Issue: Volume 4, Issue 6-1, December 2015
    Pages: 8-12
    Received: 5 August 2015
    Accepted: 6 August 2015
    Published: 29 September 2015
    DOI: 10.11648/j.epes.s.2015040601.12
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    This article belongs to the Special Issue Improvement of Energy Efficiency in the Conversion of Electrical Energy by Means of Electronic Converters
    Abstract: This paper presents a comparative analysis of two current control methods of single phase on-grid inverter- the hysteresis current control and the fuzzy logic hysteresis current control method. The aim of the paper is to compare the values of the main researched parameters of the on-grid inverter and to show which control method is more energy effi... Show More
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  • Energy Saving Lamps as Sources of Harmonic Currents

    Zahari Ivanov, Hristo Antchev

    Issue: Volume 4, Issue 6-1, December 2015
    Pages: 13-18
    Received: 11 September 2015
    Accepted: 11 September 2015
    Published: 29 September 2015
    DOI: 10.11648/j.epes.s.2015040601.13
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    This article belongs to the Special Issue Improvement of Energy Efficiency in the Conversion of Electrical Energy by Means of Electronic Converters
    Abstract: This paper presents the results from the research of the indexes in regard to the power supply network, when a change is applied to the power supply tension of the Compact Fluorescent Lamps and LED Lamps with power up to 30W of different manufacturers. Comparision data is presented for the power factor, the displacement factor and the total harmoni... Show More
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  • Design and Investigation of High Voltage Isolated Silicon-Controlled Rectifier (SCR) Gate Driver

    Kostadin Milanov, Mintcho Mintchev, Hristo Antchev

    Issue: Volume 4, Issue 6-1, December 2015
    Pages: 19-22
    Received: 15 September 2015
    Accepted: 16 September 2015
    Published: 29 September 2015
    DOI: 10.11648/j.epes.s.2015040601.14
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    This article belongs to the Special Issue Improvement of Energy Efficiency in the Conversion of Electrical Energy by Means of Electronic Converters
    Abstract: The present article examines the design and implementation specifics of High Voltage Isolated Driver for control of serially connected SCR. The driver features the use of current transformers for the impulses applied to the control electrodes of simple-connected primary coils, as well as control pulses transmission through optical fibre. Results fr... Show More
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