Budapest University of Technology and Economics, Faculty of Electrical Engineering and Informatics

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    Electrical Equipment and Insulations

    A tantárgy neve magyarul / Name of the subject in Hungarian: Villamos berendezések és szigetelések

    Last updated: 2023. november 22.

    Budapest University of Technology and Economics
    Faculty of Electrical Engineering and Informatics

    BSc Electrical Engineering

    Sustainable Power Engineering Specialisation
    Course ID Semester Assessment Credit Tantárgyfélév
    VIVEAC11 5 2/2/0/v 5  
    3. Course coordinator and department Dr. Cselkó Richárd,
    Web page of the course https://vet.bme.hu/en/education/subjects/?training_level=&category=3
    4. Instructors Dr. Richárd Cselkó, senior lecturer, Department of Electric Power Engineering
    Dr. István Kiss, associate professor, Department of Electric Power Engineering
    Dr. Norbert Szedenik, hon. associate professor, Department of Electric Power Engineering
    5. Required knowledge Electrotechnics, Electric Power Engineering and calculation of circuits.
    6. Pre-requisites
    Ajánlott:
    Signals and systems 2, Measurement technology
    7. Objectives, learning outcomes and obtained knowledge

    The aim is to provide knowledge about the components of the electric power network, construction of the equipent, their role and requirements, and the most important physical phenomena. The calculations consist of practical cases of the above.

    8. Synopsis

    Basic requirements agains the components of the electric power network. Types of equipment, their common properties nad specifications. Reliability.

    Definition of electric arc and comparison with other discharge types. Physics of forming, sustaining and interruption of the electric arc. Properties of the arc as a network component. Dangers of arc flash.

    High-voltage circuit breakers, disconnectors and gas insulated switchgear. Properties of the sulfur-hexafluoride gas.

    Properties of medium-voltage substations. Construction of oil-blast and vacuum circuit breakers. Construction and operation of fuses.

    Typical switchgear on the low-voltage network. Definition and realization of selectivity.

    Components and insulating materials used in large power transformers. Construction of the main insulation and bushings.

    Construction of overhead power lines. Types of power line insulators. Construction of non-ceramic insulators. Construction of cables and the problems to be solved at different voltage levels.

    Environmental, electrical, mechanical and thermal stresses of insulations. Multi-level coordination of overvoltages. Calculation and optimization of electrical stress.

    Conduction and polarization in dielectrics.

    Gas discharges.

    Breakdown of liquids and solids.

    Construction of surge arresters.

    Generation and measurement of high voltage.

     

    Calculation of the switching-on of faults.

    Calculation of transient recovery voltage in various arrangements.

    Calculation of arc quenching in DC switchgear.

    Calculations of diagnostics of switchgear.

    Reliability of industrial power networks.

    Demonstration of electrical design.

    Dimensioning of high-voltage insulation.

    Statistical treatment of breakdown data.

    Dimensioning of high-voltage test equipment.

    Calculations of electrical insulation diagnostics and cable diagnostics.

    Methods to calculate the forces generated by short-circuit currents.

    Calculation of heating in case of short circuit (fuses) and slow heating. Dynamic thermal limit calculation.

    Application of FEM to solve high-voltage problems.

     

    9. Method of instruction

    Lectures aided with computer presentations.

    Practices containing case studies, simaultions and calculations.

    10. Assessment

    Education period: one mindterm (at least with satisfactory result).

    Exam period: Oral exam, with written pre-exam. Final grade weighing: midterm 10%, exam 90%.

    11. Recaps One retake possibility of the midterm during the semester.
    12. Consultations Base on request.
    13. References, textbooks and resources Presentation uploaded to the Moodle system.
    E. Kuffel, W.S. Zaengl, J. Kuffel: High Voltage Engineering - Fundamentals, Second edition 2000, Butterworth-Heinemann
    Ruben D. Garzo: High Voltage Circuit Breakers, 2002, Marcel Dekker Inc.
    IEEE Std 493TM-2007 IEEE Recommended Practice for the Design of Reliable Industrial and Commercial Power Systems
    14. Required learning hours and assignment
    Lectures56
    Preparation for lectures
    		 30
    Preparation for midterm
    		 20
    Self-learning materials
    		 14
    Preparation for exam
    		 30
    Altogether 150
    15. Syllabus prepared by Dr. Richard Cselko, senior lecturer, Department of Electric Power Engineering
    IMSc program

    1) Extra tasks, e.g. summary of scientific papers etc.

       a) This task does not count in the final grade.

    2) One extra task in the midterm and in the exam.

    IMSc score

    - Maximum 25 IMSc points can be gained.

    - IMSc points can be gaind only if the final grade is excellent.

    - IMSc points can be gainded even for students who are not member of the program.

     

    - Extra task: max. 15 IMSc points

    - Extra task in the midterm and exam: 5-5 IMSc points