ELECTRICAL ENGINEERING

SOLAR RADIATION ATLAS IN NORTHERN PART OF THE REPUBLIC OF SRPSKA
Ivana S. Radonjić1, Tomislav M. Pavlović1, Dragoljub Lj. Mirjanić2, Galina I. Sazhko3
1 University of Niš, Faculty of Sciences and Mathematics, Department of Physics, Višegradska 33, 18000 Niš, Serbia
2 Academy of Sciences and Arts of the Republic of Srpska, Bana Lazarevića 1, 78000 Banja Luka, Republic of Srpska
3 Ukrainian engineering pedagogics academy, Kharkov, Ukraine


POWER SWITCHES STRESS ON A RESONANT CONVERTER AT A VARIABLE FREQUENCY CONTROL
Angel Lichev
University of Food Technologies – Plovdiv, Bulgaria


LED LIGHTING TECHNOLOGIES FOR DISINFECTION OF THE HUMAN ENVIRONMENT
Pylyp Hovorov1, Anastasiia Kindinova1, Iryna Ivankova1, Kateryna Hovorova1
1 O.M. Beketov National University of Urban Economy in Kharkiv


ANN APPROACH FOR MAGNETIC GEAR DESIGN OPTIMIZATION
Miglenna Todorova1, Iliana Marinova1, Valentin Mateev1
1 Technical University of Sofia, Department of Electrical Apparatus, Sofia 1156, Bulgaria
MACHINE LEARNING APPROACH FOR ELECTRIC ARC DISCHARGE PARAMETERS ESTIMATION
Valentin Mateev1, Martin Ralchev1, Iliana Marinova1
1 Technical University of Sofia, Department of Electrical Apparatus, Sofia 1156, Bulgaria


RESEARCH BREAK TIME OF RESIDUAL CURRENT DEVICE
Tsvyatko Kolev Varbov
Technical University of Gabrovo, Bulgaria


COMPARISON OF SOME PARAMETERS OF ELECTROMAGNETIC COMPATIBILITY OF DIMERS
Tsvyatko Kolev Varbov, Krasimir Marinov Ivanov
Technical University of Gabrovo, Bulgaria


MEASUREMENTS OF THE PARAMETERS OF PARTIAL DISCHARGES OF MEDIUM VOLTAGE MOTORS
Panayot Ivanov Yankov, Krasimir Marinov Ivanov
Technical University of Gabrovo, Bulgaria


INDUCED VOLTAGES FROM ELECTRIC LINES OF RAILWAY TRANSPORT
Krasimir Marinov Ivanov, Petar Kolev Petrov, Tsvyatko Kolev Varbov, Georgi Conev Velev
Technical University of Gabrovo, Bulgaria

INVESTIGATION THE EFFECTS OF COMPENSATION OF REACTIVE LOADS IN NONLINEAR REGIMES ON THE RELIABILITY OF ELECTRICITY
Iliev I.H.1, Panchev H.I.2, Todorov V.V.3
1 University of Mining and Geology, Department of Electric Power Supply and Electrical Equipment
2 Technical University of Varna, Department of Electric Power Supply and Electrical Equipment
3 University of Mining and Geology, Department of Electric Power Supply and Electrical Equipment


RELIABILITY STUDY OF MEDIUM VOLTAGE GRIDS IN CASE OF POOR POWER QUALITY
Iliev I.H.1, Panchev H.I.2, Todorov V.V.3
1 Sofia University of Mining and Geology, Department of Electrification of Mining Production,
2 Technical University of Varna, Department of Electric Power Supply and Electrical Equipment,
3 Sofia University of Mining and Geology, Department of Electrification of Mining Production


АPPLICATION OF METHODOLOGY FOR CURRENT SIGNATURE ANALYSIS FOR DIAGNOSIS OF SHIP POWER PLANTS
Yulian Yordanov, Milen Duganov, Plamen Parushev, Valentin Gyurov
Technical University of Varna, Bulgaria


PRACTICAL APPROACH FOR DETERMINATION OF POWER TRANSFORMERS PARAMETERS IN SIMULATIONS MODELS OF SHIPBOARD ELECTRICAL SYSTEMS
Milen Duganov, Plamen Parushev, Valentin Gyurov
Technical University of Varna, Department of Electric Power Supply and Equipment


RESEARCH AND ANALYSIS OF INDUCED VOLTAGES FROM URBAN ELECTRIC TRANSPORT 
P. K. Petrov, Kr. M. Ivanov, G. Ts. Velev, Ts. K. Varbov
Technical University of Gabrovo, Bulgaria


MATHEMATICAL MODELS FOR DETERMINING THE CONSUMED AND GENERATED REACTIVE POWER FROM ELEMENTS OF THE POWER SUPPLY SYSTEMS OF INDUSTRIAL SITES
E. R. Kartselin1, G. Ts. Velev2, N. S. Minekov3, Ts. K. Varbov2, R. A. Alexandrov1
1 University of Mining and Geology “St. Ivan Rilski” – Sofia, Bulgaria
2 Technical University of Gabrovo, Bulgaria
3 Assarel-Medet JSC, Bulgaria