Bojan Erceg

University of Banja Luka · Department of Electric Power Engineering

The paper proposes a novel planning approach for optimal sizing of standalone photovoltaic-wind-diesel-battery power supply for mobile telephony base stations. The approach is based on integration of a comprehensive probabilistic sequential Monte Carlo simulator and a black-box optimizer using DIRECT (DIviding RECTangles) method. The main property...

Noninvasive contactless methods for electric power line monitoring based on magnetic field measurement have become an interesting topic for researchers and the electric power industry since introduction of the Smart Grid concept. By measuring and analyzing magnetic field originating from currents in power line conductors it is possible to detect fa...

For development and testing of Fault Passage Indicators (FPIs) a laboratory model of a three-phase overhead line has to be constructed. For reasons of current source intensity and space limitations in laboratory conditions, the phase currents and support pole dimensions should be properly scaled in order to achieve same values of magnetic flux dens...

One of the effective strategies for increasing reliability of the distribution networks is to perform a faster fault localization. The common techniques for accelerating the process of finding the faults are based on application of fault locators and fault passage indicators. The goal of this study is to assess the performance of both techniques, e...

This paper discusses the problem of powering a remote rural mobile base station using a standalone hybrid renewable energy system. A wind turbine and photovoltaic system are employed as the complementary power generation technologies, while the diesel generator serves as a backup power supply. A battery is required to reduce the impact of intermitt...

Standalone hybrid systems based on renewable energy sources may represent a convenient and cost effective option for powering isolated consumers located far from the existing grid. In this study the focus is on particular photovoltaic-wind-diesel-battery systems which supply mobile telephony base stations. In the study, both the consumption of tele...

In contemporary electrical power systems real-time power line monitoring and supervision are commonly performed using simple non-invasive devices with contactless magnetic field measurement. Measured magnetic fields are commonly employed for fault detection in fault passage indicators, but they can also be used to determine electrical and non-elect...

This paper presents a laboratory setup for testing and experimental verification of fault detection methods based on contactless measurement of power line magnetic field. The setup consists of a physical power line model scaled to laboratory conditions with two orthogonal measuring coils installed on one support pole underneath phase conductors. Vo...

Optimal sizing of standalone hybrid renewable power supply for mobile telephony base stations is considered in this paper. This task is very complex due to stochastic nature of input variables such as wind speed, solar irradiance, ambient temperature and electric load. Further concern is modeling of the power consumed by cooling devices which is al...

This paper presents a laboratory setup for testing and experimental verification of fault detection methods based on contactless measurement of power line magnetic field. The setup consists of a physical power line model scaled to laboratory conditions with two orthogonal measuring coils installed on one support pole underneath phase conductors. Vo...

Porast broja energetskih pretvarača u savremenim industrijskim postrojenjima dovodi do povećanja ukupnog harmonijskog izobličenja napona i struje. Prisustvo izobličenih napona i struja zahtijeva novi pristup projektovanju pasivnih kompenzatora za industrijske potrošače, koji se zasniva na kompenzaciji neaktivne snage. U ovom radu je sprovedena anal...

U ovom radu je teorijski opisan i softverski implementiran metod za analizu performansi samostalnih fotonaponskih sistema, baziran na sekvencijalnoj Monte Carlo simulaciji. Metod je testiran na primjeru napajanja bazne stanice mobilne telefonije. Rezultati simulacija pokazuju koliko se godišnje iskoristi solarne energije, koliko časova u toku godin...

In this paper, a stochastic simulation procedure for energy assessment of PV systems is developed and tested. The method is especially adequate for urban applications since the impact of surrounding obstacles both for direct and diffuse irradiance is taken into account. The main input is the system location along with its monthly average irradiance...

U radu je analizirana mogućnost primjene modifikovanog metoda zasnovanog na optimizaciji rojem čestica za određivanje optimalne konfiguracije distributivne mreže. Modifikacija je urađena u cilju bržeg dobijanja optimalnog uklopnog stanja distributivne mreže, uz zadržavanje stabilnosti konvergencije algoritma. Navedena su tehnička ograničenja koja t...

Fault passage indicators (FPIs) and fault locators (FLs) are employed in modern distribution networks in order to enhance the process of fault localization, thus resulting in reduction of interruption time and improving the reliability of power supply. In this paper, a novel probabilistic techno-economic optimization method is proposed for determin...

One of the effective strategies for increasing reliability of the distribution networks is to perform a faster fault localization. The common techniques for accelerating the process of finding the faults are based on application of fault locators and fault passage indicators. The goal of this study is to assess the performance of both techniques, e...

In this paper a methodology for determining proper number and positions of fault passage indicators (FPIs) in medium voltage distribution networks with installed fault locators (FLs) is proposed and discussed. The main goal is to achieve the techno-economic balance, by obtaining maximum improvement of the reliability indices while using the minimum...

In this paper a methodology for determining proper number and positions of fault passage indicators (FPIs) in medium voltage distribution networks with installed fault locators (FLs) is proposed and discussed. The main goal is to achieve the techno-economic balance, by obtaining maximum improvement of the reliability indices while using the minimum...

U radu je analizirana mogućnost primjene metaheurističkog metodа zasnovanog na Binary Particle Swarm Optimization (BPSO) za određivanje optimalne konfiguracije distributivne mreže u cilju minimizacije gubitaka aktivne snage. Algoritam je testiran na IEEE mrežama sa 33 i 69 sabirnica. U cilju pokazivanja efikasnosti algoritma, rezultati dobijeni pri...

U radu je opisan princip rada i matematički model trofaznog matričnog pretvarača s ciljem razvoja simulacionog modela pogodnog za analizu regulisanih elektromotornih pogona. Primjenom matričnih pretvarača izbjegava se potreba za elektrolitskim kondenzatorom u jednosmjernom međukolu, te se značajno smanjuje sadržaj viših harmonika u talasnom obliku...

Tema rada je metodologija za određivanje godišnje proizvodnje fotonaponskih sistema uz uvažavanje uticaja okolnih objekata koji prave sjenku. Odabrani su prigodni matematički modeli kojima se adekvatno uvažavaju geometrijske i energetske karakteristike sistema. Procjena godišnje proizvodnje izvršena je u skladu sa principom tipične meteorološke god...

In this paper some of the problems related to electrical drives in modern elevators are presented. These are the modeling of jerk and the definition of the motion trajectory, power savings, efficiency optimization and possibilities for energy storage in generator mode, and application of suitable converters and control techniques for the implementa...

This paper analyses the possibility of decreasing the active power losses in 110 kV transmission network in BiH/RS by using phase shifting transformer. The network before and after connection of phase shifting transformer on the line with the largest power flow is simulated by a commercially available software package. The optimal phase shift requi...