Istosmjerne mikro mreže

master's thesis

• Title (english): DC micro-grids
• Author: Mia Gredelj
• Mentor: Nenad Debrecin (mentor)
• Committee member: Nenad Debrecin (predsjednik povjerenstva)
• Committee member: Ivar Wangensteen (član povjerenstva)
• Committee member: Slavko Krajcar (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2014-05-26, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

Većina trošila današnjeg konvencionalnog elektroenergetskog sustava pogonjena je istosmjernom strujom. No, kako obnovljivi izvori energije kao što su fotonaponski sustavi i energija iz vjetra postaju sve češći u kućanstvima, DC mikro-mreže mogle bi postati jeftinija i učinkovitija alternativa. Novi izvori svjetlosti (LED) također mogu značajno smanjiti potrošnju električne energije. Dvije alternative predviđene su u ovom radu: samostalna, u kojoj mikro-mreža nije spojena na glavnu elektroenergetsku mrežu te je potrebno lokalno spremište energije (baterija) i alternativa kada je sustav spojen na mrežu.
Nakon pregleda i istraživanja relevantne literature za ovu temu te pisanja teoretskog dijela rada, zadaci su bili sljedeći. Opisano je jedno tipično četveročlano domaćinstvo i za taj slučaj su izrađene satne krivulje opterećenja za period od godine dana, s tipičnim zimskim i ljetnim danima. Sljedeći je zadatak bio generirati godišnju proizvodnju električne energije iz solarnih panela, instaliranih u promatranom domaćinstvu, u programu INSEL. S prethodno navedenim podacima te potrebnim informacijama o cijenama svih nužnih komponenti i cijenama u hrvatskom elektroenergetskom sustavu, bilo je moguće provesti analize izvedivosti i ekonomske analize u kojima su prethodno navedene dvije alternative bile promatrane. Mijenjanjem pojedinih parametara u tim ekonomskim analizama nekoliko scenarija je uzeto u obzir. Na kraju su donešeni zaključci o tome koja je od tih opcija isplativija te pod kojim uvjetima. Također su dani prijedlozi za daljnji rad na tu temu.
Rad je ostvaren kao dio zajedničkog projekta “Sustainable Energy and Environment in Western Balkans” koji ima cilj razviti i uspostaviti pet novih međunarodno priznatih diplomskih studija u području okoliša i održivog razvoja, jedan na svakom od pet suradničkih sveučilišta u tri države zapadnog Balkana. Projekt je financiran kroz program vlade Kraljevine Norveške za visoko školstvo, istraživanje i razvoj u zemljama zapadnog Balkana, Program 3: Energetski sektor (HERD Energy) u razdoblju 2011.-2014.

Abstract (english)

The conventional electrical system in place today sees our electrical devices powered by AC mains. But as renewable technologies such as solar photovoltaic and wind power become more prevalent at a household level, DC micro-grids could be a cheaper and more efficient alternative. New lighting devices (LED) can reduce the electricity consumption substantially. Two alternatives are envisioned in this paper: A stand-alone alternative in which there is no grid connection, that would require local storage (battery), and a grid-connection alternative.
After reviewing and investigating relevant literature for this topic and writing theoretical part of thesis there were the fallowing tasks. One typical four member family household was described and hourly load curves for one year period, with typical summer and winter days, were made for this case. Next task that was completed was generating yearly energy production from solar panels, which the observed household contains, in INSEL software. With having those previously mentioned data, combined with necessary information about prices of all necessary components and prices from Croatian power system, it was possible to make feasibility and cost analysis where the two previously mentioned alternatives were investigated. With changing some parameters in that economical analysis several scenarios were observed. At the end conclusions were made about which one of those two options is more profitable and under what conditions. Also, suggestions were made for further work on this topic.
This assignment is realized as a part of the collaborative project “Sustainable Energy and Environment in Western Balkans” that aims to develop and establish five new internationally recognized MSc study programs for the field of “Sustainable Energy and Environment”, one at each of the five collaborating universities in three different WB countries. The project is funded through the Norwegian Programme in Higher Education, Research and Development in the Western Balkans, Programme 3: Energy Sector (HERD Energy) for the period 2011-2014.

• Keywords: istosmjerna; mikro-mreža; trošila; krivulja opterećenja; fotonaponski; troškovi; korist
• Keywords (english): direct current; micro-grid; load; load curve; photovoltaic; costs; benefits
• Language: english
• URN:NBN: urn:nbn:hr:168:392049
• Study programme: Title: Electrical Engineering and Information Technology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije (magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2018-02-06 09:01:00