Calculation of the self-consumption index for household consumers with PV and battery systems

V uvodu je predstavljen namen diplomskega dela, ki je kratek opis delovanja sončne elektrarne in njenih komponent, opis neto obračunavanja električne energije in vpliv velikosti sončne elektrarne in baterijskega sistema na delež samooskrbe. V glavnem delu naloge sem opisal neto obračun električne energije in opravil izračune, ki kažejo na to, da se tovrstni način obračunavanja izplača tudi manjšim gospodinjskim porabnikom, saj se investicija povrne že v okoli 10 letih. Gospodinjstvom, ki pa imajo večjo porabo električne energije, se investicija povrne še nekoliko prej. V nadaljevanju sem s programskim paketom Matlab izvedel simulacijo, kjer sem pokazal, kako število fotonapetostnih in baterijskih sistemov vpliva na delež samooskrbe. Ugotovil sem, da povečevanje števila baterij in modulov povečuje samooskrbo ter kakšna je najcenejša kombinacija števila modulov in baterijskih sistemov. V zaključku pa sem povzel dobljene rezultate in jih komentiral.The introduction of the diploma thesis presents the purpose of the thesis, a short description of a solar power station operation and its components, net accounting of electric power and influence of solar power station size and battery system on self-sufficiency share. The main part of the thesis indicates net accounting of electric power and calculations which show that such method of accounting is worth it also for smaller household users for investment is refunded in around 10 years. For those households that consume more electric power the investment is refunded even earlier. With the packaged software Matlab I carried out simulation in order to show what influence the number of photovoltaic and battery systems have on self-sufficiency share. I found out that the larger number of batteries and modules increases self-sufficiency and what the cheapest combination of module and battery system number is. The results gained are summarized and commented in the final part of the thesis