Omriktare för solceller med energilager

Examensarbete på grundnivå

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Type: Examensarbete på grundnivå
Title: Omriktare för solceller med energilager
Authors: Olofsson, Simon
Johansson, Markus
Abstract: Box of Energy is a company in Gothenburg who offers battery storage in connection to both solar energy and wind energy and direct connection to the electric grid. They are working to raise the output power that their battery storage can deliver. One way to solve that is to find a new inverter. The company have also received a project to calculate how much battery storage is needed for a row of garages in a residential area where plug-in hybrid and electric cars will be charging. The purpose of this essay has been to find a new inverter for Box of Energy. This, so the company would be able to increase the output power of their battery storage. A market research was made by going to different inverter manufactures homepages and go through their datasheets for the inverters they offered. The project then went on to compare different providers of battery storages on the market. This was also done by visiting their homepages and going through datasheets. Then, lastly, calculation of the charging power for hybrid and electrical cars in a residential area was carried out. The area consisted of 150 houses and rows of garages with 16 garages on each row. The charging of the cars is assumed to happen simultaneously and that leads to very high load on the electric grid. By installing battery storage between the electric grid and the cars the load will be lower. Through the market research it was established that there is a big range of different inverters. They vary in both capacity and physical size. The inverter that was considered the most interesting one was SG10KTL-EC and is delivered by Sungrow power. When it comes to the residential area it could be established that the amount of battery storage was linked to the charging power that the cars demanded. If the garages only contained electric cars and not plug-in hybrids the load would be the highest and demand the biggest amount of battery storage units. At the same time, it could be established that the effect of not using any battery storage would lead to the need of changing the fuse since the original one would be too low. It would also be needed to install new cables. Should, on the other hand, a currently theoretical software be implemented that can distribute the charging of the cars evenly during the night, the load becomes significantly smaller and then battery storage would not be a necessary solution.
Keywords: Elkraftteknik;Electric power engineering
Issue Date: 2017
Publisher: Chalmers tekniska högskola / Institutionen för energi och miljö
Chalmers University of Technology / Department of Energy and Environment
Collection:Examensarbeten på grundnivå // Basic Level Theses

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