Effektivisering av mellanspänningsnät med enkla medel
Feldetektorer och sommardriftläge
Renewable energy and the charging of electrical vehicles will increase in the future. Therefore the risk of outages is also increasing, partly because renewable energy is intermittent and the production amount can change fast. Charging electrical vehicles is often demanding high effect in short time, which could make faults occur. It takes more advanced technology to short the outage time. Today Övik Energi has high reliability in the power grid, but in order to maintain the reliability, it is time to prevent problems that can occur in the future. This thesis has presented a suggestion for the placement of fault detectors Protrol IPS2, in which a total of four detectors is proposed. Two in the substation in Bodum, one in the substation near Nolaskolan and the last one in substation Dekarsön 2. The detectors is designed for installation on the 0,4 kV side of the transformer. The result of this investment is expected to be shorter sectioning time and therefore shorter outage time. This thesis has also shown that, by comparing three operation cases, it is beneficial to let one of the four power transformers (130/10 kV) be shut down over the six months from April to September. By turning transformer T2, 16 000 SEK or 69 393,6 kWh could be saved annually. The saving for turning transformer T4 of is 34 000 SEK or 80 373,6 kWh annually. These figures is representing 0,00295 % and 0,00342 % of the total annual distribution in the grid respectively. The carbon dioxide could decrease with 28,67 and 33,2 ton respectively.