Mätning av högfrekventa övertonervid laddning av elbil

With more Electric vehicles (EV) on the street, it will lead to an impact of the electric grid. In this work, the charging process of an EV the high-frequency harmonics will be analysed. A common problem with EV charging is that the AC DC converter produces highfrequency harmonics, which can lead to function loss for electronics at home or reduce the lifetime. Today's environmental goal of reducing CO2 emissions from transport has led to more and more fossil-free cars starting to roll on the road. With more and more battery-powered electric cars on the roads and sales of electric cars pointing up, more and more questions are raised about how electric car charging affects the electric grid and above all how it will affect surrounding equipment that is close or on the same node when electric cars are being charged. This thesis will have a deeper look into the high fervency’s harmonics during charging. The range of interest is 2 kHz and 200kHz. The reason for choosing the range is that there has been a new IES6100 standard that includes harmonics in the range of 2 kHz to 200 kHz. The measurement method was done by measuring a normal Dummy load, the charge box by itself, 2 different cars and with the 2 cars together. 1 car had only the option to charge at 3,7 kWh on one phase and the second car was charge with 11 kWh on 3 phases. Measurement points where the voltage between Phase and Ground together with Neutral and Ground. The current was measured on one Phase and Neutral. The reason to have the ground as a referencing point is to see how much of a voltage the Neutral will get during charging. Due to lack of time and lack of ICE standard combined with the Covid19 situation measurements have been done manually and only on 2 different types of EV’s and during different battery levels. But this thesis has a good base for future evaluations of high frequency’s harmonic analyses of different Electric vehicles. The results of the measurements have been reported in a different section. Together with the spectrum diagram and Diagram of the number of the individual harmonics