Susceptibility Analysis of Different Communication Technologies in Presence of High Power Charging Emissions

In the context of the electrification of public and heavy duty transportation vehicles, large batteries are implemented providing driving distances of several hundred kilometers. With the increase of battery capacity also comes a significant increase of its recharge time. Thus, currently a working group deals with new specifications for Megawatt Charging Systems (MCS) to enable DC charging at power levels of a few megavolt-amperes. Apart from the intended energy flow, the power electronic systems generate unwanted broadband emissions due to switching operations of the converters. These, in return, are coupled onto the wired communication lines, routed in parallel to the DC lines inside the charging cable, causing a potential degradation of the system. Therefore, a communication technology providing a sufficient data rate while not being susceptible to the disturbances generated by the power electronics of the chargers, is mandatory. This work focusses on the comparison of Controller Area Network (CAN), 100Base-T1 and Power Line Communication (PLC) as wired communication systems regarding their suitability for this purpose. Initially, typical disturbances of DC charging stations are identified and an appropriate test setup is proposed to generate the typical disturbances. Subsequently, measurements are conducted and the impact on the communication systems at physical and transport layer are compared and evaluated, respectively.